时间:2020-05-15 11:22
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若前期预防工作没到位,易造成后期“尿袋”。蓟马:葡萄花后的主要害虫之一,通过锉吸果皮形成麻皮果,影响果品。幼果被害当时不变色,第二天被害部位失水干缩,形成小黑斑。绿盲蝽:一年发生4~5代,葡萄萌芽后即可危害,吸食幼嫩叶片,造成叶片缺刻空洞。
选用噻嗪酮、吡蚜酮等药剂防治稻飞虱。选用丙溴磷、氯虫苯甲酰胺等防治稻纵卷叶虫。选用咪鲜胺、三环唑等药剂防治稻瘟病。选用杀虫双、杀虫单等药剂防治螟虫。在稻瘟病和稻曲病常发区及感病品种种植区,选用枯草芽孢杆菌制剂、春雷霉素预防稻瘟病,井冈?蜡芽制剂、井冈霉素预防稻曲病和纹枯病。
9、防脐黄脐黄是因脐橙顶部有脐而成的固有病害,栽培上选择脐小或闲脐的品种。药物防治上,在谢花后期喷1次70%甲基托布津800倍液+50mg/ml“920”,5~6月再喷2次。另外可结合喷施叶面肥。也可用100mg/ml“920”+甲基托布津700倍液涂脐部。
板栗栗实蟓是板栗生长过程中出现的一种虫害,严重影响了板栗的生长,降低了给板栗的品质和产量。本文就板栗栗实蟓的危害症状、发生规律和防治方法为大家做了详细的总结,详情如下:1、危害症状栗实蟓以幼虫取食板栗果实,严重被害年份,常在短期内将栗果食空,并诱致菌类寄生,以至采收后难以贮存运销。