The rugose spiraling whitefly (RSW), Aleurodicus rugioperculatus Martin (Hemiptera: Aleyrodidae), an exotic polyphagous pest and its infestation was documented on coconut (Cocos nucifera L.) for the first time in India during 2016. RSW has attained a serious pest on many economically important crop plants due to its damage severity and rapid spread across the country in a short span of time. Hence, an attempt was made to evaluate the efficiency of the entomopathogenic fungus (EPF), Isaria fumosorosea alone as well as in combination with a reduced dose of few insecticides against RSW on coconut to devise a sustainable integrated pest management module. Thirty-two randomly selected RSW-infested coconut palms were labelled, and eight treatments with four replications were used in a randomized complete block design during the summer months (April and May) during 2021. Two sprays were performed at 15-day intervals, at a rate of 5 L/palm, and observations on infestation/palm (%), intensity (%) and mean live colonies of RSW were recorded. The results revealed that the combination of I. fumosorosea (ICAR-NBAIR Pfu-5) @ 5 ml/l + profenophos 50 EC @ 2 ml/l spray significantly reduced per cent infestation of RSW (82.97%), per cent intensity of RSW (80.49%) and mean RSW live colonies (79.68%) followed by combination of I. fumosorosea (ICAR-NBAIR Pfu-5) @ 5 ml/l + buprofezin 25% SC @ 1.25 ml/l spray significantly reduced per cent infestation of RSW (79.35%), intensity of RSW (74.79%) and mean RSW live colonies (74.20%) over I. fumosorosea (ICAR-NBAIR Pfu-5) @ 5 ml/l alone and untreated control. A combination of I. fumosorosea (5 ml/l) + profenophos 50 EC (2 ml/l) spray twice at an interval of 15 days was found effective in reducing the RSW population on coconut. The present study concludes that the RSW can be controlled effectively by I. fumosorosea alone and in combination with novel insecticides at a reduced rate which showed better toxicity, ovicidal action and preserve natural enemies and reduced environmental load of chemical pesticides.

中文翻译：

---

Isaria fumosorosea 单独和与杀虫剂联合对椰子上的 Aleurodicus rugioperculatus 的田间疗效

皱褶螺旋粉虱 (RSW)、Aleurodicus rugioperculatus Martin (Hemiptera: Aleyrodidae) 是一种外来的多食性害虫，2016 年在印度首次记录到其侵染椰子 (Cocos nucifera L.)。RSW 在许多经济上重要的农作物由于其损害严重，并在短时间内迅速蔓延到全国。因此，我们尝试评估昆虫病原真菌 (EPF)、Isaria fumosorosea 的效率，以及结合减少剂量的少量杀虫剂对抗椰子上的 RSW，以设计一个可持续的综合害虫管理模块。标记了 32 个随机选择的受 RSW 感染的椰子树，在 2021 年的夏季（4 月和 5 月）期间，在随机完整区组设计中使用了 8 次、4 次重复的处理。每隔 15 天进行两次喷雾，喷洒率为 5 L/手掌，并观察侵染/记录 RSW 的手掌 (%)、强度 (%) 和平均活菌落。结果表明，I. fumosorosea (ICAR-NBAIR Pfu-5) @ 5 ml/l + profenophos 50 EC @ 2 ml/l 喷雾的组合显着降低了 RSW 侵染百分比 (82.97%)，RSW 强度百分比(80.49%) 和平均 RSW 活菌落 (79.68%)，然后是 I. fumosorosea (ICAR-NBAIR Pfu-5) @ 5 ml/l + buprofezin 25% SC @ 1.25 ml/l 喷雾剂的组合显着降低了RSW (79.35%)、RSW 强度 (74.79%) 和平均 RSW 活菌落 (74.20%) 超过 I。fumosorosea (ICAR-NBAIR Pfu-5) @ 5 ml/l 单独和未处理的对照。发现 I. fumosorosea (5 ml/l) + profenophos 50 EC (2 ml/l) 的组合以 15 天的间隔喷洒两次，可有效减少椰子上的 RSW 种群。本研究得出的结论是，单独使用 I. fumosorosea 可以有效控制 RSW，并以较低的速率与新型杀虫剂结合使用，从而显示出更好的毒性、杀虫作用并保护天敌并减少化学杀虫剂的环境负荷。