French Bean Phaseolus Vulgaris Research Articles

Performance of French bean (Phaseolus vulgaris L.) Genotypes under Trans-Gangetic Plains Region

Background: French bean is one of the nutritious leguminous crops which is an integral part of Indian cuisine and popular in overseas countries from a long time. At different parts of the world several researches have been implemented and still in continuation for the improved production of the crop. Methods: This experiment study was conducted at the Vegetable Research Farm of Lovely Professional University, Punjab in the summer season during 2021 and 2022, respectively. The experiment comprised of total 21 genotypes consisting of three replications which were laid out in randomized block design for different growth and yield parameters of French bean. Result: The pooled analysis data showed significant differences between various growth and yield traits. From the acquired results it was found that the genotype IC-043572 (T6) was more adaptive and productive over other evaluated genotypes of French bean in various growth characters including germination percentage (95.40%), plant height at 30 DAS (17.85 cm), 45 DAS (35.02 cm) and final harvesting stage (42.51 cm), number of leaves at 35 DAS (25.69), 45 DAS (54.65) and final harvesting stage (100.48), fresh (13.58 g) and dry (5.80 g) weight of root, fresh (113.96 g) and dry (88.53 g) weight of shoot and yield characters like pod length (14.68 cm), weight of individual pod per plant (5.65 g), green pod yield per plant (205.50 g) and green pod yield per hectare (59.51 t) under Trans-Gangetic plains region.

Evaluation of Planting Dates and Varieties of Pole Type French Bean (Phaseolus vulgaris L.) in Southern Odisha

For any crop production, the time for sowing seeds and different promising varieties is important for economical yield. Suitable varieties availability is a major lacking factor as a pole type French bean cultivation in Odisha during off-time. Very little information is available on different aspects of pole type cultivation of French bean cultivation in the Southern part of Odisha. The present investigation was conducted at Post Graduate Research Farm, Centurion University of Technology and Management, Paralakhemundi, Odisha during early rabi 2022. The experiment was carried out the for the performance study of four different planting dates (3rd September, 18th September, 2nd October and 17th October) and five French bean varieties (Ayoka-427, Gloria, Akamsha, Raikia Bean, Moraleda) in Split Plot Design with three replications. The result of the experiment revealed the effect of planting dates in the highest plant height, minimum days took to first flowering, days to 50% flowering, maximum primary branch number, number of green pods per cluster, number of green pods per plant, average green pod weight, green pod length, pod width, pod yield per plant and green pod yield per hectare was observed on 17th October which was noted statistically similar or followed by the planting date 2nd October. Among the varieties, Ayoka-427 and Raikia Bean excelled in other varieties in different growth parameters, flowering, yield and yield attributes. Hence it can be concluded that Ayoka-427 and Raikia Bean may be suggested to the farmers to cultivate in October month under the Southern part of Odisha.

Effect of drip irrigation and organic mulches on growth, yield and water-use efficiency of French bean (Phaseolus vulgaris)

French bean (Phaseolus vulgaris L.) is an important crop for green and dry beans while tender pods as vegetable. An experiment was conducted during March–June 2021 at the research farm of Dr Y S Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh to assess the effect of different irrigation levels and organic mulches on soil properties, growth and productivity of French bean. Experiment was laid out in Randomized Block Design with 3 replications comprising of 7 treatments. The study resulted, that plant height, no. of pods per plant, days to first harvest and yield of French bean were significantly affected by different irrigation levels and organic mulches. The maximum yield, water use efficiency, B:C ratio were observed under treatment I1M2 (80% ETc + Grass mulch). Therefore, adopting drip irrigation with mulching can contribute to increasing irrigated area and enhancing yield potential of French bean in the mid hill zone of Himachal Pradesh.

