HOST-PLANT SELECTION BY SCHISTOCERCA-AMERICANA (ORTHOPTERA, ACRIDIDAE)

被引：22
|
作者：
CAPINERA, JL
机构：
[1] Dept. of Entomology & Nematology, Univ. of Florida, Gainesville
来源：
ENVIRONMENTAL ENTOMOLOGY | 1993年 / 22卷 / 01期
关键词：
AMERICAN GRASSHOPPER; HOST PREFERENCE; SCHISTOCERCA;
D O I：
10.1093/ee/22.1.127
中图分类号：
Q96 [昆虫学];
学科分类号：
摘要：
The preference of Schistocerca americana (Drury) for 40 potential host plants relative to bahiagrass, Paspalum notatum, was determined in two-choice and four-choice tests. Although highly polyphagous, S. americana demonstrated clear preference and nonpreference for certain species. Host selection by small nymphs (instars 3 and 4), large nymphs (instars 5 and 6), and adults was highly correlated. Host selection by spring-generation grasshoppers was highly correlated with summer-generation host preference. The presence of alternate hosts, especially nonpreferred species, resulted in modified host-selection behavior wherein grasshoppers were more discriminating in four-choice tests than two-choice tests.
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页码：127 / 133
页数：7
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