Spotted Stem Borer Research Articles

Reviews on the Strategies Employed in Implementing the 'Push-Pull' Approach to Integrated Pest Management

Abstract: For small-holder maize farmers in Africa, the push-pull strategy is outlined as an alternate ecological management technique to traditional insecticide-based integrated pest management for the control of the spotted stem borer Chilo partellus and the autumn armyworm Spodoptera frugiperda. Push-Pull Technology (abbreviated PPT) is a unique integrated pest management method developed by the International Centre of Insect Physiology and Ecology (ICIPE) and its partners. This tactic involves influencing the behavior of natural enemies and insect pests by strategically deploying stimuli that make the resource under protection unappealing or inappropriate for the pests (the "push"). Additionally, the pests are drawn to an alluring source the pull, from which they are then eliminated

Comparative Study of Synthetic Insecticides with Biopesticides against Spotted Stem Borer, Chilo partellus (Swinhoe) on Maize (Zea mays L.)

Spotted stem borer, Chilo partellus (Lepidoptera: Pyralidae) regarded as one of the most significant and prevalent insect pests of maize and its mystic aspect of feeding makes it challenging to control. Hence current study aims to evaluate comparative study of synthetic insecticides with biopesticides against Chilo partellus. Eight treatments viz., azadirachtin 10,000ppm, neem oil 3%, karanj oil 3%, neem oil 3% + imidacloprid 17.5%SL, karanj oil 3% + imidacloprid 17.5%SL, imidacloprid 17.5%SL, spinosad 45%SC and untreated control were tested under field condition in randomized block design with three replications. Among the treatments, lowest larval population of Chilo partellus per plant were recorded in karanj oil 3% + imidacloprid 17.5%SL (1.99) followed by neem oil 3% + imidacloprid 17.5%SL (2.42), imidacloprid 17.5%SL (2.71), spinosad 45%SC (3.17), neem oil 3% (3.73), karanj oil 3% (3.95) and azadirachtin 10,000ppm (4.44) were found superior over the untreated control (7.24). The highest yield was recorded in karanj oil 3% + imidacloprid 17.5%SL with 39.20 q/hectare and most economic treatment was imidacloprid 17.5%SL with highest cost benefit ratio (1:2.2). The lowest cost benefit ratio was recorded in untreated control (1:1.4).

Lipid composition differs in diapause and nondiapause states of spotted stem borer, Chilo partellus

Spotted stem borer, Chilo partellus, undergoes larval diapause (hibernation and aestivation), and depends on the food reserve accumulated during feeding stage for its survival. Lipids are the primary source of energy during diapause, and essential for different cellular, biochemical and physiological functions. However, there is no information on lipid and lipophilic compound contents during different stages of hibernation, aestivation and nondiapause in C. partellus. Thus, we compared the concentration and composition of lipids in pre-diapause, diapause and post-diapause stages of hibernation and aestivation with nondiapause stages of C. partellus. The studies revealed significant differences in total lipids and various lipophilic compounds during different stages of diapause as compared to nondiapause C. partellus. The total lipids were significantly lower during diapause stage of aestivation and hibernation as compared to nondiapause larvae. Further, the linoleic acid, Methyl 3-methoxytetradecanoate, and l-(+)-Ascorbic acid 2,6-dihexadecanoate were significantly lower, and oleic and palmitoleic acids greater during pre-diapause and diapause stages of hibernation and aestivation as compared to nondiapause larvae. The cholesterol content was significantly greater during pre-diapause stage of hibernation, and diapause and post-diapause stages of aestivation as compared to nondiapause stages. The unsaturation ratio was significantly higher in the pre-diapause and diapause stages and lower in post-diapause stage of aestivation than the hibernation and nondiapause states. This study provides insights on differential lipid profiles during different phases of diapause, which could be useful for further understanding biochemical and physiological cross-talk, and develop target-specific technologies for the management of C. partellus.

