Efficacy of insecticides against invasive rugose spiralling whitefly Aleurodicus rugioperculatus martin on Banana

Abstract

Laboratory and field evaluation of some insecticides (buprofezin 25 SC, pymetrozine 50 WG, flonicamid 50 WG, dinotefuran 20 SG, thiamethoxam 25 WG, profenophos 50 EC), botanical (azadirachtin 10000 ppm) and entomopathogenic fungus (Isaria fumosorosea Wize) were carried out against the invasive rugose spiralling whitefly Aleurodicus rugioperculatus Martin on banana. The results revealed that azadirachtin 10000 ppm (86.49%), dinotefuran 20 SG (82.64%), pymetrozine 50 WG (72.72%) and thiamethoxam 25 WG (79.59%) caused significant mortality of first and second instar nymphs at 2 days after treatment (DAT). Profenophos 50 EC (77.61%) and azadirachtin 10000 ppm (71.53%) were significantly effective and on par with mortality at 2 DAT of third and fourth instar nymphs. Flonicamid 50 WG was the most toxic with the least LC50 value (507.8 and 646.1) and buprofezin 25 SC was the least toxic with maximum value (1245.1 and 1752.0) for early and late instar nymphs, respectively. Profenophos 50 EC and LC50 buprofezin 25 SC also showed maximum ovicidal effect. Under field conditions, I. fumosorosea with 100% mortality was significantly superior compared to dinotefuran 20 SG (97.23%), thiamethoxam 25 WG (95.02%) and azadirachtin 10000 ppm (94.98%) at 6 DAT.