Relative Abundance of Insect Pests on French Bean (Phaseolus vulgaris L.) in Relation to Abiotic Factors

The present investigation was carried out during Rabi 2021-22. The incidence of insect pests like aphid, whitefly, Jassid, leaf miner, pod borer was initiated 25 days after sowing till harvesting. The highest incidence of Jassid was observed on French bean crop at 9th SMW (7.20 per cage) and lowest 1st SMW (0.30 per cage), Aphid 8thSMW (45.20 aphids per 10cm terminal shoot) and 52thSMW (2.60 aphids per 10cm terminal shoot). The highest incidence of whitefly observed in 8th SMW (20.70 per cage) and lowest 2nd SMW (0.60 per cage). The highest incidence of Leaf miner was recorded in 11th SMW (40.50% leaf damage) and lowest in 51th SMW (1.50% leaf damage). The highest incidence of pod borer was noticed in 9th SMW (8.70 larvae per plant) and lowest in 1st SMW (0.30 larvae per plant). The Jassid population showed highly significant positive correlation with sunshine and positive significant correlation with maximum temperature and positive correlation with minimum temperature whereas, significant negative correlation with rainfall and negative non-significant correlation with relative humidity. The aphid population showed highly significant positive correlation with sunshine and positive non-significant correlation with minimum and maximum temperature. The whitefly population showed highly significant positive correlation with sunshine and positive non-significant correlation with minimum and maximum temperature. The leaf miner population showed positive highly significant correlation with minimum and maximum temperature and significant positive correlation with relative humidity. The pod borer population showed highly significant correlation with maximum temperature and sunshine. The information generated in the present research can be successfully utilized to formulated effective insect pest management strategies in French bean.

Sustainable performance of French bean (Phaseolus vulgaris L.) cultivation, a livelihood component in Eastern Himalayan Region

ABSTRACTThis paper attempts to measure the sustainable performance of French bean (Phaseolus vulgaris L.) cultivation, a livelihood component in Eastern Himalayan Region (EHR). The objectives of the study were to examine the role, and the sustainable performance of French bean as a livelihood component in EHR. Altogether, 240 French bean growers had included from two selected districts of Nagaland, EHR. The contribution of French bean cultivation, contribution from other livelihood activities and annual expenditure pattern, 12 parameters under each of 4 indicators (economic, social, human and environmental) of sustainability were assessed. A relationship was established between the sustainability index and the livelihood index. French bean cultivation was ranked as the first, and other livelihood activities in descending order are; livestock-based, crop-based (excluding French bean), Off-farm, and forest-based livelihood. Despite less income from French bean cultivation than other countries, it is contributing about 43.00% to annual income and 73.00% to the yearly expenditure of growers. Thus French bean cultivation is a sustainable livelihood component. The study adopted a framework that can assess the sustainable performance of other crops/activities under similar/different agroecology. The policy process should emphasize higher productivity and more income from it and bring all-round development of the EHR.

Effect of Integrated Nutrient Management on Growth and Yield of French Bean (Phaseolus vulgaris L.)

The present investigation entitled, “Effect of integrated nutrient management on growth and yield of French bean (Phaseolus vulgaris L.)” was carried out at the research farm of School of Agriculture, Abhilashi University, Mandi (H.P.) during spring season 2022. The experiment was laid out in a randomized block design with three replications. The treatments consisted of conjoint and sole application of organic (FYM and vermicompost) and inorganic fertilizers (urea, SSP and MOP). In terms of soil chemical properties i.e., soil pH (5.6) strongly acidic, organic carbon (0.99%) i.e. high and NPK (260:18:336) kg/ha were maximum observed in treatment T7 (75% RDF of NPK + 12.5% FYM + 12.5% Vermicompost. Out of seven treatments, treatment T7 was recorded best performing for all the traits i.e. days to 50% germination (14.06), leaf area index at 60 DAS (105.32 cm2) and at harvest (130.65 cm2), fresh weight of plant (189.20 g), dry weight of plant (20.03 g), yield per plot (17.45 kg), yield per hectare (290.84q/ha), biological yield (29.47q/ha) and harvest index (59.19%). The maximum gross return (581680 Rs/ha), net return (483209 Rs/ha) and B:C ratio (1:5.9) was also recorded in T7 75% RDF of NPK + 12.5% FYM + 12.5% Vermicompost. Thus, application of optimum doses of NPK along with organic manures was found highly beneficial for plant growth, yield and economics of French bean.

