Vol. 11, Issue 1, Part B (2025)
Management of insecticide resistance in soybean aphid in the local condition of Chitwan district of Nepal
Management of insecticide resistance in soybean aphid in the local condition of Chitwan district of Nepal
Author(s)
Janak Pant and Prava Dawadi
Abstract
The study of management of insecticide resistance of soybean aphid (Aphis glycine) has been lacking in the local condition of Chitwan Nepal. Therefore, an experiment in the efficacy of different methods to reduce the resistance of soybean aphid was carried out during Novembre 2013 to February 2014 Agronomy farm of Institute of Agriculture and Animal Science (IAAS), Rampur, Chitwan. Single treatment of abamectin 1.8% EC (Emulsifiable Concentration) and three replication of the same insecticide namely appropriate (dose, time) spray of insecticide (R1), lower dose than that of recommendation (R2) and with minimal duration and interval than that of the recommendation (R3) were major attributes of the study. The research was carried out in split plot design selecting soybean crops. The average numbers of Soybean aphid (SBA) population were found as 1700, 1900, 1900 after 4 days of first treatment in R1 and R2 while 7 days of first treatment in R3 respectively. Initially each plot of replication had 2000 numbers of SBA on average. Similarly, the average numbers of Soybean aphids were noticed to be 1800, 2000 and 1850 after 8 days of first treatment in R1 and R2 while 15 days of first treatment in R3 respectively. Lastly, the average number of aphids was found to be 3700, 750 and 690 8 days R1 and R2 while non-countable duration for R3 after the fifth dose of spray insecticide respectively. The average yield was found to be 1, 2, and 2.3 (in ton/hectare) in R1, R2 and R3 respectively. The value of lower dose applied (R2) and reduced duration and interval than recommendation of insecticidal plot (R3) were at par with each other in both the cases. Thus, the insecticide resistance of soybean aphid (Aphis glycine) could be managed either by altering (decreasing) the dose of insecticide (abamectin) or by reducing the times and interval of insecticide (abamectin) application in the district.
How to cite this article:
Janak Pant, Prava Dawadi. Management of insecticide resistance in soybean aphid in the local condition of Chitwan district of Nepal. Int J Appl Res 2025;11(1):112-116.