Wheeler Celeste E, Vandervoort Christine, Wise John C
Department of Entomology, Michigan State University, East Lansing, MI 48824, USA.
Pesticide Analytical Laboratory, Michigan State University, 206 Center for Integrated Plant Systems, Michigan State University, East Lansing, MI 48824, USA.
Insects. 2020 Sep 22;11(9):650. doi: 10.3390/insects11090650.
Organic production of pears is challenging in part because OMRI (Organic Materials Review Institute) approved biopesticides are short lived when applied as foliar sprays. Trunk injection is an alternative method of insecticide delivery that may enhance the performance of biopesticides for control of pear psylla. The objective of this study is to compare the efficacy of azadirachtin and abamectin in the control of pear psylla using two different application methods, airblast sprayer and trunk injection. Trunk injections of azadirachtin and abamectin were compared to airblast applications of equal labeled rates on 33-year-old Bartlett Pear trees (Pyrus communis L., var "Bartlett"). The azadirachtin and abamectin trunk injected treatments performed equally or better than the two airblast applications in the control of the pear psylla. The trunk injected trees from the first season provided a moderate level of control into the second season, one year after the injections. This study suggests that trunk injection is a superior delivery system for biopesticides used in organic pear production.
梨的有机生产具有挑战性，部分原因是有机材料审查协会（OMRI）批准的生物农药在作为叶面喷雾剂施用时持效期较短。树干注射是一种杀虫剂施用的替代方法，可能会提高生物农药防治梨木虱的效果。本研究的目的是比较印楝素和阿维菌素使用两种不同施用方法（气力喷雾器和树干注射）防治梨木虱的效果。将印楝素和阿维菌素的树干注射与在33年生巴梨（Pyrus communis L.，品种“巴梨”）树上以相同标签剂量进行的气力喷雾施用进行比较。在防治梨木虱方面，印楝素和阿维菌素树干注射处理的效果与两次气力喷雾施用相同或更好。第一季进行树干注射的树木在注射一年后的第二季仍提供了适度的防治效果。本研究表明，树干注射是有机梨生产中使用的生物农药的一种更优施用系统。