Biochemical changes due to Pathogenesis in French beans (Phaseolus vulgaris l.) Infected by rhizoctonia solani Kuhn

French Bean (Phaseolus vulgaris l.) belongs to the family Fabaceae and is native to south america. French bean has evolved from wild growing vine distributed in the high lands of Middle america and andes. this important legume crop is grown for its dry grain and tender pods in north-Western India. this offseason crop can be successfully raised under Punjab conditions during winter season which fetches higher price in the market and economical to the farmers when there is no availability of green pods from high altitude. It is widely cultivated in tropics, sub-tropics and temperate regions. When bean plant infected by fungal, bacterial or any other pathogen, different alternations are observed. the present study was carried out in the department of Botany, darrang college to compare the biochemical changes occurring in bean plants growing in normal soil, and sterilized soil mixed with fungus rhizoctonia solani .

Influence of Mulching and Organic Manure on the Growth and Pod Yield of French Bean (Phaseolus vulgaris L.)

An experiment was conducted at the Horticulture Farm of Sher-e-Bangla Agricultural University, Dhaka during November 2020 to March 2021 to study the influence of mulching and organic manure on the growth and pod yield of French bean (Phaseolus vulgaris L.). French bean variety BARI Jharsheem-2 was used as planting material in this study. The experiment consisted of two factors: Factor-A: mulch materials (4 levels): M0 = No mulches, M1 = Black polythene, M2 = Rice straw and M3 = Water hyacinth; Factor-B: T0 = No organic manure, T1 = Kitchen compost (5 t ha-1), T2 = Vermicompost (7 t ha-1) and T3 = Kitchen compost + Vermicompost (2.5 t ha-1 +3.5 t ha-1). In the trial, the M1 (Black Polythene Mulch) treatment outperformed the M0 (No Mulch) treatment in terms of plant morphology and yield and yield attributes. Higher pod yields per hectare were produced by the organic manure T3 (Kitchen compost + Vermicompost) than by the control T0 (no organic manure). The investigation's top treatment combination was identified as M1T3 (black polythene mulch and kitchen compost + vermicompost), which had a 17.55 tha-1 yield potential. At the interaction level between mulching and organic manure, a significant correlation between the yield and yield components was found.

Root nodulation and yield of French bean (Phaseolus vulgaris) are altered by fallow length in slash-and-burn agriculture

ABSTRACT Shifting cultivation (Jhum) involves the conversion of forest land to agricultural land, and two successive Jhum cultivations in a patch of land make a Jhum cycle. Shortening of the cycle to meet population needs is a challenge, and one potential solution is to use N2-fixing, trees in fallow-phase and crops in cropping-phase. A pot experiment was conducted with soil from 2-, 4-, and 8-years fallows of alder-based (N2-fixed) and traditional Jhum agroecosystems, grown with surface-sterilized local French beans (design: CRD). A factorial micro-plot field experiment was also set up in alder-based Jhum sites in 2-, 4-, and 8-years fallow. In both, soil physico-chemical and biological properties, root nodulation and yield attributes of French beans were studied. Root nodulation and biomass yield attributes were higher in alder-based systems compared to traditional, with comparable improvements seen in shorter fallows. At harvest, yield parameters were in the order of 4->2->8-years in alder-based and 8->4->2-years in traditional Jhum soil. Rhizobium populations may decrease with longer fallow lengths without a host and fire stress of Jhum. Fallow length effect on all soil parameters, with increased values as length increased in both Jhum. Combination of soil-fertility and nodulation led to higher grain yield in 4-year-fallows of alder-based Jhum.

Effect of Photosynthetic Bacteria, Vermiwash and Phosphorus Solubilizing Bacteria on Growth, Yield and Quality of French Bean (Phaseolus vulgaris L.)