Hibernation induced biochemical changes in spotted stem borer <i>Chilo partellus</i>

Spotted stem borer, Chilo partellus (Swinhoe) is one of the most destructive pests of sorghum and maize, and undergoes hibernation during harsh winters. Several aspects of diapause have been studied, however metabolic and biochemical processes underlying hibernation remain poorly understood in C. partellus. Present studies carried out during 2020–22 at ICAR-Indian Agricultural Research Institute, New Delhi deciphered the variations in nutritional biochemicals, digestive and stress enzymes, cryoprotectants in the hibernation and in non-hibernating larvae and pupae of C. partellus. These studies revealed that the total lipids and proteins were significantly greater during pre- hibernation and hibernation, and sugars were greater in non-hibernation larvae. Glycogen content was greater in pre- hibernation, and sorbitol, trehalose and glucitol contents consistently increased from pre-hibernation to hibernation stages in comparison to non-hibernation larvae of C. partellus. Total sugar and sorbitol contents decreased, while total protein, trehalose and glucitol increased, in post-hibernation than the non-hibernation pupae of C. partellus. Activities of ascorbic acid, lipid peroxidation, total antioxidant, catalase and superoxide dismutase were significantly greater during hibernation followed by pre-hibernation as compared to non-hibernation larvae, while the reverse was the case with protease activity. Ascorbic acid, lipid peroxidation, total antioxidant and catalase activities were greater in post-hibernation as compared to non-hibernation pupae of C. partellus. However, glutathione S-transferase activity was greater in the non-hibernation larvae and pupae than the hibernation larvae and post-hibernation pupae of C. partellus. These findings can be useful to design newer management strategies keeping in view the weak links like the state of nutritional metabolism and oxidative stress tolerance due to diapause in C. partellus.

Field Efficacy of Insecticides and Botanicals for Management of Spotted Stem Borer (Chilo partellus) on Maize (Zea mays L.)

The field investigation was conducted during the Kharif 2021 and 2022 at the Central Research Farm (CRF) of Naini Agriculture Institute, Sam Higginbottom University of Agriculture Technology and Sciences, Prayagraj, Uttar Pradesh, India. The experiment was organized in a Randomized Block Design, comprising twelve treatments, each replicated thrice. The treatments included Chlorantraniliprole 18.5 SC (0.5 ml/l), Lambda cyhalothrin 2.5% EC (10 ml/l), Thiamethoxam 25 WG (10 gm/kg), Profenophos 50 EC (3ml/l), Cypermethrin 10 EC (4 ml/l), Neem oil 3% (30 ml/l), Verticillium lecani 1.15 WP (15 ml/l), Spinosad 45 SC (0.3 ml/l), Emamectin benzoate 5 SG (0.40 gm/kg), Indoxacarb 15.8 EC (1.5 ml/l), NSKE 5% (50 ml/l), and control plot. The results showed that the lowest population of stem borer was identified with Emamectin benzoate 5 SG (2.24), (0.82) and (3.61), (2.33) followed by Chlorantraniliprole 18.5 SC (2.41), (1.01) and (3.82), (2.46) during the Kharif seasons of both 2021 and 2022. Neem oil 3%, NSKE 5% were found to be least effective over the other treatments and is significantly superior over the control.

Progress in developing and deploying drought-tolerant and insect-pest resistant climate-resilient droughtTEGO® and TELA® maize varieties

Currently, drought stress and associated insect-pest damage pose a huge threat to food and nutrition security for over 300 million people in Africa who depend on maize as their main food source. Recurrent drought events cause an annual 17 to 25 percent yield loss of maize in Africa [1]. Compounding the impact of drought, is the ravaging effect of insect-pests infestation on maize production, especially for pests whose population pressure is highly triggered under dry conditions. The crop under weakened conditions created by drought stress and pest effect further becomes constrained biologically and physiologically, thus limiting the crop’s ability to use already limited water and nutrients from the soil. The major insect pests of maize in Africa are fall armyworm (FAW, Spodoptera frugiperda) and various stem borer species (Spotted stem borer (Chilo partellus), African stem borer (Busseola fusca), and the pink stemborer (Sesamia Calamistis). For instance, in Kenya alone, an average of 13 percent or 400,000 tons of maize is lost to stem borer, which is equivalent to the annual maize imports, valued at USD 90 million [2]. The FAW, a transboundary pest, first observed in the continent in 2016, is a maize pandemic that if not controlled adequately, could potentially destroy up to 20 million metric tons of maize annually, enough to feed 100 million people in Africa [3].

