糖醋液对香梨优斑螟和草蛉的诱杀作用*

在苹果园设置4种不同组分的糖醋液（Ⅰ 红糖∶食用醋〖DK1〗∶酒〖DK1〗∶水=2〖DK1〗∶3〖DK1〗∶1〖DK1〗∶11，Ⅱ 白砂糖〖DK1〗∶食用醋〖DK1〗∶酒〖DK1〗∶水=2〖DK1〗∶3〖DK1〗∶1〖DK1〗∶11，Ⅲ 红糖〖DK1〗∶乙酸〖DK1〗∶水=2〖DK1〗∶1〖DK1〗∶11，Ⅳ 白砂糖〖DK1〗∶乙酸〖DK1〗∶水=2〖DK1〗∶1〖DK1〗∶11），比较其对香梨优斑螟等果树害虫的诱捕效果，及对天敌草蛉等的影响。结果表明，糖醋液中添加酒的组分（Ⅰ和Ⅱ）对香梨优斑螟的诱杀效果好，与不添加酒成分的效果差异极显著；对草蛉的诱杀也存在影响，但差异不显著。糖醋液中不同的糖（Ⅰ和Ⅲ，Ⅱ和Ⅳ）对于香梨优斑螟、苹果蠹蛾、其他蛾类及草蛉的诱杀效果不存在显著性差异。试验期间发现诱杀的不同种类昆虫数量上存在补性，认为在诱捕器附近可能存在种间排挤效应。

Trapping effects of the mixture of sugar and acetic acid on moths and lacewings

The mixtures of sugar, acetic acid, ethanol and water solution (SAEW) at 2∶3〖DK1〗∶1〖DK1〗∶11 (Ⅰ) or 2〖DK1〗∶3〖DK1〗∶1〖DK1〗∶11 (Ⅱ), or sugar, acetic acid and water solution (SAAW) at 2〖DK1〗∶1〖DK1〗∶11 (Ⅲ) or 2〖DK1〗∶1〖DK1〗∶11 (Ⅳ), which may trap and even kill many kinds of insects, are commonly used for pest control and forecast. In this study, the trapping effects of SAAW or SAEW on moths and lacewings were carried out in the apple orchards from July to September. The results revealed that SAAW could trap significantly more Euzophera pyriella than SAEW (p<0.01), but for lacewings, there was no significant difference (p>0.05). The sugar types of SAAW or SAEW had no significant effects on trapping of E. pyriella, Cydia pomonella, lacewings or other moths. In addition, it seemed that there existed interspecies competition among trapped insects at pitfall traps, according to dynamic graphs of trapping amounts.