Comparative biology and morphometrics of pink bollworm, Pectinophora gossypiella (Saunders) on Bt cotton and alternate malvaceous hosts S. Rakhesh, S. G. Hanchinal, M. Bheemanna, A. C. Hosamani, J. M. Nidagundi, S. Deshmukh Sharanabasappa Scientific Reports, 2026 The comparative biology of pink bollworm (PBW) on Bt cotton bolls and fruit pods of malvaceous plants viz., Abutilon indicum, Abutilon hirtum and Abelmoschous ficulneus was investigated under controlled conditions. The incubation time of PBW eggs from different hosts ranged from 2.0 to 4.5 days, which was not differ significantly among treatments. The mean larval duration of all four instars as well as average larval duration of pink bollworm reared on Bt cotton was more as compared to the larvae reared on A. indicum, A. hirtum and A. ficulneus. The average male and female pupal period were longer on Bt cotton. Both adult male and female from Bt cotton lived longer as compared to adults from A. indicum, A. hirtum and A. ficulneus. The weight of the different life stages of the pink bollworm was also more significant when reared on Bt cotton. Similarly, morphometric parameters, including larval body length and width, as well as pupal size and adult body dimensions (including wing expanse), were significantly greater in PBW reared on Bt cotton than on other hosts. Larvae feeding on Bt cotton undergo physiological stress that delays development but allows extended feeding and compensatory growth, resulting in higher weight and longevity. Thus, Bt cotton induces delayed development in Bt tolerant populations, while non-cotton malvaceous hosts support faster but nutritionally inferior development. Thus, the results clearly indicate that the pink bollworm completes its life cycle on malvaceous hosts and this also might be a reason for the off seasonal survival of pink bollworm in cotton growing regions. This study could have implications for crop management strategies for controlling the pink bollworm, that can cause significant damage to cotton crops.
SHELF LIFE STUDIES ON SEMISYNTHETIC DIET FOR BRINJAL SHOOT AND FRUIT BORER LEUCINODES ORBONALIS GUENEE Basavaraj S Kalmath, Bhagyashree, Shivanand Hanchinal, Rachappa Haveri, Lakshmikanth Mariyanna Indian Journal of Entomology, 2026 Brinjal shoot and fruit borer Leucinodes orbonalis Guenee is an important key best of brinjal. In this study the shelf life of standard semisynthetic diet was evaluated for two successive generations of L. orbonalis. The results showed that there was no significance difference with the developmental and reproductive parameters reared on semisynthetic diets stored at different durations (0, 10, 20, 30 and 40 days; in refrigerator at 4oC). The results demonstrated that the semisynthetic diet can be stored at 4°C for up to 40 days without adversely affecting the lifecycle.
Performance of four major egg parasitoids as biocontrol agents against Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) eggs Veena K., Arunkumar Hosamani, Prabhuraj A., Shivanand Hanchinal, Sharanabasappa S. Deshmukh, Adeney de Freitas Bueno, Deeksha M. G. Bulletin of Entomological Research, 2026 Parasitoids are effective biocontrol agents against Spodoptera frugiperda. Here, we studied four egg parasitoids (Trichogramma chilonis, Trichogramma pretiosum, Trichogrammatoidea bactrae, and Telenomus remus) on S. frugiperda eggs under laboratory conditions [25 ± 1 °C, 70 ± 5% RH, 14/10-h (L:D) photoperiod]. Then, Tr. chilonis (the best trichogrammatid species in the laboratory) was studied inside cages (1 m × 1 m) under maize-field conditions. Egg-to-adult periods (days) were recorded among different species, with Te. remus having the longest (10.00 ± 0.89 days) and Tr. bactrae the shortest (7.80 ± 0.66 days) periods. Furthermore, Te. remus exhibited the greatest adult longevity (days) for both males and females, with and without food. Lifespan parasitism under laboratory conditions was the highest for Te. remus (73.60 ± 7.23 eggs), followed by Tr. chilonis (45.40 ± 2.56 eggs) and Tr. pretiosum (42.00 ± 3.70 eggs). Adult emergence (%) was always higher than 90% and the sex ratio was higher than 0.60 for the studied egg parasitoid species. In the cage experiments set up in uncontrolled field conditions, different release densities of Tr. chilonis (50,000, 100,000, and 150,000 parasitoids/ha) were studied. Release densities of 100,000 and 150,0000 parasitoids per hectare were the most effective rates for managing S. frugiperda, with recorded egg parasitism of 71.36% and 72.88%, respectively. These findings provide crucial insights into the biological attributes and parasitism potential of these parasitoids, indicating the optimal release density of 100,000 Tr. chilonis/ha as an integrated pest management strategy against S. frugiperda in maize ecosystems.