Spotted stem borer, Chilo partellus (Swinhoe) infestation in corn fields of Türkiye

Spotted stem borer, Chilo partellus (Swinhoe) infestation in corn fields of Türkiye

Evaluate the Efficacy of Different Biopesticides with Imidacloprid against Maize Spotted Stem Borer (Chilo partellus swinhoe) on maize under field conditions

An experiment of Maize stem borer Chilo partellus using different Bio-pesticides in field condition was carried out during Kharif 2022-2023 at central Research field SHUATS Prayagraj, UP., India. The management of Maize stem borer was done using 8 different treatments and benefit cost ratios of all the treatments were calculated. Total two sprays were applied to protect the crop from Chilo partellus using randomized block design with three replications. The observations of Chilo partellus 24 hours before (Pre- treatment) and 3rd, 7th and 14th day after spraying (post-treatment) were recorded for computing the percent of larval population reduction. The data were subjected to statistical analysis after appropriate transformation for interpretation. The treatment with recommended insecticide cost benefit ratio and yield is in Imidacloprid 200 SL (T7) (1:5.01) (40.49q/ha) followed by Beauveria bassiana (2 CFU×108 ml) (T1) (1:4.53) (38.45q/ha), Bacillus thuringiensis (108 CFU/ml) (T4) (1:4.41) (37.7q/ha), Metarhizium anisopliae (T2) (1:4.20) (36.79q/ha), NPV (T3) (1:4.03) (35.98q/ha), NSKE @ 5% (T5) (1:3.97) (34.6q/ha), Azadirachtin 0.03% (T6) (1:3.85) (33.57q/ha) Lest monetary return and yieldwas obtained with control (T0) (1:3.52) (28.4q/ha).

Electrophysiological and Behavioral Responses of Spotted Stem Borer, Chilo partellus, to Sex Pheromone Components and Their Blends

The spotted stem borer, Chilo partellus (Lepidoptera: Crambidae) is the major insect pest of maize and sorghum crops during the rainy season. The pheromone released by adult virgin females has been reported to consist of (Z)-11-hexadecenal (Z11-16:Ald) as major component and (Z)-11-hexadecenol (Z11-16OH) as minor component. The latter has been reported to reduce the efficiency of major component to trap the male moths. We studied the electrophysiological and behavioral response of male C. partellus moths to Z11-16:Ald, Z11-16OH, their E-isomers (E)-11-hexadecenal and (E)-11-hexadecen-1-ol, and blends. Electroantennogram (EAG) studies revealed that male C. partellus antennae elicited significantly greater responses to both (Z)-11-hexadecenal and (Z)-11-hexadecenol compared to their respective E-isomers. Behavioral response studies through wind tunnel and cage bioassay showed that blends of Z11-16:Ald and Z11-16OH in the proportion of 100:100 and 100:95 elicited significantly higher responses from male moths. The attractiveness of these pheromone components and blends in field also revealed that traps baited with 100:100 proportion was most effective. Our studies clearly showed that the minor alcohol component Z11-16OH is important for enhancing attractiveness of the pheromone and provides a more effective blend for monitoring of this pest.

Diapause in <i>Chilo partellus</i>: A Research Journey

Spotted stem borer, Chilo partellus (Swinhoe) is one of the most widely distributed pests of coarse cereals, causing 18 to 25% yield losses in Asia and Africa. The larvae of C. partellus pass through hibernation under North Indian and aestivation under South Indian conditions. Although diapause helps C. partellus in adapting under unfavorable conditions, there is 17.2 to 28.3% and 7.0 to 33.7% population sacrifice during hibernation and aestivation, respectively. The population heterogeneity in C. partellus could be due to hibernation or aestivation, wherein the models, Ikemoto & Takai (linear), and Lactin-1 and Lactin-2 (non-linear) are efficient for describing temperature dependent development and estimating the temperature thresholds of diapausing larvae. This helps in predicting the occurrence, seasonal emergence, number of generations and population dynamics of the pest. Diapause results in differential regulation of hormonal and biochemical profiles, impose deleterious effects on the post-diapause development, reproductive physiology and population growth of C. partellus. The diapause, developmental and morphometric traits in C. partellus are governed by overdominance gene effects which mainly depend on parental diapause history. Four different biotypes of C. partellus viz., Hisar, Hyderabad, Parbhani and Coimbatore exist in India, suggesting that sorghum and maize genotypes need to be tested against these four populations to identify stable sources of resistance. The whole genome sequencing will be useful for understanding mode of action of different insecticides, mechanisms of detoxification and designing target-specific insecticides to develop appropriate strategies to manage C. partellus for sustainable crop production. The temporal distribution of mating systems among adults of diapause, non-diapause and/or ecologically diverse populations, and their behavioral and physiological consequences under a given demographic framework could be rewarding, and aid in to devising appropriate mating disruption techniques to suppress C. partellus population.