The present investigation was carried out with title ‘Effect of Photosynthetic bacteria, Vermiwash and Phosphorus Solubilizing Bacteria on growth, Yield and Quality of French bean (Phaseolus vulgaris L.)’ at the Central Research Farm, Department of Horticulture, Naini Agricultural Institute, Sam Higginbottom University of Agriculture Technology and Sciences, Prayagraj, Uttar Pradesh during the 2021-22 with a view to identify the effects of different combinations of biofertilizers and organic nutrition and its role in growth, yield and quality of French bean variety Lakshmi. The experiment was laid in Randomized block design with 7 treatments and 3 replications with different combination in Biofertilizers and application of organic nutrition. Under this experiment, overall, 7 treatment was taken T1 (Photosynthetic Bacteria @ 30 ml/ m2 (PSB-1)), T2 (Vermiwash @ 40 ml/ m2 (VW)), T3 (Phosphate Solubilizing Bacteria (30 ml/ m2) (PSB-2)), T4 (PSB-1 + VW (40 each ml/ m2)), T5 (PSB-1 + PSB-2 (30 ml/ m2)), T6 (PSB-2 + VW (40 ml/ m2)) and T0 (Control). From the above experimental finding it was concluded that the treatment T5 (PSB-1 + PSB-2 (30 ml/ m2) was found to be best in the terms of growth parameters like plant (240.51 cm), plant spread (1984.64 cm2), earliness parameters like days to first flowering (54.33 days), days to 50% flowering (64.67 days), days to first pod setting (59.78 days) and days to first pod picking (67.47 days). T5 (PSB-1 + PSB-2 (30 ml/ m2) was also found best in terms of yield parameters like number of pods per plant (132.33 pods), pod length (13.73 cm), pod width (10.11 mm), individual pod weight (7.99 g), yield per plant (1.04 kg/plant) and yield per hectare (12.53 t/ha) of French bean. Therefore, Treatment combination of biofertilizers T5 (PSB-1 + PSB-2 (30 ml/ m2) can be suggested for better yield achievement in French bean.

Effect of Soil Acidity Amelioration on Soil Properties and Yield of French Bean (Phaseolus vulgaris L.) under Rainfed Condition in Arunachal Pradesh

Under rainfed conditions yield potential of French bean reduced in the acid soil of Arunachal Pradesh due to low fertility and metal toxicity. Therefore, the current experiment was conducted in ICAR, Basar, Research Farm during rabi season (October–January) of 2018, 2019 and 2020 to study the effect of soil amelioration using organic amendments combined with inorganic fertilizer on the yield of French bean and important soil properties. The soil amendment treatments i.e., control, vermicompost (Vc), vermicompost+lime (Vc+lime), 50% RDF (Recommended dose of fertilizer), 50% RDF+lime, 50% RDF+Vc, 75% RDF, 75% RDF+lime, 75% RDF+Vc, 100% RDF were laid in randomized block design with three replications. The doses of vermicompost, lime and RDF were 2.5 t ha-1, 400 kg ha-1 and 50-50-50 NPK kg ha-1. Results showed soil pH recorded maximum and exchangeable aluminum, exchangeable acidity and total acidity recorded minimum in 75%RDF+lime. The soil organic carbon, soil cation exchangeable capacity, soil moisture content and soil available nutrients (N, P, K, S, Fe, Mn, Zn, Cu) recorded maximum and soil bulk density recorded minimum in 75%RDF+Vc. Vermicompost along with 75%RDF was most effective in increasing the yield (4.85 t ha-1). The study indicates soil acidity amelioration using vermicompost and/or lime along with inorganic nutrients reduced soil acidity and improved the soil fertility making the soil environment favorable to achieve an optimum yield of French bean in acid soils of Arunachal Pradesh.

Assessing the role of ACC deaminase-producing bacteria in alleviating salinity stress and enhancing zinc uptake in plants by altering the root architecture of French bean (Phaseolus vulgaris) plants.

