论文部分内容阅读
鸭梨套袋能使鸭梨果面洁净,减少机械伤,避免病虫危害,降低残毒量。随着我国鸭梨出口数量越来越大,同时,国际市场对鸭梨果实的质量要求也越来越高。采取鸭梨果实套袋是提高果品质量的一项有效的栽培措施,但是目前生产中在鸭梨果实套袋前、后还存在着一些问题。需认真解决,保证套袋的良好效果。一、适量留果。根据各种不同的立地条件、管理水平,确定适宜的留果量。一般要求20张叶留一果,套袋的花序要疏成单果,保证梨果单果重在170克以上。二、套袋时间。在5月中下旬疏果以后。立即开始套袋,务必于6月10日前结束。这是因为,6月上旬以后黄粉虫会沿果柄爬行到果面进行危害,此后套袋会误将黄粉虫套入袋内,造成损失。三、套袋前喷治虫防病药,套袋后注意除治蝽蟓。套袋前要喷布菊酯
Pear bagging can make the pear fruit surface clean, reduce mechanical injury, to avoid the hazards of pests and diseases, reduce the residual volume. As China’s export volume of pear growing, at the same time, the international market Ya pear fruit quality requirements are getting higher and higher. Taking pear pear fruit bagging is an effective cultivation measure to improve fruit quality. However, there are still some problems in the production of pear pear fruit before bagging. Need to be seriously resolved to ensure the bagging good results. First, the amount of fruit retention. According to a variety of site conditions, management level, to determine the appropriate amount of retained fruit. The general requirements of 20 leave a fruit, bagging inflorescence to single fruit, fruit weight to ensure that more than 170 grams. Second, bagging time. In late May after thinning fruit. Start bagging immediately, be sure to end on June 10. This is because, after early June, Tenebrio crawls along the stalk to the fruit surface for harm, then bagging may mistakenly put the Tenebrio into the bag, resulting in loss. Third, before spraying bag control pest control drugs, after bagging note rule except stink bug. Replenishment should be sprayed before bagging