Lifetables of <i>Chilo partellus</i> (Swinhoe) infesting rabi sorghum

This study on the sorghum spotted stem borer Chilo partellus (Swinhoe) was conducted at the Post Graduate Experimental Field of Department of Agricultural Entomology, College of Agriculture, Campus Latur during 2020-21. The results revealed that C. partellus passed through three generations on rabi sorghum. The mortality in early instar larval stage was observed due to unknown reasons (17.24, 19.05 and 14.51%, respectively), Callibracon sp. (4.16, 11.76 and 8.33%, respectively) and Cotesia flavipes (8.69, 6.67 and 9.65%, respectively) in its first, second and third generations. The mortality in late instar larvae was also found owing to unknown reasons (19.4, 14.28, and 11.36%, respectively), Callibracon sp. (11.76, 12.49 and 11.43%, respectively) and C. flavipes (13.33, 14.28 and 10.26%, respectively) in the first, second and third generations. In first generation, the pupal mortality was not observed, and when noticed it was due to unknown reasons (11.11 and 16.12%, respectively) during second and third generations. The trend index and generation survival were 1.44 and 0.44; 1.48 and 0.38 and; 0 and 0.42 during first, second and third generations, respectively.

Stress-induced defense in sorghum in response to attack by the spotted stem borer, Chilo partellus (Swinhoe)

Stress-induced defense in sorghum in response to attack by the spotted stem borer, Chilo partellus (Swinhoe)

Invasive maize spotted stem borer Chilo partellus Swinhoe 1885 (Lepidoptera: Crambidae) is the dominant pest in maize agro-system in the Mediterranean Region of Turkey

• C. partellus was major stem borer in first crop according to the relative abundances. • The relative abundance of maize stem borers was similar in the second crop maize. • Crop season is fundamental driving factor influencing the distribution of stem borers. The maize spotted stem borer Chilo partellus Swinhoe 1885 (Lepidoptera: Crambidae) was recorded for the first time in Turkey in 2014. This pest is described as invasive, especially in the current climate change dispensation. It is important to investigate the population dynamics of C. partellus for better management practices. We studied the species abundance distribution (SAD) models and some biodiversity indices of three major stem bores, C . partellus , Ostrinia nubilalis and Sesamia nonagrioides as these are the most common and major stem borers of maize in the Mediterranean Region. With the help of light traps, weekly catches of the three major maize stem borers were collected during two maize growing seasons (first cropping and second cropping seasons) in 2018 and 2019. The results showed that C . partellus emerged earlier (April-May) and was very dominant throughout the first cropping season of maize. Ostrinia nubilalis and S . nonagrioides emerged late in June-July, and its population remained low throughout the first cropping season. The population structure of all three stem borers was similar throughout the second cropping season of maize. The relative abundance (RA) of C . partellus was significantly higher than that of O . nubilalis and S . nonagrioides in the first cropping ( p < .0001) when compared to the second cropping season ( p > .05) for both years. In the first cropping season for both years, no SAD model fitted the observed species distribution, although Fisher’s log series was relatively similar. In the second cropping for both years, the geometric series distribution model fitted the observed SAD. The Berger-Parker dominance index was greater for the first cropping season than that of the second, whereas the opposite was true for the Simpson’s evenness and evenness of Pielou. High RA of C . partellus and the geometric series distribution observed in the second cropping are indicative of a possible dominant status of the C . partellus in the Mediterranean Region of Turkey. Our findings indicated that seasonality is a fundamental driving factor influencing the distribution of the three major stem borers of maize in the Mediterranean Region. In addition, the long and warmer winters could be the reason for the dominance of C . partellus as indicated by the diversity indices.

Whole genome sequencing of spotted stem borer, Chilo partellus, reveals multiple genes encoding enzymes for detoxification of insecticides.

Spotted stem borer, Chilo partellus, is the most important constraint for increasing the production and productivity of maize and sorghum, the two major coarse cereals in Asia and Africa. The levels of resistance to this pest in the cultivated germplasm are low to moderate, and hence, farmers have to use insecticides for effective control of this pest. However, there is no information on the detoxification mechanisms in C. partellus, which is one of the constraints for deployment of appropriate insecticides to control this pest. The ability to detoxify insecticides varies across insect populations, and hence, we sequenced different populations of C. partellus to identify and understand detoxification mechanisms to devise appropriate strategies for deployment of different insecticides for controlling this pest. Larval samples were sequenced from three different cohorts of C. partellus using the Illumina HiSeq 2500 platform. The data were subjected to identify putative genes that are involved in detoxification on insecticides in our cohort insect species. These studies resulted in identification of 64 cytochrome P450 genes (CYP450s), and 36 glutathione S-transferases genes (GSTs) encoding metabolic detoxification enzymes, primarily responsible for xenobiotic metabolism in insects. A total of 183 circadian genes with > 80% homolog and 11 olfactory receptor genes that mediate chemical cues were found in the C. partellus genome. Also, target receptors related to insecticide action, 4 acetylcholinesterase (AChE), 14 γ-aminobutyric acid (GABA), and 15 nicotinic acetylcholine (nAChR) receptors were detected. This is the first report of whole genome sequencing of C. partellus useful for understanding mode of action of different insecticides, and mechanisms of detoxification and designing target-specific insecticides to develop appropriate strategies to control C. partellus for sustainable crop production.

