瓜蚜对不同甜瓜品种的取食选择性

选择7个不同甜瓜品种,综合比较了瓜蚜对不同品种室内离体叶片的取食选择性及在室外活体植株上的种群增长动态。结果发现,瓜蚜对IVF437和羊角蜜的叶碟选择性比其他品种低,叶碟选择2 h后羊角蜜和IVF437上的瓜蚜数量为2~3头,选择率为5.54%~7.38%;培养12 h后,羊角蜜和IVF437上的若蚜分别为5.50头和14.00头。且瓜蚜在这2个品种上的种群增长速度也较慢,研究结果为田间甜瓜品种的选择种植及进一步选育抗蚜品种提供了科学基础。

Feeding Preference of Aphis gossypii Glover on Different Melon Varieties

In order to compare the anti-aphid melon varieties，7 varieties were compared by combination of preference selection on leaf discs in laboratory and the population dynamics on plants in the open field．The results showed that differences of feeding and oviposition preferences of Aphis gossypii Glover have been observed among the 7 melon cultivars．The aphids on‘ Yangjiaomi’ and‘ IVF437’ were lower（2-3 aphids），with the choice rate of 5.54%-7.38% after 2 hours feeding．After 12 hours，there were 5.50 and 14.00 nymph aphids observed on ‘Yangjiaomi’ and‘ IVF437’，respectively，showing that the preferences for‘ Yangjiaomi’ and‘ IVF437’ of A. gossypii were significantly lower than that of the other varieties．Same trend were observed for the choice trial on leaf discs after 24 hours．In addition，the population of A. gossypii increased continuously on 7 melon plants and the aphids on‘ IVF437’ plants were 827.00 after 15 days，exhibiting the lowest quantities．In conclusion，‘IVF437’ and‘ Yangjiaomi’ had higher anti-aphid traits than the rest tested varieties in this study．The results will provide scientific basis for the plantation and breeding of melon aphid-resistant varieties．