The consortium inoculation with strains R1 and R4 modified the root system to boost seedling growth, increase the zinc content of French bean pods, and reduce salinity stress. The present study demonstrated the effect of two 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase-producing plant growth-promoting rhizobacteria (Pantoea agglomerans R1 and Pseudomonas fragi R4) alone and consortia on the root system development, French bean growth, and zinc content as well as salinity stress tolerance. Both the strains were characterized for ACC utilization activity (426.23 and 380.54nmol α-ketobutyrate mg protein-1h-1), indole acetic acid (IAA) production, phosphate solubilization, ammonia, hydrogen cyanide (HCN), and siderophore production. The strains exhibited zinc solubilization in both plate and broth assays with zinc oxide and zinc carbonate as zinc sources as validated by atomic absorption spectroscopy (AAS). Single or combined inoculations with the selected strains significantly modulated the architectural and morphological traits of the root system of French bean plants. Furthermore, the application of R1and R4 consortia has enhanced zinc content in roots (60.83mgkg-1), shoots (15.41mgkg-1), and pods (30.04mgkg-1) of French bean plants grown in ZnCO3 amended soil. In another set of pot experiments, the consortium bacterization has significantly enhanced length as well as fresh and dry biomass of roots and shoots of the French bean plant under saline stress conditions. Additionally, inoculation with ACC-degrading rhizobacterial strains has increased chlorophyll and carotenoid contents, osmoprotectant content, and antioxidative enzyme (catalase and peroxidase) activity in comparison to their counterparts exposed to salt treatments only. Current findings suggested ACC deaminase-producing rhizobacterial strains hold the potential to improve root architecture which in turn promotes plant growth under salt-stressed conditions as well as enhances micronutrient concentration in host plants.

Development of organic nutrients management system for profitable and soil-supportive French bean (Phaseolus vulgaris L.) farming in North Eastern Himalayas, India

French bean (Phaseolus vulgaris L.) cultivation faces multipronged challenges of low farm productivity, poor economic returns, and soil health deterioration in the hilly ecosystem of India. Hence, the development of a cost-effective and soil-supportive French bean cultivation technology is highly warranted. Thus, a field experiment was conducted for two consecutive seasons in the Sikkim region of the Indian Himalayas to assess the impact of different organic nutrient sources on the production potential, profitability, and soil health of French bean. Eight organic nutrient management practices, viz., farmers' practice, 100% recommended dose of nitrogen (RDN) through FYM, 100% RDN through mixed compost (MC), 100% RDN through vermicompost (VC), 50% RDN through FYM + 50% RDN through MC, 50% RDN through FYM + 50% RDN through VC, 50% RDN through MC + 50% RDN through VC, and 33% RDN through FYM + 33% RDN through MC + 33% RDN through VC, were assigned in a three times replicated randomized complete block design. The results revealed that the supply of 33% RDN through FYM + 33% RDN through MC + 33% RDN through VC 33% recorded the highest pod yield (8.30 and 8.00 Mg ha−1) and net returns (1,831 and 1,718 US$ ha−1). Furthermore, the supply of 33% RDN through FYM + 33% RDN through MC + 33% RDN through VC 33% also had a positive impact on soil health. It was shown that an equal supply of RDN through FYM + MC + VC increases soil pH by 8.35%, SOC by 5.45%, available N by 6.32%, available P by 16%, available K by 9.92%, and micronutrients by 5–7% over farmers' practice. Thus, the supply of RDN through the integration of FYM + MC + VC in equal proportion is an economically robust and soil-supportive nutrients management practice for organic French bean production in the hilly ecosystem of North East India.

