Field Efficacy of Selected Newer Insecticide Molecules on Spodoptera frugiperda (J. E. Smith) in Maize

Author: M.V. Matti, C.P. Mallapur, D.N. Kambrekar, S.I. Harlapur and U.K. Hulihalli

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Abstract

The combinations may be physically incompatible, effect the bio efficacy, result in phytotoxic effects or aid in insecticide resistance development in pests and injudicious use of pesticides in combinations without proper knowledge may reduce the efficacy of the combinations in managing the pests and diseases. The combinations include physically incompatible, effect the bio efficacy, result in phytotoxic effects or aid in insecticide resistance development in pests. Injudicious use of pesticides in combinations without proper knowledge may reduce the efficacy of the combinations in managing the pests and diseases. A field experiment was carried out at Main Agricultural Research Station (MARS), College of Agriculture, Dharwad, UAS, Dharwad, to study the efficacy of new generation insecticides and fungicides alone and in combination against maize fall armyworm Spodoptera frugiperda (J.E. Smith). It is a severe polyphagous pest with a wide host range of 186 plant species including many economically important crops such as maize, sorghum, sugarcane, rice, wheat, cowpea, groundnut, potato, soybean and cotton. Adult moths can travel up to 500 km during a single season to seek out oviposition sites and can fly over 100 km for seeking the host plants. The treatments comprising of eight newer insecticide molecules and three bio pesticides were further evaluated under field conditions during late kharif of 2019-20 and 2020-21 at Main Agricultural Research Station, Dharwad. The trial was conducted in Randomized Block Design (RBD) with twelve treatments and three replications. The popular maize hybrid, NK-6240 was sown over plot size of 5 × 4 m at a spacing of 60 × 20 cm for each treatment. The crop was raised as per recommended packages including plant protection measures except for target pest. Application of different treatments was done two times (at 30 and 50 days of germination) using knapsack sprayer by directing the spray solution into leaf whorls. The highest efficacy was found in newer insecticide molecules, cyantraniliprole 10 OD @ 0.30 g/l and spinetoram 11.7 SC @ 0.50 ml/l treatments causing cent per cent larval mortality within 3 days of application. By 7th day, more than 80 per cent larval mortality was registered in all other chemical treatments as compared to less than 50 per cent in case of biopesticides. All chemical treatments in general recorded lower leaf damage than biopesticide treatments which were even at par with the untreated check. Spinetoram 11.7 SC spray @ 0.5 ml/l resulted in highest grain yield which was at par with cyantraniliprole 10 OD @ 0.3 ml/l. Lower yields were obtained from the plots which received biopesticides application.

Keywords

Spodoptera frugiperda, spinetoram, cyantraniliprole, chlorantraniliprole, nimbecidine, Bacillus thuringiensis var. kurstaki

Conclusion

Application of cyantraniliprole 10 OD @ 0.30 g/l and spinetoram 11.7 SC @ 0.50 ml/l resulted treatments resulted in cent per cent larval mortality while, the biopesticides caused less than 50 per cent mortality of FAW in field conditions.

References

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How to cite this article

M.V. Matti, C.P. Mallapur, D.N. Kambrekar, S.I. Harlapur and U.K. Hulihalli (2022). Field Efficacy of Selected Newer Insecticide Molecules on Spodoptera frugiperda (J. E. Smith) in Maize. Biological Forum – An International Journal, 14(4): 76-82.