CONCENTRATION MORTALITY RESPONSE OF PHYLLOPHAGA-HIRTICULA (COLEOPTERA, SCARABAEIDAE) TO 3 ENTOMOGENOUS NEMATODES

被引:10
作者
FORSCHLER, BT [1 ]
GARDNER, WA [1 ]
机构
[1] UNIV GEORGIA, COLL AGR, GEORGIA EXPT STN, GRIFFIN, GA 30223 USA
关键词
INSECTA; PHYLLOPHAGA; ENTOMOGENOUS NEMATODES; BIOASSAY;
D O I
10.1093/jee/84.3.841
中图分类号
Q96 [昆虫学];
学科分类号
摘要
LC50s of Steinernema carpocapsae (Weiser), S. glaseri (Steiner), and Heterorhabditis heliothidis (Khan, Brooks & Hirschmann) to third-instar Phyllophaga hirticula (Knoch) were 210, 86, and 12 nematodes per grub, respectively, when administered as peroral injections. Bioassay of the three nematodes against P. hirticula larvae in soil arenas without food, however, failed to produce discernible concentration-mortality responses. Observations indicated that, although infective nematodes remained in the soil and on the grubs 2 wk after application, a large proportion of the nematodes migrated from the soil immediately after application. Thus, the actual concentration of nematodes in the arenas was less than the concentration applied, and probably accounted for the lack of response in bioassays in soil arenas.
引用
收藏
页码:841 / 843
页数:3
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