Melanaphis sacchari (Zehntner) is a major pest of sorghum, Sorghum bicolor (L.) Moench, in the United States and neighboring Caribbean countries including Haiti. Laboratory, greenhouse, and field experiments were conducted to determine the effects of biological insecticides on M. sacchari infesting sorghum. Azadirachtin, pyrethrins, Beauveria bassiana strain GHA, Isaria fumosorosea Apopka strain 97, Chromobacterium subtsugae strain PRAA4-1^T, Burkholderia spp. strain A396, and vetiver oil were compared to a conventional insecticide, flupyradifurone. In the laboratory, sorghum leaf discs were sprayed with treatment solutions and subsequently infested with M. sacchari nymphs. In the greenhouse, potted sorghum plants were sprayed with treatment solutions before or after infestation with M. sacchari nymphs. In the field, plots exposed to natural M. sacchari infestations were sprayed with treatment solutions. All insecticide treatments except I. fumosorosea and Burkholderia spp. were associated with 58–100% aphid mortality after 72 h in the laboratory, which was greater than the 20% mortality observed in the non-treated control. In the greenhouse, azadirachtin and pyrethrins were the biological insecticides associated with the lowest aphid infestation levels 7 days after treatment. Flupyradifurone was associated with the greatest mortality in the laboratory and the lowest infestation levels in the greenhouse. In the field, decreases in aphid infestation levels relative to the non-treated control were not observed although flupyradifurone was consistently associated with the lowest infestations. Our results suggest that biological insecticides including azadirachtin, pyrethrins, and B. bassiana could potentially control M. sacchari infestations in sorghum if applied under favorable environmental conditions.

Melanaphis sacchari（Zehntner）是美国和包括海地在内的加勒比海国家的高粱的主要害虫，即高粱双色（L.）Moench。进行了实验室，温室和野外实验，以确定生物杀虫剂对糖精分枝杆菌侵染高粱的影响。印za素，除虫菊酯，球孢白僵菌GHA菌株，烟酸艾索里亚（Isaria fumosorosea） Apopka菌株97，Subtsugae绿杆菌菌株PRAA4-1 ^T，伯克霍尔德氏菌spp。将A396菌株和香根草油与常规杀虫剂flupyradifurone进行了比较。在实验室中，用处理溶液喷洒高粱叶圆片，然后用糖精分枝虫若虫感染。在温室中，在用酿酒酵母若虫侵染之前或之后，用处理溶液喷洒高粱盆栽植物。在田间，将暴露于自然分枝杆菌的田地喷洒处理溶液。除烟曲霉和伯克霍尔德菌外的所有杀虫剂治疗spp。在实验室72小时后，它们与58-100％的蚜虫死亡率相关，高于未治疗的对照组中观察到的20％死亡率。在温室中，印za素和除虫菊酯是在处理后7天与蚜虫侵扰程度最低相关的生物杀虫剂。氟吡呋喃酮与实验室中最高的死亡率和温室中最低的侵染水平有关。在田间，未观察到相对于未处理的对照，蚜虫侵害水平降低，尽管氟吡呋喃酮与最低的侵扰一致。我们的结果表明，包括印za素，除虫菊酯和球孢杆菌在内的生物杀虫剂可能潜在地控制了糖精。 如果在有利的环境条件下施用，高粱会受到侵染。