摘要
本文是利用棉花耐害性或补偿能力,通过人工模拟摘蕾,了解二代棉铃虫发生为害规律和棉花本身耐害性(补偿能力)的关系.通过1982—1987年对棉花早期摘蕾并给以药剂点涂棉株顶尖试验示范,证明棉花生育早期具有很强的补偿能力.该项措施能控制二代棉铃虫在百株10头以下,增加棉花产量10%以上,减少棉花烂铃50%,增强棉花抗逆能力,推迟棉花衰退,同时能减少防治费用,保护天敌,具有明显的经济效益和生态效益.
This paper is aimed at finding out the relationship between the occure-nce of second generation cotton bollworm and its damage to cotton plants and the tolerance (or compensating ability) of cotton plants through picking bolls off plants artificially as bollworms damage to them. The experiments and demonstrations in 1982-1987 showed that cotton plants at their early stage of reproduction have a marvellous compensating ability when treated with artificial pick-off of bolls and smearing the tops of plants with chemicals. This measure gave the control effectiveness of under 10 boll-worms per 100 plants, yield increase of more than 10%, rotted bolls decrease 50% with the strengthening of the resistance of plants to adverse conditions and delaying the time of emaciation of plants. Meanwhile it reduced costs for control of cotton bollworm and protected natural enemies of the pest.
出处
《华北农学报》
CSCD
北大核心
1989年第1期85-90,共6页
Acta Agriculturae Boreali-Sinica
关键词
棉花
棉铃虫
摘蕾
补偿能力
Cotton bollworm
Pick-off of bolls
Compensating ability
