摘要:为明确寄主植物对桃蛀螟生长发育及产卵选择行为的影响，利用实验种群生命表和二项产卵选择试验，研究了玉米、大豆、棉花和桃等4种寄主植物对桃蛀螟种群生长发育及产卵选择性的影响。结果表明：取食棉花的桃蛀螟幼虫存活率最低、幼虫历期最长，取食玉米的幼虫存活率最高、幼虫历期最短，取食桃和大豆的幼虫存活率和历期居于棉花处理组和玉米处理组之间；玉米处理组的桃蛀螟化蛹率、蛹重和蛹历期均为最高，棉花处理组为最低，大豆和桃处理组的这些参数均显著小于玉米处理组而大于棉花处理组；发育至成虫后，取食玉米的桃蛀螟羽化率显著高于其他3个处理组；取食桃的桃蛀螟成虫寿命（雌虫和雄虫）及个体发育历期均显著高于其他3种处理组；同时取食桃的桃蛀螟单雌产卵量最高，其次是玉米处理组，两者均显著高于大豆和棉花处理组。二项产卵选择试验结果显示，桃蛀螟雌蛾在棉花和玉米处理组、玉米和大豆处理组或棉花和大豆处理组间的落卵量差异不显著；但在包含桃的处理组中，桃蛀螟在棉花、玉米或大豆处理区的落卵量均显著高于桃处理区。上述结果表明，供试4种寄主植物中，桃蛀螟偏好在棉花、玉米和大豆上产卵，其中玉米对桃蛀螟的适合度相对较高，棉花对桃蛀螟的适合度相对较低。



Abstract:To clarify effects of host plants on the development and oviposition selection of Conogethes punctiferalis, we studied the effects of four host plants including maize, soybean, cotton and peach on the development and oviposition selection of C. punctiferalis using the laboratorial population life table assays and two-choice oviposition selection tests. The results showed that the larvae fed on cotton gave the lowest survival rate but the longest development duration, and the larvae fed on maize gave the highest survival rate but the lowest development duration. While the survival rate and development duration of larvae fed on peach and soybean were between the cotton treated group and the maize treated group. All of the pupation rate, pupa weight and pupal development duration of C. punctiferalis fed on maize were the highest, while those of C. punctiferalis fed on cotton were the lowest, those fed with soybean and peach were significantly lower than maize-fed treatment but higher than cotton-fed treatment. The eclosion rate of C. punctiferalis fed on maize was obviously higher than that fed on other three host plants. The adult longevity (female and male) and individual development duration of C. punctiferalis fed with peach were all significantly higher than that fed with others. Meanwhile, the fecundity of C. punctiferalis was the highest when fed on peach, followed by maize treatment, which are all significantly higher than soybean treatment and cotton treatment. The results of the two-choice oviposition selection tests demonstrated that there were no significant differences for the number of eggs laid by C. punctiferalis female adults between cotton treatment and maize treatment area. The similar results were observed between maize treatment and soybean treatment or cotton treatment and soybean treatment area. While in the treatment group containing peach, the number of eggs laid by the moth in cotton, maize or soybean treatment area was obviously higher than that in peach treatment area. The above results indicated that C. punctiferalis preferred to lay eggs on cotton, maize or soybean among the four testing host plants. The maize had relatively high fitness for the larvae and cotton was relatively not suitable for the growth and development of C. punctiferalis.





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