摘要
为明确烟粉虱的寄主选择机制,利用刺吸电波技术(EPG)记录了B型烟粉虱在苘麻、棉花、黄瓜、甘蓝和烟草上的刺吸取食波型,并比较了烟粉虱在寄主植物上的产卵行为。研究结果表明,烟粉虱在5种寄主植物上的刺吸过程由A、B、C、E、G和np波组成,但取食不同植物的波型比例、频次及平均持续周期等指标有显著性差异。烟粉虱取食苘麻时,反映被动取食行为的E波比例和平均周期分别达83.8%和20.2min,明显高于其它寄主植物。总体上,B型烟粉虱取食5种寄主植物的适宜度为苘麻>黄瓜>棉花>烟草>甘蓝。烟粉虱在不同寄主植物上的产卵量随产卵时间延长而增加,但增加量明显低于接虫24h的产卵量。烟粉虱对苘麻的产卵选择性显著高于棉花,但与黄瓜、甘蓝、烟草没有显著的差别。在本试验烟粉虱雌虫密度的范围内,各种寄主植物的产卵量与烟粉虱成虫密度成正相关,高密度下烟粉虱成虫在甘蓝和苘麻上的产卵量显著高于黄瓜、烟草和棉花。
In order to understand host selective mechanism of Bemisia tabaci Gennadius biotype B, the insect feeding and oviposition behaviors on cotton （ Gossypium hirsutum L. ） , cucumber （ Cucurnis sativus L. ） , cabbage （Brassica oleracea L. ）, tobacco （Nicotiana tobacum L. ） and velvetleaf （Abutilon theophrasti Medic） were studied under controlled conditions using electrical penetration graph （EPG） technique and normal ecological methods, respectively. The results from EPG experiments indicated that the feeding graphs of the whitefly consisted of six waves （ A, B, C, E, G and np） on all of the five host plants, but there were significant differences in the feeding percent ratio, frequency and average duration of E wave. While the insect fed on velvetleaf, its actual feeding percentage reached 83.8% with a feeding duration of 20.2 min, which was significantly higher than that on other hosts. In general, the feeding adaptability of the B. tabaci adults on the plant species ranked as velvetleaf 〉 cucumber 〉 cotton 〉 tobacco 〉 cabbage. There was a positive relationship between fecundity of the adults and the duration they lived on the host plants, but the increasing rate of eggs was much lower in comparison with the first 24 hours.B. tabaci adults showed a stronger preference to oviposit on velvetieaf than that on cotton, but there were not significant differences among velvetleaf and cabbage, cucumber or tobacco. There was a positive relationship between fecundity of the adults and their density on the hosts in this experiment. However, the eggs on the plants of cabbage and velvetleaf at high adult densities were significantly higher than those on cucumber, cotton and tobacco.
出处
《植物保护学报》
CAS
CSCD
北大核心
2008年第3期199-204,共6页
Journal of Plant Protection
基金
科技部“973”项目(2002CB111402)
支撑计划项目(2006BAD08A07)
关键词
B型烟粉虱
寄主植物
EPG
取食行为
产卵
Bemisia tabaci biotype B
host plant
EPG
feeding behavior
oviposition