Resistance development in pink bollworm (Pectinophora Gossypiella Saunders) against Bt cotton and its’ establishment as mid season pest in India Rishi Kumar, B. V. Bhede, Debashis Paul, N. K. Bhute, Prashant Patil, R. D. Patel, M. V. Variya, S. G. Hanchinal, Poornima V. Matti, Shivaray Navi, Anil Jakhar, Jasjinder Kaur, Roop Singh Meena, Jyoti Rekha Mallick, Satnam Singh, N. Chitra, G Annie Diana Grace, R. K. Kalyan, M. Sivarama Krishna, G. T. Bahere, A. H. Prakash, Y. G. Prasad Scientific Reports, 2025 The pink boll worm now became a menace for sustainable cultivation of Bt cotton in India. Based on the data recorded in unsprayed conditions at 13 different locations of north, central and south cotton growing zone between 2007 and 2023, initiation of green boll damage during later part of the season was observed on Bt cotton genotype during 2009-2014 wherein incidence of PBW already existed on non-Bt genotype. In our research, between 2014 and 2017, the central and southern regions of India experienced a rise in the survival of pink bollworms on Bt cotton surpassing the Economic Threshold Level (ETL) whereas in the north zone PBW incidence started in 2018 at experimental locations. The data validate the initial success of Bt/BG-II cotton in its first ten years (2002-2013) of introduction including pink bollworm, which caused negligible green boll damage (0-1.03%) on Bt/BG-II genotypes, while the incidence on non-Bt genotypes was much higher (2.5-23.01%). Following that, an establishment phase was detected in 2014, confirmed by the equal presence of pink boll worm in BG-II and non-Bt, with minimal infestation differences in BG-II and non-Bt, indicating a larger presence of resistant individuals. Following 2014, the coexistence of PBW in BG-II and non-Bt populations was noted concurrently, with a gradual increase in incidence over ETL beginning in the middle of the season. Farmer's field surveys reported highest number of locations above ETL during 2017 with a decreasing trend both in central and south zone. In the north, infestations were low until 2021, but increased significantly, reaching their highest point in 2023. The emergence and spread of PBW resistance to Bt cotton, facilitated by off-season survival and carryover, poses a substantial threat to the sustainability of BG-II cotton cultivation in India.
Positioning New Pesticide Chemistries in the Management of Pod Fly, Melanagromyza obtusa Malloch (Diptera: Agromyzidae) in Pigeonpea V. Rachappa, Saleemali Kannihalli, Pandit S. Rathod, N. Sushila, S.G. Hanchinal Legume Research, 2025 Background: Pigeonpea is an important pulse-cum-grain legume crop of India. Major constraint in its production is the insects damage. Pod fly, Melanagromyza obtusa is of regular occurrence in South and Central India causing yield loss to the tune of 60 to 80 per cent particularly in late maturing pigeonpea crop. Due to its feeding habit as an internal borer, cultural, biological and mechanical methods are ineffective in reducing the damage due to pod fly and insecticides play a paramount role in managing their population under field conditions. Hence, present study have been aimed to evaluate the efficacy of different new pesticide chemistries against pod fly in pigeon pea ecosystem. Method: Two field experiments were conducted during Kharif 2019 and 2020 in RCBD using pigeonpea cv. GRG 811 with 14 treatments replicated twice. Two sprays were imposed at 15 days interval initiating from pod initiation stage. At maturity, number of damaged pods were recorded and expressed as percentage. Grain yield was recorded and benefit cost ratio was also worked out. Results: Among the screened insecticides, fipronil 4+thiamethoxam 4 SC @ 40+40 g a.i./ha followed by thiamethoxam 25 WG @ 50 g a.i./ha and fipronil 40+imidacloprid 40 WG @ 160+160 g a.i./ha provided better control of pod fly in terms of reduction in pod damage (69.54, 62.13 and 62.57%) and seed damage (72.51, 71.35 and 70.39%) respectively over untreated check. The average grain yield of 1577 kg/ha was highest in fipronil 4+thiamethoxam 4 SC @ 40+40 g a.i./ha followed by fipronil 40+imidacloprid 40 WG @ 160+160 g a.i./ha (1555.5 kg/ha) and thiamethoxam 25 WG @ 50 g a.i./ha (1536.5 kg/ha). Whereas, B: C was higher in fipronil 4+thiamethoxam 4 SC @ 40+40 g a.i./ha (2.84) and thiamethoxam 25 WG @ 50 g a.i./ha (2.83). Therefore these insecticides can be used for effective management of pod fly.