Dry Matter and Pod Yield of French Bean Varieties As Influenced by Various Nitrogen Application

Nitrogen (N) requirement of French bean (Phaseolus vulgaris L.) in Bangladesh is not yet determined. The present study has evaluated the performance of French bean varieties and nitrogen rates through a field experiment conducted at the research field of Plant Physiology Section of Horticulture Research Centre, Bangladesh Agricultural Research Institute (BARI) during rabi seasons of 2016- 17 and 2017-18). The experiment was set up with frenchbean varieties BARI Jharshim-1 and BARI Jharshim-2 and N rates viz., 0, 75, 100, 125 and 150 kg N/ha arranged in a randomized complete block design, with three replications. The variety BARI Jharshim-1 treated with 150 kg N/ha produced the highest in respect of shoot dry matter yield (879.65 g/m2), number of pods/plant (29.70), weight of pods/plant (147.20 g) and green pod (marketable) yield of 19.48 t/ha); in contrast, lower yield and yield attribute was obtained with BARI Jharshim-2 with 125 kg N/ha. Pods of both varieties showed appreciable amounts of protein, vitamin-C and vitamin-A when N was fertilized at 125 followed by 150 kg/ha.
 Bangladesh J. Agril. Res. 46(4): 425-433, December 2021

Integrated Nutrient Management of French Bean (Phaseolus vulgaris L.) in Subtropical Humid Zone of Nagaland, India

Background: French bean is one of the most precious and highly relished widely grown short duration legume vegetable. This investigation is intended to assess the integrated manner of nutrient management for higher productivity of French bean under acidic soil condition in subtropical humid zone of Nagaland. Methods: The experiment was carried out during three consecutive years (2017-2018, 2018-2019 and 2019-2020) of rabi season on French bean at Horticultural Research Farm, School of Agricultural Sciences and Rural Development, Medziphema, Nagaland University with the combination of eight treatments. The experiment was laid out in randomized block design with three replications using the variety Arka Komal. Result: The pooled results of three years revealed that the highest growth, quality and yield parameters were observed in treatment T3 (75% NPK through inorganic + 25% N through vermicompost) with maximum plant height (35.68 cm), no. of pods per plant (27.77), no. of seeds per pod (7.01), length of pod (13.96 cm), width of pod (10.58 mm), fresh weight of pod (4.22 g), fresh yield (153.61 q ha-1), crude protein content (28.83%) and benefit cost ratio (4.06) of French bean which was found significantly superior over other treatments.

DUS Characterization and Evaluation of Untapped French Bean (Phaseolus vulgaris L.) Genotypes

French bean is being considered as an important legume for human diet having rich source of dietary proteins, minerals and vitamins. Germplasm characterization and evaluation is having great contribution in breeding and crop improvement. Substantial phenotypic and genetic characterization of untapped French bean germplasm are still needed to unlock its breeding potential. Purposefully, 27 diverse French bean genotypes comprising primitive, cultivars, commercial cultivars, farmers grown varieties were collected from different parts of India, characterized as per Distinct, Uniformity and Stability (DUS) and evaluated for associated morpho-phenological traits in randomized complete block design. The screened panel revealed highly significant differences among French bean genotypes for all the traits under study which witnessed the existence of sufficient variability in the French bean genotypes in which first two Principal Component Analysis (PCA) explained 20.03% and 13.32% of the total morphological variability. The genotypes were well scattered in PCA axis forming groups with various traits as per contribution towards the variability. The genotype IC 632961 having desirable traits which could be an elite germplasm for future crop improvement.

Foliar Application of Salicylic Acid Enhances the Endogenous Antioxidant and Hormone Systems and Attenuates the Adverse Effects of Salt Stress on Growth and Yield of French Bean Plants

