USDA, Agricultural Research Service, National Center for Agricultural Utilization Research, Crop BioProtection Research Unit. 1815 N. University, Peoria, IL.
J Insect Sci. 2020 Nov 1;20(6). doi: 10.1093/jisesa/ieaa134.
The walnut husk maggot, Rhagoletis sauvis (Loew) (Diptera: Tephritidae), causes damage to walnuts when maggots feed inside the husk. September applications of the entomopathogenic fungi Metarhizium brunneum F52 as microsclerotia laced granules to the soil in Illinois were evaluated for pest control based on adult emergence during the following summer. Over 3 yr in central Illinois, adult emergence began near 1 July, peaked before 23 July, and emergence extended as late as 23 August. One summer application of fungus (30 June) when pupae were present, did not reduce fly emergence. Of two September applications that targeted maggots as they move to the soil to pupate, one significantly reduced the number of flies emerging from treated plots when compared with untreated plots for one 7-d sample collected 29 July 2020. Emergence trap data show a defined peak adult emergence in July for central Illinois while September applications of granules containing Metarhizium brunneum (Petch) (Hypocreales: Clavicipitaceae) show shows potential to reduced subsequent fly emergence.
胡桃壳瘿蚊，Rhagoletis sauvis（Loew）（双翅目：瘿蚊科），当幼虫在壳内进食时会对胡桃造成损害。在伊利诺伊州，将病原真菌玫烟色棒束孢 F52 作为微菌核颗粒拌入土中，于 9 月施用以防治虫害，其效果根据次年夏季成虫的出现情况进行评估。在伊利诺伊州中部的 3 年研究中，成虫出现接近 7 月 1 日，7 月 23 日前达到峰值，成虫出现时间延长至 8 月 23 日。在蛹期施药（6 月 30 日），不能减少飞蝇的出现。在针对向土壤中化蛹的幼虫的 2 次 9 月施药中，当在 2020 年 7 月 29 日收集的为期 7 天的样本中，与未处理的对照相比，其中一次处理显著减少了从处理区出现的飞蝇数量。诱虫器数据显示，对于伊利诺伊州中部，成虫出现的高峰期在 7 月，而 9 月施用以玫烟色棒束孢（Petch）（腔孢纲：棒束孢科）为活性成分的颗粒剂具有减少后续飞蝇出现的潜力。