Bioefficacy of S1812 10% EC, Prempt 20% EC and admiral 10% EC against Okra insect pest complex under irrigated conditions Pestology, 2006
Bio-efficacy of emamectin benzoate (proclaim) 5% SG against cotton bollworm complex Pestology, 2005
Bio-efficacy of Emamectin benzoate (Proclaim) 5% SG against Okra fruit borers Pestology, 2005
Fenpropathrin (Meothrin) 30 EC: An ideal insecticide for Chilli (Capsicum annuum L.) pest management Pestology, 2005
Bioefficacy of bifenthrin (Talstar) 10 EC against Chilli insect pests in irrigated ecosystem Pestology, 2005
RECENT SCHOLAR PUBLICATIONS
The coexistence of a new species, Pexicopia tungabhadrai and Pectinophora gossypiella , on Indian mallow ( Abutilon indicum L.) SG Hanchinal, S Gaddanakeri, SV Sajjanar, JM Nidagundi International Journal of Tropical Insect Science, 1-10 , 2026 2026
Genetic Analysis of Heterosis for Yield and Fibre Quality Traits in Cotton (Gossypium hirsutum L.) VC Raghavendra, JM Nidagundi, PH Kuchanur, VV Kulkarni, ... Journal of Advances in Biology & Biotechnology 29 (4), 127-134 , 2026 2026
Comparative biology and morphometrics of pink bollworm, Pectinophora gossypiella (Saunders) on Bt cotton and alternate malvaceous hosts S Rakhesh, SG Hanchinal, M Bheemanna, AC Hosamani, JM Nidagundi, ... Scientific Reports , 2026 2026
Geographic Information System to Study the Spatial Distribution of Pigeonpea Flower Webber, Maruca vitrata (Geyer)(Lepidoptera: Pyralidae) and Leaf Webber, Grapholita critica … A Prabhuraj, RS Patil, NL Rajesh, SG Hanchinal Agricultural Sciences: Techniques and Innovations Vol. 7, 151-164 , 2026 2026
Performance of four major egg parasitoids as biocontrol agents against Spodoptera frugiperda (JE Smith)(Lepidoptera: Noctuidae) eggs K Veena, A Hosamani, A Prabhuraj, S Hanchinal, SS Deshmukh, ... Bulletin of entomological research 116 (1), 83-89 , 2026 2026
Shelf Life Studies on Semisynthetic Diet for Brinjal Shoot and Fruit Borer Leucinodes orbonalis Guenee BS Kalmath, S Hanchinal, R Haveri, L Mariyanna Indian Journal of Entomology, 607-610 , 2026 2026
Dissipation kinetics and dietary safety assessment of imidacloprid in moringa pod and leaf using LC-MS/MS NV Addi, P Aralimarad, S Mahato, SG Hanchinal, J Bedar, S Gouda, ... Journal of Food Composition and Analysis, 108133 , 2025 2025 Citations: 1
Understanding resistance mechanisms in crop wild relatives (CWRs) of pigeonpea ( Cajanus cajan L.) against pod borer Helicoverpa armigera (Hub.) A Karrem, RV Haveri, K Yogendra, A Prabhuraj, S Hanchinal, A Kalyan, ... Genetic Resources and Crop Evolution 72 (6), 7577-7597 , 2025 2025 Citations: 6
Correction: Resistance development in pink bollworm (Pectinophora Gossypiella Saunders) against Bt cotton and its’ establishment as mid season pest in India R Kumar, BV Bhede, D Paul, NK Bhute, P Patil, RD Patel, MV Variya, ... Scientific Reports 15, 23562 , 2025 2025
Positioning New Pesticide Chemistries in the Management of Pod Fly, Melanagromyza obtusa Malloch (Diptera: Agromyzidae) in Pigeonpea V Rachappa, S Kannihalli, PS Rathod, N Sushila, SG Hanchinal Legume Research-An International Journal 1, 5 , 2025 2025
Resistance development in pink bollworm ( Pectinophora Gossypiella Saunders ) against Bt cotton and its’ establishment as mid season pest in India R Kumar, BV Bhede, D Paul, NK Bhute, P Patil, RD Patel, MV Variya, ... Scientific Reports 15 (1), 7012 , 2025 2025 Citations: 13
