Management schedule against seed borer, Trymalitis margarias (Lepidoptera: Tortricidae) in sapota K.D. Bisane, S. Irulandi, Prakash Patil, Sridhar Gautam Journal of Entomological Research, 2023 AbstractIn multi-location trials to test the bio-efficacy of insecticidal schedules against seed borer, Trymalitis margarias Meyrick on sapota at two different ecological zones. Sequential application of profenofos and indoxacarb as well as deltamethrin and Bt reduced the fruit damage up to 2.48 and 2.54% than control (7.38%) at Gandevi location. However, at Periyakulam, the sequential application of deltamethrin and Bt as well as profenofos and indoxacarb minimized fruit damage up to 0.9 and 1.17% than control (6.84%). Both schedules reduced fruit damage up to 65 -85% as well as enhanced the number of marketable fruits up to 15 - 35% at both locations.
Field efficacy of acaricides against citrus leaf mite panonychus citri mcgregor on acid lime C Chinniah, K Naveena, S Irulandi, M Shanthi Indian Journal of Entomology, 2021 Field experiment was carried out to evaluate the efficacy of certain new acaricide molecules against citrus leaf mite Panonychus citri McGregor at the Agricultural College and Research Institute, Madurai during December to March 2019. Among these, fenpyroximate 5EC @1.0 ml/ l led to 85.9% reduction of mites, closely followed by spiromesifen 22.9SC @0.75 ml/ l (83.2 % reduction) and propargite 57EC @ 2.0 ml/ l (79.4% reduction). These treatments also gave higher fruit yield (14.7 t/ ha, 13.9 t/ha, 11.6 t/ha) and increased cost benefit ratio (1:2.8, 1:2.6, 1:2.2), respectively.
Evaluation of insecticides and bacillus thuringiensis against tomato pin worm tuta absoluta (Meyrick) J Sandeep Kumar, J Jayaraj, M Shanthi, M Theradimani, V Balasubramani, S Irulandi, S Prabhu Indian Journal of Entomology, 2021 Tomato pin worm Tuta absoluta (Meyrick) is one of the most destructive pests causing damage to tomato. This field study undertaken in a randomized block design evaluated seven treatments during kharif, 2019 at farmers field in Theni district. The insecticides evaluated include- chlorantraniliprole 18.5SC 0.3ml/ l, spinosad 45SC 0.3ml/ l, indoxacarb 14.5SC 1ml/ l, Bt var. kurstaki HD1 2g/ l, Bt var. kurstaki HD73 2g/ l and Dipel at 2ml/ l. Chlorantraniliprole was observed to be the best with 81.48% reduction in incidence. In comparison, 80.58 and 79.10% reduction were observed with B. thuringiensis var. kurstaki HD1 and spinosad, respectively; and B. thuringiensis var. kurstaki HD73 was the least effective.
Potential of standard strains of Bacillus thuringiensis against the tomato pinworm, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) J. Sandeep Kumar, J. Jayaraj, M. Shanthi, M. Theradimani, Balasubramani Venkatasamy, S. Irulandi, S. Prabhu Egyptian Journal of Biological Pest Control, 2020 BackgroundThe tomato pinwormTuta absoluta(Meyrick) (Lepidoptera: Gelechiidae) is one of the key pests of tomato worldwide, causing an estimated crop loss of 80 to 100%. This pest has developed resistance to several pesticides due to overuse, resulting in control failures in the field. The use of biological insecticides asBacillus thuringiensisthat expressed insecticidal proteins can be an alternative tool by insecticides to suppress the pest population.Main bodyLaboratory study investigated the efficacy of standardBacillus thuringiensis(Bt) strains (4D1, 4D4, 4G1, 4K5 and 4XX4) againstT. absoluta. Bioassay was conducted using tomato leaf discs treated with spore crystal lysates prepared from the standard strains, and mortality data was subjected to concentration-mortality probit analysis. The LC50values forBt4D1,Bt4D4 andBt4G1 were 6.10, 6.62 and 8.18 μg/ml for the 2nd instar; 9.90, 10.20 and 11.12 μg/ml for the 3rd instar; and 19.82, 23.16 and 24.54 μg/ml for the 4th instar, respectively, while theBt4K5 andBt4XX4 were not toxic toT. absoluta.ConclusionThis study suggests thatBtstrain 4D1 is effective against different larval instars of the pest and can be used in its management.
Potential of Cry1Ac from Bacillus thuringiensis against the tomato pinworm, Tuta absoluta (Meyrick) (Gelechiidae: Lepidoptera) Sandeep Kumar Jalapathi, J. Jayaraj, M. Shanthi, M. Theradimani, Balasubramani Venkatasamy, S. Irulandi, S. Prabhu Egyptian Journal of Biological Pest Control, 2020 The tomato pinworm, Tuta absoluta (Meyrick) (Gelechiidae: Lepidoptera), is an introduced serious pest of tomato in India. Management of this insect pest mainly relies on insecticides because of its high infestation levels on all plant parts and life stages of tomato crop. This laboratory study investigated the efficacy of Cry1Ac protein of Bacillus thuringiensis against T. absoluta. The LC50 and LC95 values for 2nd, 3rd, and 4th larval instars were 0.12, 0.27, and 0.43 μg/ml and 0.63, 0.71, and 2.64 μg/ml, respectively. Experimental results showed that Cry1Ac is effective against different larval instars of tomato pinworm.
Toxicity of Insecticides to Tomato Pinworm, Tuta absoluta (Meyrick) Populations from Tamil Nadu J. Sandeep Kumar, J. Jayaraj, M. Shanthi, M. Theradimani, V. Balasubramani, S. Irulandi, S. Prabhu Indian Journal of Agricultural Research, 2020 Tomato pinworm, Tuta absoluta is a serious and notorious pest on tomato. Control mainly relies on insecticides because of their high infestation levels on all plant parts and life stages of the crop. This study, investigated the efficacy of different insecticides, against Tuta absoluta for different populations in laboratory conditions. The LC50 ranged from 0.27 to 2.0 ppm for chlorantraniliprole, from 1.01 to 2.25 ppm for flubendiamide, from 0.32 to 0.90 ppm for spinosad, from 0.98 to 6.52 ppm for imidacloprid, from 0.82 to 6.38 ppm for indoxacarb, from 967.32 to 1911.98 ppm, for chlorpyriphos, The resistance ratios ranged from 1.1 to 7.7-fold difference in all six cases. The laboratory experimental results showed that chlorantraniliprole and spinosad were the most toxic insecticides as compared to other chemicals and showed homogenous response to them.
Assessment of biopesticides and insecticide against pseudostem weevil Odoiporus longicollis Oliver in red banana Journal of Biopesticides, 2012
Effect of organic amendments on the incidence of stem fly Ophiomyia phaseoli (Tryon) and pod borer Lampides boeticus (L.) on French bean Journal of Biopesticides, 2012
Farm yard manure and neem cake on feeding preference, ovipositional preference and developmental period of coffee berry borer, Hypothenemus hampei Journal of Biopesticides, 2010
Induced systemic resistance to coffee berry borer, Hypothenemus hampei Ferrari through organic farming Research on Crops, 2009
