不同色板对甘蓝靶标和非靶标昆虫的诱集效果

Trapping Effects of Different Colors Sticky Cards on Target and Non-target Insects in BrassicaoleraceaL.Field

为明确不同颜色的色板对甘蓝上靶标和非靶标昆虫的诱集效果,采用黄、黑、白、蓝和绿5种色板在息烽县甘蓝地进行诱集试验。结果表明:不同色板对靶标害虫的诱集效果有显著差异。其中蓝板对跳甲类害虫诱集效果最好,每板达9.07头,黑板对小菜蛾的诱集效果最好,每板达20.44头,绿板对蓟马的诱集效果最好,每板达546.21头;黄板对蚜虫、实蝇和叶蝉诱集效果较好,诱虫量分别达每板116.64、35.85和14.38头。对天敌和授粉昆虫的诱集结果表明,不同色板对小蜂、茧蜂和姬蜂类害虫诱集效果差异显著,其中以黄板的效果较好,分别每板达17.00、9.77和19.47头,而不同色板对授粉昆虫和捕食性天敌的诱集效果差异不显著。不同色板上益害比的比值不同,其大小顺序为黑色>黄色>绿色>白色>蓝色。这些结果表明供试色板不仅能诱集甘蓝害虫,也能诱杀非靶标昆虫。综合考虑推荐蓝板或绿板防治甘蓝害虫。总之,在生产上应根据甘蓝靶标害虫的发生规律选择合适的时期和色板进行防治,减少其对非靶标昆虫的影响。

Yellow, black, white, blue and green sticky cards were set in Brassica oleracea L. field in Xifeng county to trap target and non target insect,which aimed to compare the trap effects of different sticky cards. The results showed that the trapping effects on target insect pests were significantly different among sticky cards. The blue sticky cards had the best trap effect on Halticinae species （9.07 per card）, black sticky cards had the best trapping effect on diamondback moth （20.44 per card）, but the green sticky cards had the best trapping effects on thrips （546.21 per card）. While yellow sticky card had the best trapping effect against aphids, fruit flies and leafhoppers with the number of 116.64,35.85 and 14.38 per card, respectively. Trapping effects on Chalalcididae, Braconidae and Ichneumonidae sepcies were obviously different among sticky cards and the yellow card had better trap effects to these parasitoids with number of 17.00,9.77,19.47 per card,respectively. In addition,all tested cards could also trap pollination insects and predatory natural enemies, but the trap- ping number had no significant difference. Values of beneficial arthropods vs pests were different among cards, and the values from high to low were as following; black〉yellow〉white〉green〉blue. These results suggested that the tested sticky cards could both trap target pests, and non target insects, and green or blue cards were recommened to control pests in B. oleracea field. Totally, appropriate sticky cards should be selected at right time to control B. oleracea L. pests according to its occurrence, and this parctice may reduce negative effects against non target insects.