Comparative Efficacy of Dinotefuran, Imidacloprid and Pymetrozine against Rose Aphid (Macrosiphum rosae) under Controlled and Field Conditions

Macrosiphum rosae is the major pest of rose plants and crops. There is limited research on using reduced-risk insecticides for rose aphid control, highlighting the need for more insights into their effectiveness and sustainable application. The study evaluated aphidicidal impact of novel chemistry insecticides i.e. Dinotefuran, Imidacloprid and Pymetrozine against rose aphids under laboratory and field conditions. Efficiency of Dinotefuran (T1), Imidacloprid (T2), and Pymetrozine (T3) against rose aphids were evaluated over 24, 48, and 72 hours in a laboratory by using leaf dip method. Imidacloprid (T2) showed the highest mortality, increasing from 15.5%-85.4% at 24 hours to 28.3%-96.6% at 72 hours. Dinotefuran (T1) followed closely, with mortality rising from 13.3%-80.9% to 22.6%-94.3% over the same period. Pymetrozine (T3) was slightly less effective, with mortality ranging from 20.2%-85.7% at 24 hours to 34.5%-92.9% at 72 hours. Field results also confirmed Imidacloprid long-term effectiveness, increasing to 31.7% by Day 5, with Dinotefuran and Pymetrozine slightly behind. Overall, Imidacloprid proved to be the most effective treatment, with Dinotefuran close behind and Pymetrozine slightly less successful. Overall, the most successful treatment was imidacloprid (T2), closely followed by dinotefuran (T1), and slightly less effective was pymetrozine (T3).