CAJ | 학술논문

双斑恩蚜小蜂和桨角蚜小蜂是华南地区烟粉虱的两种优势种寄生蜂.本文研究了两种寄生蜂对不同龄期烟粉虱寄主的产卵选择特性.结果表明: 两种寄生蜂均可寄生烟粉虱的1～4龄若虫. 当只有1个龄期的烟粉虱若虫存在时,双斑恩蚜小蜂更多地寄生3龄和4龄若虫,较少寄生1龄和2龄若虫;而桨角蚜小蜂则更多地寄生3龄和2龄若虫,较少寄生1龄和4龄若虫.在4个龄期若虫同时存在时,双斑恩蚜小蜂会明显增加对3龄和4龄若虫的产卵寄生,降低对1龄和2龄若虫的寄生;而桨角蚜小蜂则增加对2龄和3龄若虫的寄生,减少对1龄和4龄若虫的寄生.寄主植物的差异不影响这二种蚜小蜂对各龄期烟粉虱若虫的产卵选择倾向.结果提示,烟粉虱若虫3龄和4龄是双斑恩蚜小蜂最适宜的寄主,而桨角蚜小蜂最适宜的寄主是烟粉虱2龄和3龄若虫.
쌍반은아소봉화장각아소봉시화남지구연분슬적량충우세충기생봉.본문연구료량충기생봉대불동령기연분슬기주적산란선택특성.결과표명: 량충기생봉균가기생연분슬적1～4령약충. 당지유1개령기적연분슬약충존재시,쌍반은아소봉경다지기생3령화4령약충,교소기생1령화2령약충;이장각아소봉칙경다지기생3령화2령약충,교소기생1령화4령약충.재4개령기약충동시존재시,쌍반은아소봉회명현증가대3령화4령약충적산란기생,강저대1령화2령약충적기생;이장각아소봉칙증가대2령화3령약충적기생,감소대1령화4령약충적기생.기주식물적차이불영향저이충아소봉대각령기연분슬약충적산란선택경향.결과제시,연분슬약충3령화4령시쌍반은아소봉최괄의적기주,이장각아소봉최괄의적기주시연분슬2령화3령약충.
Encarsia bimaculata and Eretmocerus sp. Nr. Furuhashii are two dominant species of parasitoid parasitizing Bemisia tabaci in South China. Oviposition preference of the two species was studied in the laboratory. The results indicated that both the two species of wasps could parasitize all nymphal stages of B. Tabaci. When given a single instar nymphs of B. Tabaci,E. Bimaculata lay more eggs on the 3rd and 4th instar nymphs than on the 1st and 2nd instars, while Er. Sp. Nr. Furuhashii lay more eggs on the 3rd and 2nd instars than on the 1st and 4th instars. When given all four B. Tabaci instars simultaneously,E. Bimaculata decreased the parasitization on the 1st and 2nd instar nymphs but increased the parasitization on the 3rd and 4th instar immatures;whereas Er. Sp. Nr. Furuhashii increased its parasitization on the 2nd and 3rd instars but reduced oviposition on the 1st and 4th instars. Host plants showed no influence on the oviposition trends of the two wasps. The results suggested that the 3rd and 4th instar nymphs of B. Tabaci were the most suitable hosts for E. Bimaculata while the 2nd and 3rd instars were the more suitable for Er. Sp. Nr. Furuhashii.