苹果落花后至套袋前的农药使用原则内容摘要:
2、药,应早施 35 天,以利充分发挥药效;保护性杀菌剂应在病菌侵染前施药,内吸性杀菌剂应于发病初期施药。 3、准确用药:一要严格按照农药标签上的用量和使用浓度用药,二要选择正确的施药方法,如用熏蒸法或注射法防治天牛、吉丁虫等蛀干害虫;三要提高施药质量。 喷洒药液时要保持均衡的压力,喷头离果树叶片 以上,以保证雾化效果。 喷雾要均匀周到,从上到下,由内到外,叶片正背面都要喷到药液,不能漏喷,也不能多喷,以叶片充分湿润,又不会形成流动水滴为好。 4、安全用药:主要包括对人畜、果树、果品及天敌的安全。 如套袋前的幼果期,要选用对幼果安全的干悬浮剂、水分散性粒剂、水浮剂、微乳剂或可湿性粉剂等剂型的农药,不要使用有机磷、菊酯类杀虫剂和含硫磺、福美类及含铜的杀菌剂,以免引起果锈及杀伤天敌。 专利查询。苹果落花后至套袋前的农药使用原则
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