Root Dip Treatment Research Articles

Biocontrol Potential of Pseudomonas fluorescens (Migula) against Root-Knot Nematode, Meloidogyne incognita (Kofoid and White, 1919) Chitwood, 1949 on Tomato

Studies were conducted in greenhouse to assess the biocontrol potential of three strains of Pseudomonas fluorescens (Migula) viz., Pf-1, Pf-2 and Pf-3 at high (8 × 10 8 cfu/g) and low (4 × 10 8 cfu/g) dosages, as seedling bare root dip treatment against Meloidogyne incognita (Kofoid and White, 1919) Chitwood, 1949 on tomato. The plant growth was significantly better in all the treatments with the bacterium. The strain Pf-1 performed significantly superior to the other two strains at both the dosages. The bacterial treatment also reduced the level of infestation by the nematode, which was dosage dependent. The strain Pf-1 was superior to the other two. The nematode suppressing ability of the bacterial strains appeared to be related to their root-colonising ability.

Root Dip Treatments for Controlling Blueberry Stem Blight Caused byBotryosphaeria dothideain Container-Grown Nursery Plants

Root Dip Treatments for Controlling Blueberry Stem Blight Caused by<i>Botryosphaeria dothidea</i>in Container-Grown Nursery Plants

Bare Root Dip Treatment of Tomato Transplants with Paecilomyces lilacinus for the Control of Meloidogyne incognita

Results on the evaluation of bare root dip treatment of tomato seedlings in a spore suspension of Paecilomycis lilacinus for the control of Meloidogyne incognita is reported in this paper.

Inhibitory Effects of Two Organocarbamates Nematocides on Growth and Yield of Capsicum annuum, NP 46A, and Their Reversion by Gibberellic Acid

Summary Results have shown that two nematocides aldicarb and carbofuran at all the concentrations were inhibitory to the plant growth as well as for seed germination in Capsicum annuum. But the extent of toxicity was very low when applied as bare root dip treatment at lower concentrations (1-2 · 106ppm). Results on the effect od GA3 alone showed that 100ppm of GA3 was the optimum concentration for plant growth and seed germination. A combination of 100ppm of GA3 with graded concentrations (1-10 · 106 ppm) of aldicarb and carbofuran could reverse the inhibitory effects of both the nematocides on chilli plant. However, higher dosages of nematocides were able to nullify the stimulatory effect of GA3. An analysis of residual nematocides in plants after treating with graded concentration of nematocides indicated a linear increase in the amount of toxic residues as the concentration of nematocides was increased. But application of an optimum concentration of GA3 (100 ppm) along with graded concentration of nematocide (1-10 · 106 ppm) could significantly reduce the level of toxic residues in plants. thus, the results showed an antagonistic nature of GA3 against nematocide toxicity which might base upon its property to prevent the accumulation of toxic residues of nematocides in plants.

Effect of Seedling Root Dip and Main Field Treatment on Hirschmanniella mucronata and Rice Yield

Effect of Seedling Root Dip and Main Field Treatment on Hirschmanniella mucronata and Rice Yield

Toxicological investigations against rice green leafhopper,Nephotettix virescens(Distant)

Abstract Among nineteen granular formulations evaluated against green leafhopper, thiocyclam hydrogen oxalate, fensulfo‐thion, carbofuran, BPMC, MIPC and monocrotophos possessed good persistent toxicity while thiocyclam hydrogen oxalate, MIPC and BPMC exhibited a better knockdown effect. Of the twenty three spray formulations, phosalone, isofenphos, chlorfenvinphos, triazophos, monocrotophos, carbaryl and MIPC were better for persistent toxicity whereas monocrotophos, malathion, chlorfenvinphos, UC 54229 and phosphamidon showed considerable knockdown effect. Carbosulfan was the best insecticide for seedling root dip treatment and it was also effective in combination with chlorpyriphos. Granular formulations of thiocyclam hydrogen oxalate act on green leafhopper by volatalization from surface of the soil and translocation in the plant system. Utilization of these insecticides in integrated insecticide application methodology has been suggested.

Seedling Root Dip Treatments to Control Gall Midge (GM)

Seedling Root Dip Treatments to Control Gall Midge (GM)

Effects of phenological stage ofSpartina alterniflora transplant culms on stand development

Spartina alterniflora culms dug from a naturally established seedling stand, and from tall- and dwarf-form stands were transplanted on a coarse (Area I) and a fine textured (Area II) substrate of similar elevation. Soil amendment treatments of 122.0 and 244.0 kg ha−2 each of inorganic N, P2O and K2O and a commercial root dip treatment were applied to the three culm types. The seedling culm type was the superior transplant material in terms of initial survival, rapid tiller production and below-ground biomass accumulation. The dwarf- and tall-form culms were from more mature stands and did not have a comparable flush of growth. Although initial transplant survival was slightly less in Area II, vegetative growth of all three culm types was more rapid than on the coarse textured substrate. Increased water holding capacity and nutrient availability of the fine textured substrate probably reduced osmotic stress between tidal inundation in the summer months and promoted growth throughout the year. At 16-mo postplanting, only the seedling culms were similar to natural stands in the vicinity in terms of culm density. Root: shoot ratios of less than unity for all culm types indicated the stand was still developing.

Efficacy of Granular Insecticides Applied in Paddy Water on Yellow Stem Borer Control in Rice at Tillering Stage, 1980

Abstract This field experiment was conducted with 8 tretments in 3 replications in randomized block design at the Tamil Nadu Agricultural Urivesity, Coimbatore, India. Six granular insecticides were tested in field plots of 20 m2 each. Maximum protection plots were planted with seedlings given seedling root dip treatment with chlorpyriphos 0.02% for 12 hr and the remainder of the plots were planted with seedlings not given root dip treatment. Test granules were applied at 1.5 kg ai/ha and quinalphos at 1.0 kg ai/ha at 19 days after planting (DAT). Stem borer infestation was recorded as number of tillers showing “deadhearts” in 10 hills selected at random in each plot 30 DAT and % deadhearts worked out.

Control of Rice Thrips, Baliothrips biformis with Seedling Root Dip Treatments

Control of Rice Thrips, Baliothrips biformis with Seedling Root Dip Treatments

Control of Rice Leafhopper, Nephotettix virescens (Dist.) with Insecticides in three Methods of Application

Two field experiments were conducted during 1972-73 and 1973-74 to test the efficacy of twelve insecticides as foliar sprays against rice leafhopper, Nephotettix virescen (Dist). Fenitrothion (0.05%). monocrotophos (0.10%), parathion (0.5%), dicrotophos (0.5%). and orthone (0.30%) were found to be more toxic to the leafhopper. Two field experiments, one for seed treatment and the other for seedling root dip treatment with systemic insecticides were also conducted for the control of the post during 1973-74. In both sead and seedling root dip treatments, methyl demeton (0.005%) and orthene (0.30%) were highly effective.

Effect of homoeopathic drugs on plant viruses.

Studies on the determination of antiviral activity of 6 homoeopathic drugs in vitro and in vivo, against 3 papaya viruses and cucumber mosaic virus were conducted. Higher degrees of virus inhibition were observed when the drugs were either mixed with infective saps before inoculation on test plants or the drug was administered in hosts by root–dip treatment 7 days before inoculation. The drugs had more effect on the systemic hosts than that of the local lesion host. No phytotoxic effects were observed in plants after the treatment.