Key Laboratory of Bio-Pesticide Creation and Application of Guangdong Province, Department of Entomology, College of Plant Protection, South China Agricultural University, Guangzhou, China.
Plant Protection Research Institute, Guangdong Academy of Agricultural Science, Guangzhou, China.
Pest Manag Sci. 2021 Mar;77(3):1452-1464. doi: 10.1002/ps.6164. Epub 2020 Nov 28.
The brown planthopper (Nilaparvata lugens) is an insect pest of rice (Oryza sativa) that is distributed worldwide and is responsible for significant crop yield losses. Of particular concern, N. lugens has developed high resistance to several commonly used insecticides. The entomopathogenic fungus, Isaria javanica, offers an alternative to insecticides for the control of rice plant pests.
We show that I. javanica caused high mortality of N. lugens nymphs and reduced the survival and fecundity of newly emerged adults in I. javanica-treated insects. I. javanica persisted on plants up to 17 days after its inoculation under greenhouse conditions carried out in summer and autumn. Rice metabolites supported conidial germination and mycelia growth of I. javanica. A granular formulation of I. javanica conidia controlled N. lugens populations in a field experiment. The granular formulation promoted fungal survival and growth in the field up to 28 days post inoculation, resulting in increased fungal persistence and greater pest control coverage.
These data indicate that a granular formulation of I. javanica is able to control N. lugens populations in rice fields. Therefore, this granular formulation can be an alternative to insecticides and can be used in organic fields. © 2020 Society of Chemical Industry.
褐飞虱（Nilaparvata lugens）是一种分布于世界各地的水稻害虫，可导致作物严重减产。尤其值得关注的是，褐飞虱对几种常用杀虫剂已产生高水平抗性。昆虫病原真菌球孢白僵菌为防治水稻害虫提供了一种替代杀虫剂的选择。
我们表明，球孢白僵菌可导致褐飞虱若虫死亡率升高，并降低接种球孢白僵菌后新羽化成虫的存活率和繁殖力。在夏季和秋季进行的温室条件下接种后，球孢白僵菌在植物上的存活时间长达 17 天。水稻代谢物支持球孢白僵菌分生孢子的萌发和菌丝生长。球孢白僵菌的颗粒剂在田间试验中控制了褐飞虱种群。颗粒剂在接种后 28 天内促进了真菌的存活和生长，增加了真菌的持久性并提高了害虫防治的覆盖面。
这些数据表明，球孢白僵菌的颗粒剂能够控制稻田中的褐飞虱种群。因此，这种颗粒剂可以替代杀虫剂，并可用于有机领域。 © 2020 英国化学学会