Validation and multiresidue analysis of pesticides in seed, oil and cake of groundnut using triple quadrupole LC-MS/MS along with uncertainty analysis and risk assessment P Aralimarad, J Bedar, S Mahato, SN Rao, N Naik, S Hanchinal, ... Microchemical Journal 209, 112516 , 2025 2025 Citations: 7
Bioefficacy of different insecticides on pink bollworm against Bt cotton S RAKHESH, SG HANCHINAL, JM NIDAGUNDI, JS VIJAYKUMAR Journal of Farm Sciences 37 (03), 240-245 , 2024 2024
Bioefficacy of various insecticides on major sucking pests of okra S Rakhesh, SG Hanchinal, SV Akarsh, ST Mahantesh Journal of Entomological Research 48 (4), 481-485 , 2024 2024 Citations: 1
Simultaneous determination of multi-class pesticide residues in solanaceous vegetables and selected fruits using LC-MS/MS and potential impact on consumer health with … P Aralimarad, J Bedar, S Mahato, S Hanchinal, N Naik, A Gavai, ... 2024 Citations: 1
EVALUATION OF MATING DISRUPTION TECHNIQUE, CREMIT-BSFB AGAINST BRINJAL SHOOT AND FRUIT BORER, LEUCINODES ORBONALIS (LEPIDOPTERA: CRAMBIDAE). TP Chandana, N Sushila, AG Sreenivas, SG Hanchinal, H Sharanagouda, ... Biochemical & Cellular Archives , 2024 2024 Citations: 1
Combining ability and multiple parent‐based approach to derive simultaneous transgressive segregants for multiple traits in cotton ( Gossypium hirsutum L.) JM Nidagundi, AA Hugar, Revanasiddayya, V Korappala, K Shiva, S Patil, ... Plant Breeding 143 (5), 650-665 , 2024 2024 Citations: 1
Comparison and Evaluation of Bagged and Structured Refugia against Cotton Bollworms SG Hanchinal, JM Nidagundi Journal of Advances in Biology & Biotechnology 27 (9), 889-897 , 2024 2024
Optimizing Insecticide Application: Evaluating Frequency and Timing for Effective Management of Pink Bollworm Infestation S Rakhesh, SG Hanchinal, M Bheemanna, A Hosamani, JM Nidagundi Asian Research Journal of Agriculture 17 (4), 72-81 , 2024 2024
Fall armyworm, Spodoptera frugiperda (JE Smith, 1797) may not be a major threat on maize in South India: a revelation through its life table studies P Aralimarad, BB Riyana, P Katti, S Hanchinal, YS Amaresh Journal of the Entomological Research Society 26 (2), 209-224 , 2024 2024 Citations: 2
MOST CITED SCHOLAR PUBLICATIONS
Population dynamics of mealybug, Phenacoccus solenopsis Tinsley and it's natural enemies on Bt cotton. SG Hanchinal, BV Patil, M Bheemanna, AC and Hosamani Karnataka Journal of Agricultural Sciences 23 (1), 137-139 , 2010 2010 Citations: 63
Bio-efficacy of emamectin benzoate (Proclaim) 5% SG against okra fruit borers M Bheemanna, BV Patil, SG Hanchinal, AC Hosamani, N Kengegowda Pestology 29 (2), 14-16 , 2005 2005 Citations: 37
Comparative biology of pink bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae) on different hosts SHANDRVB SHRINIVAS, A.G SREENIVAS, S.G HANCHINAL Journal of Entomology and Zoology Studies 7 (1), 1053-1060 , 2019 2019 Citations: 31
Comparative performance and economics of bollgaurd-II Bt cotton under irrigated conditions M Bheemanna, BV Patil, SG Hanchinal, ACHAB Bansi Journal of Cotton Research and Development 22 (1), 118-121 , 2008 2008 Citations: 28
SPLAT-PBW: An eco-friendly, cost-effective mating disruption tool for the management of pink bollworm on cotton PR Sreenivas, A G, Markandeya, G, Harischandra Naik R, Usha, S G, Hanchinal ... Crop Protection 149, 105784 , 2021 2021 Citations: 25