Performance of Bt maize event MON810 in controlling maize stem borers Chilo partellus and Busseola fusca in Uganda

Stem borers are major insect pests of maize in Uganda. A study was conducted in 2014–2016 to assess the performance of Bt hybrids expressing Cry1Ab (event MON810) against the two major stem borer species in Uganda – the African stem borer (Busseola fusca) and the spotted stem borer (Chilo partellus) – under artificial infestation. The study comprised 14 non-commercialized hybrids, including seven pairs of Bt and non-Bt hybrids (isolines), three non-Bt commercial hybrids and a conventional stem borer resistant check. All stem borer damage parameters (leaf damage, number of internodes tunneled and tunnel length) were generally significantly lower in Bt hybrids than in their isolines, the conventionally resistant hybrid, and local commercial hybrids. Mean yields were significantly higher by 29.4–80.5% in the Bt hybrids than in the other three categories of non-Bt hybrids. This study demonstrated that Bt maize expressing Cry1Ab protects against leaf damage and can limit entry of stem borers into the stems of maize plants, resulting in higher yield than in the non-transgenic hybrids. Thus, Bt maize has potential to contribute to the overall management package of stem borers in Uganda.

Evaluation of Aqueous Extracts of Neem kernels and leaves for the control of spotted stem borer Chilo partellus Swinhoe, in sorghum at New Halfa, Sudan

A field experiment was conducted to study the effect of different concentrations of aqueous extracts of Neem kernels (NK) and Neem leaves (NL) on the incidence and damage of spotted stem borer in sorghum during 2011/12-2012/13 seasons at New Halfa Research Station farm. Sorghum variety Tabat was used. The experiment was laid in a RCB design with four replicates and seven treatments. These were: NK at kg/ 30 and 40 Liter of water, NL at kg/15 and 20 Liter of water, Furadan10% G at 15kg/F and Malathion 57% EC at 2L/F as standard and the untreated control. A liquid soap was added to Neem treatments as an emulsifying agent. Three sprayings were applied using knapsack sprayer starting two weeks after emergence with 10 days intervals. Data on percent deadheart, percent leaf damage plants, percent stem tunneling, number of borer holes per plant and grain yield were recorded. Results indicated that, all treatments were highly significantly (P&gt;0.001) reduced stem borer damage and increased the grain yield compared to the untreated one. NK at kg/ 40 L of water was the best in reducing stem borer damage and increasing grain yield comparable to the standard treatment Furadan 10% G at 15 Kg/F.

Influence of prevailing weather parameters on population dynamics of spotted stem borer, Chilo partellus (Swinhoe) and its natural enemies on maize in Haryana

&#x0D; The experiment was conducted at CCS Haryana Agricultural University Regional Research Station, Karnal to ascertain the influence of prevailing meteorological parameters on population dynamics of Chilo partellus and its natural enemies on maize during Kharif, 2017. Maximum oviposition (0.75 egg masses per plant) was recorded during 28th standard meteorological week (SMW) whereas larval population was at peak during 31st SMW (3.8 larvae per plant). Cumulative (47.5%) and fresh plant infestation (11.5%) were maximum during 34th and 28th SMW, respectively. Maximum egg parasitisation (6.53%) by Trichogramma sp. and larval parasitisation (31.64%) by Cotesia flavipes was recorded during 28th and 33rd SMW, respectively. Changes in pest population were correlated and regressed with weather parameters. Egg and larval populations of C. partellus and parasitisation by Trichogramma sp. exhibited significant positive correlation with average minimum temperature whereas C. flavipes exhibited significant negative correlation with average maximum temperature (r = -0.741) and highly significant positive correlation with evening relative humidity (r = 0.695). Plant infestation and dead heart formation were significantly correlated with average minimum temperature and non-significantly correlated with all other weather parameters. The multiple linear regression analysis explained the variability due to various weather parameters. This information can be utilised while formulating integrated management tactics against this pest.&#x0D;

