CAJ | 학술논문

产卵选择性是衡量植食性昆虫寄主专一性的主要性状之一。为揭示广聚萤叶甲幼虫取食的植物是否影响其成虫产卵植物选择性，于室外网室中采用重复观测设计开展试验，研究幼虫期取食靶标豚草或非靶标苍耳对成虫在这2种植物上的产卵选择性。在非选择性试验中，广聚萤叶甲幼虫取食豚草和苍耳后的产卵数量没有显著差异；但成虫在2种植物上的产卵数量存在显著差异，如幼虫分别在豚草和苍耳上取食，其成虫在豚草上分别产18.94和21.90粒卵，而在苍耳上分别产24.39和25.12粒卵。对卵粒大小（用体积表示）的分析表明，产卵植物之间及其与幼虫取食植物互作对卵粒大小均无显著影响，但幼虫取食不同植物的成虫所产卵粒大小存在显著差异，幼虫取食豚草的成虫产卵粒显著大于取食苍耳的产卵粒。卵孵化率为60%～70%，在各处理之间没有显著差异。在选择性试验中，对产卵选择频次的分析未发现幼虫取食不同植物以及成虫产卵测试植物等处理影响产卵选择偏好。本研究结果说明，广聚萤叶甲雌成虫产卵数量决策行为受幼虫取食植物的影响不大。
산란선택성시형량식식성곤충기주전일성적주요성상지일。위게시엄취형협갑유충취식적식물시부영향기성충산란식물선택성，우실외망실중채용중복관측설계개전시험，연구유충기취식파표돈초혹비파표창이대성충재저2충식물상적산란선택성。재비선택성시험중，엄취형협갑유충취식돈초화창이후적산란수량몰유현저차이；단성충재2충식물상적산란수량존재현저차이，여유충분별재돈초화창이상취식，기성충재돈초상분별산18.94화21.90립란，이재창이상분별산24.39화25.12립란。대란립대소（용체적표시）적분석표명，산란식물지간급기여유충취식식물호작대란립대소균무현저영향，단유충취식불동식물적성충소산란립대소존재현저차이，유충취식돈초적성충산란립현저대우취식창이적산란립。란부화솔위60%～70%，재각처리지간몰유현저차이。재선택성시험중，대산란선택빈차적분석미발현유충취식불동식물이급성충산란측시식물등처리영향산란선택편호。본연구결과설명，엄취형협갑자성충산란수량결책행위수유충취식식물적영향불대。
Oviposition selection of plants is a critical trait in evaluation of host specificity in classical biological weed control. The non-native leafbeetle Ophraella communa (LeSage), an oligophagous insect and effective biological control agent of the alien invasive common ragweed Ambrosia artemisiifolia L. in China, can occasionally feed the non-target cocklebur Xanthium sibiricum Patr. The effects of larval food plants A. artemisiifolia and X. sibiricum on adult selection of oviposition plants were assessed using a repeated measure design in outdoor slat house. In the no-choice trial, when oviposition plant was the same as larval food plant, the number of eggs deposited was not significantly different, but when the larvae were fed on A. artemisiifolia or X. sibiricum, more eggs were deposited on X. sibiricum than on A. artemisiifolia, averaging 24.39 and 25.12 eggs on X. sibiricum, and 18.94 and 21.90 eggs on A. artemisiifolia. Egg size (measured as volume) showed no significant difference between oviposition plants, but was significantly different between larval food plants, being bigger when larvae were fed on A. artemisiifolia than on X. sibiricum. There was no significant difference in egg hatching rate between larval food plants or between oviposition plants, ranging from 60%to 70%. In choice trials, there were no significant effects of larval food plants on oviposition plant preferences in adults. The results of this study suggested that larval food plants may have little influence on oviposition plant selection and number of eggs deposited.