Salicylic acid (SA) is one of the strongest candidates to be used as a salinity moderator. A hydroponic experiment was conducted to evaluate the effect of foliar application of SA (0.00, 0.75 and 1.50 mM) on growth, productivity, and some physiological and biochemical parameters of French beans (Phaseolus vulgaris L.) continuously exposed to three NaCl levels (0, 50 and 100 mM). NaCl treatment significantly reduced vegetative growth parameters (between 16–50%), membrane stability (10–15%), relative water content (25–31%), chlorophyll content (21–42%), macro- and micronutrient levels (13–52% and 4–49%, respectively), growth promoters (auxins, gibberellins, and cytokinins; 11–28%), and yield of green pods (22–39%), while the phenolic compounds contents (35–55%), total antioxidant capacity (34–51%), proline (60–100%) and malondialdehyde (18–51%) contents, peroxidase activity (35–41%), Na+ (122–152%) and Cl− (170%) ions and abscisic acid (20–30%) contents were significantly increased compared to the non-salt-stressed controls. Foliar application of SA at 0.75 mM was able to overcome the adverse effects of NaCl stress to variable extent, which allowed for close to 90% of the yield of control plants to be reached. In conclusion, this study demonstrated that foliar spraying of SA helped to reduce the harmful effects of NaCl stress on French bean via regulation of some physiological and biochemical processes. This could be the basis of an effective and low-cost strategy to cope with salt stress.

Screening of pole type French bean (Phaseolus vulgaris L) genotypes for high yield potential under mid-hill conditions of Himachal Pradesh

Screening of pole type French bean (Phaseolus vulgaris L) genotypes for high yield potential under mid-hill conditions of Himachal Pradesh

Management of diseases and insect-pests of French bean in Northwestern Indian Himalayan region using integrated approaches

French bean (Phaseolus vulgaris L.) production is adversely affected by many pathogens and insect-pests worldwide. In the present investigation, effect of different bio-fortified composts, organic amendments, botanicals and pesticides were evaluated against diseases and insect- pests of french bean. The results showed that seed treatment and drenching with Trichoderma harzianum strain 11, followed by soil application of fortified farmyard manure resulted in the lowest root rot incidence, highest germination, vigour and yield in french bean. In another set of experiment, soil incorporation of Parthenium hysterophorus, Urtica dioicaandLantana camarawere found to reduce root rot incidence with high germination and pod yield. Among the bioproducts and botanicals tested, foliar spray of cow dung extract (50%) reduced angular leaf spot, rust and bacterial blight severity by 51, 69 and 25 per cent, respectively. Among the fungicides, foliar application of azoxystrobin 23 SC (0.1%) and difenoconazole 25EC (0.025%), also reduced angular leaf spot and rust severity by 93 and 90 per cent, respectively. Among different insect pest management strategies under field conditions, cartap hydrochloride and batain seed extract registered low sucking bug (Chauliops choprai) population. Integrated approaches including bio-agents, botanicals along with chemicals for managing these diseases and insect-pests were found appropriate options. Out of six different IPM modules evaluated, seed treatment with carbendazim along with foliar spray of 0.1% azoxystrobin and cartap hydrochloride resulted in lowest root rot, rust, angular leaf spot, bacterial blight and Chaulopsis choprai bug population in French bean.

Studies of genetic variability, correlation and path coefficient for various characters in French Bean

The research was conducted during the Rabi season of 2019-2020 on 32 genotypes of French bean (Phaseolus vulgaris L.) to evaluate genetic variability, correlation coefficient and path coefficient. The genotypes were studied for 13 different characters of growth and yield attributing characters in Randomized Block Design with three replications for each genotype. All characters recorded higher PCV value over GCV thereby indicating the influence of environmental factors in their expression. High heritability observed in all the characters studied and high heritability coupled with high genetic advance found in the parameters viz. number of pods per plant, average pod weight, 100 seed weight and pod yield per plant. Correlation coefficient analysis showed pod yield had significant and positive correlation with number of pods per plant, pod length, average pod weight and 100 seed weight. Path analysis revealed that maximum positive direct effect w.r.t pod yield per plant was brought about by the parameters viz. 100 seed weight, days taken to marketable maturity, number of seeds per pod, number of pods per plant, average pod weight, pod width and pod length hence, should be given more importance for genetic improvement to bring about an increase in overall production of french bean through enhanced pod yield per plant. SAARC J. Agric., 20(2): 83-91 (2022)