Pink bollworm, Pectinophora gossypiella (Saunders) management strategy, dissemination and impact assessment in India VS Nagrare, BB Fand, R Kumar, VCB Naik, SP Gawande, SS Patil, ... Crop Protection 174, 106424 , 2023 2023 Citations: 24
Management of sucking insect pest complex of Bt cotton by using dinotefuran–a 3rd generation neonicotinoid molecule AG Sreenivas, S Nadagoud, SG Hanchinal, M Bheemanna, ... Cotton Research and Development Association (CRDA) , 2015 2015 Citations: 23
Incidence of invasive mealybug (Phenacoccus solenopsis Tinsley) on cotton SG Hanchinal, BV Patil, K Basavanagoud, A Nagangoud, DP Biradar Karnataka J.Agric.Sci. 24 (2), 143-145. , 2011 2011 Citations: 19
Effect of intercropping on incidence of mite and thrips in chilli. MANJUNATHA, M., HANCHINAL, S.G. AND KULKARNI, S.V. Karnataka Journal of Agricultural Sciences 14 (2), 493-495 , 2001 2001 Citations: 18
Evaluation of different mass trapping and mating disruption tools against pink bollworm, Pectinophora gossypiella (Saunders)(Lepidoptera: Gelechiidae) in Bt cotton ecosystem AG Shrinivas, SG Hanchinal, S Hurali, RV Beldhadi 2019 Citations: 15
Evaluation of Newer Insecticides for the Management of Brinjal Shoot and Fruit Borer Leucinodes orbonalis (Guenee) (Lepidoptera: Crambidae) ACHANDJMN M. SHRIDHARA, S.G. HANCHINAL, A.G. SREENIVAS Int.J.Curr.Microbiol.App.Sci 8 (3), 2582-2592 , 2019 2019 Citations: 14
Bioefficacy of insecticides against mirid bug, Creontiades biseratense (Distant) in irrigated Bt cotton. M Bheemanna, AC Hosamani, SG Hanchinal Karnataka Journal of Agricultural Sciences 23 (1), 135-136 , 2010 2010 Citations: 14
Resistance development in pink bollworm ( Pectinophora Gossypiella Saunders ) against Bt cotton and its’ establishment as mid season pest in India R Kumar, BV Bhede, D Paul, NK Bhute, P Patil, RD Patel, MV Variya, ... Scientific Reports 15 (1), 7012 , 2025 2025 Citations: 13
Generation and evaluation of nanoparticles of supernatant of Photorhabdus luminescens (Thomas and Poinar) against mite and aphid pests of cotton for enhanced RA Kulkarni, A Prabhuraj, J Ashoka, SG Hanchinal, S Hiregoudar CURRENT SCIENCE 112 (11), 2312 , 2017 2017 Citations: 13
Biochemical basis of resistance in rice against brown and whitebacked planthopper KN Ashrith, AG Sreenivas, GS Guruprasad, SG Hanchinal, ... International Journal of Current Microbiology and Applied Sciences 6, 1699-1706 , 2017 2017 Citations: 13
Influence of weather parameters on the occurrence of major insect-pests in conventional rice ecosystem KN Ashrith, AG Sreenivas, GS Guruprasad, NB Patil, SG Hanchinal, ... ORYZA-An International Journal on Rice 54 (3), 324-329 , 2017 2017 Citations: 13
Status of insect pests and natural enemies of direct seeded and transplanted rice D ASHRITH K N, A.G.SREENIVAS,GURUPRASAD G S, HANCHINAL, S.G. AND KRISHNAMURTHY Int.J.Agri.Sci 8 (52), 2472-2478 , 2016 2016 Citations: 13
Fenpropathrin (Meothrin) 30 EC an ideal insecticide for chilli (Capsicum annum L) pest management AC Hosamani, K Thulasiram, BV Patil, M Bheemana, SG Hanchinal Pestology 24 (2), 21-24 , 2005 2005 Citations: 13
Bioefficacy of newer insecticidal molecules against safflower aphid K Basavaraj, AG Sreenivas, SG Hanchinal, BK Desai J. Oilseeds Res 29, 342-344 , 2012 2012 Citations: 11
Insect pest status and economics of Bt cotton cultivation under irrigated ecosystem. BV Patil, M Bheemanna, SG Hanchinal 2007 Citations: 11