Efficacy of Insecticides Against Sorghum Spotted Stem Borer &lt;i&gt;Chilo partellus&lt;/i&gt; (Swinhoe)

Efficacy of insecticides against spotted stem borer Chilo partellus (swinhoe) in sorghum was studied at the institutional farm, Regional Agricultural Research Station, Nandyal, Andhra Pradesh during rabi 2016-17 and 2017-18. Deadhearts were observed to be less with spinosad (4.0%) followed by carbofuran 3G (4.10%), chlorantraniliprole 18.5SC (4.95) and chlorantraniliprole 0.4G (4.86) applied at 25 days after sowing. The least infestation at 40 days after sowing was observed with chlorantraniliprole 18.5SC (6.2%), spinosad 45SC (7.0%), chlorantraniliprole 0.4G (7.3%) and carbofuran 3G @ 10 kg/ ha (8.0%). Lesser number of larvae in the stem tunnel were observed with chlorantraniliprole 18.5SC/0.4G, spinosad, carbofuran 3G, phorate 10G and flubendiamide. The incremental benefit cost ratio was maximum with carbofuran 3G (5.2:1), followed by chlorantraniliprole 0.4G (4.8:1) and chlorantraniliprole 18.5SC (4.2:1).

Biological and biochemical diversity in different biotypes of spotted stem borer, Chilo partellus (Swinhoe) in India

Because of variation in incidence and severity of damage by Chilo partellus (Swinhoe) in different geographical regions, it is difficult to identify stable sources of resistance against this pest. Therefore, the present studies were undertaken on biological attributes (damage in resistant and susceptible genotypes, survival and development) and biochemical profiles (amino acids and lipophilic compound) of C. partellus populations from eight geographical regions to understand it’s population structure in India. There was a significant variation in biological attributes and biochemical profiles of C. partellus populations from different geographical regions. Based on virulence and biological attributes, similarity index placed the C. partellus populations in five groups. Likewise, lipophilic and amino acid profiling also placed the C. partellus populations in five groups. However, the different clusters based on biological and biochemical attributes did not include populations from the same regions. Similarity index based on virulence, biological attributes, and amino acids and lipophilic profiles placed the C. partellus populations in six groups. The C. partellus populations from Hisar, Hyderabad, Parbhani and Coimbatore were distinct from each other, indicating that there are four biotypes of C. partellus in India. The results suggested that sorghum and maize genotypes need to be tested against these four populations to identify stable sources of resistance. However, there is a need for further studies to establish the restriction in gene flow through molecular approaches across geographical regions to establish the distinctiveness of different biotypes of C. partellus in India.

Toxicological risk assessment of some commonly used insecticides on Cotesia flavipes, a larval parasitoid of the spotted stem borer Chilo partellus.

Cotesia flavipes Cameron is an important larval parasitoid exploited for the control of the spotted stem borer, Chilo partellus (Swinhoe). Several studies have evaluated the toxic effects of insecticides on C. partellus, however, little is known about non-target effects of insecticides on this parasitoid, when used to control C. partellus. This laboratory study evaluated the lethal and sublethal effects of twelve insecticides on C. flavipes. Residual toxicity tests showed that organophosphates (chlorpyrifos, triazophos and profenofos) exhibited highest contact toxicity to C. flavipes adults with a LC50 range from 0.63 to 1.05 mg a.i/l, while neonicotinoids (nitenpyram, acetamiprid and imidacloprid) were less toxic to C. flavipes with a LC50 range from 1.27 to 139.48 mg a.i/l. Sugar-insecticide feeding bioassays showed that organophosphates, pyrethroids (cypermethrin, bifenthrin and lambda-cyhalothrin) and carbamates (thiodicarb, carbaryl and methomyl) were highly toxic to C. flavipes adults and caused 100% mortality at 48 h of exposure, while imidacloprid caused 66% mortality at 48 h of exposure. Risk quotient analysis showed that among all tested insecticides, imidacloprid and acetamiprid were less toxic to C. flavipes adults with a risk quotient value of 0.88 and 1.6, respectively. Furthermore, exposure of immature C. flavipes through their host bodies significantly decreased the parasitism rate at their F1 and F2 generations. Risk quotient analysis of insecticides indicated that imidacloprid and acetamiprid were the least toxic to C. flavipes. This study provides important information that will be used in incorporating the most suitable insecticides in integrated pest management programs with reduced negative impacts on non-target beneficial arthropods.