论文部分内容阅读
为生产优质、高档的无公害、绿色、有机果品(桃、李、梨、葡萄、苹果、猕猴桃等),选择低毒杀菌剂(农药毒性LD_(50)均小于2000毫克/千克),低残留的杀虫、杀螨剂稀释液,用于套袋前后喷施进行病虫害防治十分重要。套袋前喷四次谢花后7～10天必须喷第一次杀菌剂,以后视雨量、雨日分布,确定合理间隔期。每次药后,若雨日集中且雨量较大,每隔7天喷一次;如久旱无雨。可间隔10～12天喷药一次,以确保叶片、果面附着有效药液。第四次须在套袋前4天喷完。
For the production of high quality, high-grade pollution-free, green and organic fruits (peach, plum, pear, grape, apple and kiwifruit etc.), low toxicity bactericides (pesticide toxicity LD 50 less than 2000 mg / Insecticide, acaricide dilute solution, for spraying before and after the bagging pest control is very important. Squirting four times before the flower thank you 7 to 10 days must spray the first fungicide, depending on rainfall, rain distribution, to determine a reasonable interval. After each drug, if the rainy day is concentrated and the rainfall is heavy, spray once every seven days; Spraying interval 10 ~ 12 days to ensure that the leaves, fruit surface attached to the effective liquid. The fourth time to be sprayed 4 days before bagging.