不同品种烟草对斜纹夜蛾生活史和产卵选择行为的影响

为探明不同品种烟草对斜纹夜蛾生活史和产卵选择行为的影响,随机选取了选育品种‘中烟100’和‘湘烟5号’,地方品种‘双管晒烟’和‘梁桥晒烟’,野生种‘八旦野生烟’和‘长花烟草’,测试斜纹夜蛾幼虫取食不同品种烟草后的生活史参数及成虫的产卵选择行为。结果表明,不同品种烟草对斜纹夜蛾的死亡率、发育历期、蛹重、蛹期、羽化率、成虫体重都有显著影响。按斜纹夜蛾的蛹重、羽化率和成虫干重从大到小对其所取食的烟草品种类型排序,依次为选育品种>地方品种>野生种;死亡率、蛹期和发育历期,从大到小依次为野生种>地方品种>选育品种。斜纹夜蛾对不同烟草品种的产卵选择偏好性存在差异,其中最偏好在选育品种上产卵,其次为地方品种,最不喜野生种。研究表明野生种烟草相对选育和地方品种而言对斜纹夜蛾抗性更高。

Effects of tobacco varieties on the life cycle and oviposition selection behavior of Spodoptera litura

To explore the effects of different tobacco varieties on the life cycle and oviposition selection behavior of Spodoptera litura,six tobacco varieties were randomly selected,including the bred varieties‘Zhongyan 100’and‘Xiangyan 5’,the local varieties‘Shuangguan suncured tobacco’and‘Liangqiao suncured tobacco’,and the wild varieties‘Badan wild tobacco’and‘Changhua tobacco’.The developmental performance and oviposition behavior of S.litura on different varieties of tobacco were tested.Different varieties of tobacco had significant effects on the death rate,developmental period,pupa weight,pupa stage,pupa eclosion rate and adult dry weight of S.litura.The pupa weight,pupa eclosion rate and adult dry weight of S.litura were ranked in the order of bred varieties>local varieties>wild varieties;the death rate,pupa stage and developmental period were ranked in the order of wild varieties>local variety>bred variety.The oviposition behavior of S.litura was significantly different across tobacco varieties.S.litura adults preferred to oviposit on bred varieties,followed by local and wild varieties,in that order.We conclude that wild tobacco varieties have higher resistance to S.litura than local and bred varieties.