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2024年保护地蔬菜重要害虫生物防治技术方案

2024-03-28 08:33:47 来源:全国农业技术推广服务中心 阅读量:12098 评论

导读:保护地蔬菜害虫种类多,常年发生的主要有蚜虫、粉虱、蓟马和害螨等,虫量大、世代重叠、抗药性高、危害重。

  【农机网 科技创新】保护地蔬菜害虫种类多,常年发生的主要有蚜虫、粉虱、蓟马和害螨等,虫量大、世代重叠、抗药性高、危害重;偶发的有潜叶蝇、棉铃虫、甜菜夜蛾等。利用生物防治技术是保障蔬菜质量安全、推进绿色植保的有效途径。为推动害虫的生物防治工作,特制定本方案。
 
  一、防控目标
 
  保护地蔬菜重要害虫防治处置率90%以上,害虫总体防控效果80%以上,危害损失率控制在10%以内,保障蔬菜生产及产品安全。
 
  二、防控策略
 
  针对保护地蔬菜害虫发生特点,采取“实时监测、提前预防、压前控后、多策并举”策略,以健康栽培、物理隔离和生态调控等技术为基础,以释放天敌和应用生物农药为主要手段,将害虫控制在经济危害水平以下。
 
  三、生物防治应用保障技术
 
  (一)物理阻隔
 
  蔬菜定植前安装防虫网。在棚室旁设置缓冲间,门口和入口及上、下通风口安装60目防虫网,阻断害虫侵入。
 
  (二)健康栽培
 
  1.环境控制。确保保护地温湿度、光照、通风和密闭性控制良好,适宜蔬菜生长。
 
  2.清洁棚室。前茬蔬菜采收后及时拉秧清棚,彻底清除残枝、落叶、落果、杂草、裸根等,于棚外集中无害化处理。密闭熏蒸或药剂均匀喷洒墙壁、棚膜、缓冲间1—2次。
 
  3.土壤消毒。定植前使用土壤消毒剂杀灭病虫源,处理后增施枯草芽孢杆菌、木霉菌等有益菌剂。
 
  4.健身栽培。洁净种苗,合理密植,施用氨基寡糖类、蛋白质免疫诱抗剂等,提升植株抗病虫能力。
 
  (三)生态调控
 
  1.种植蜜源植物。棚间空地种植金盏菊、波斯菊、苜蓿、芝麻和蛇床子等植物。
 
  2. 种植驱避植物。棚内在通风口区种植茴香、万寿菊、除虫菊等植物。
 
  3. 种植诱集植物。茄果类蔬菜定植时,在其种植行的两端和中间位置各种1株甜瓜,每隔4行种植1组,或瓜类蔬菜温室用盆栽的苘麻置于行间,高效诱集粉虱类害虫。
 
  四、生物防治技术
 
  (一)天敌应用技术
 
  定植后,监测害虫种群发生情况,在害虫发生初期即采用相应防治措施。
 
  1.防治粉虱类害虫
 
  天敌品种:丽蚜小蜂等
 
  释放技术:定植后,监测发现害虫即可释放天敌,丽蚜小蜂按2000头/亩,隔7—10天释放一次,连续释放3—5次。
 
  2. 防治蓟马类害虫
 
  天敌品种:小花蝽类、胡瓜新小绥螨、巴氏新小绥螨和剑毛帕厉螨。
 
  释放技术:定植后,监测发现害虫即可释放天敌。小花蝽类天敌按500头/亩,隔7—10天释放一次,连续释放2—4次;或根部撒施剑毛帕厉螨100—200头/平方米,同时叶部撒施巴氏新小绥螨或胡瓜新小绥螨100—200头/平方米,每2周释放一次,连续释放2—3次。
 
  3. 防治害螨
 
  天敌品种:智利小植绥螨、加州新小绥螨、巴氏新小绥螨。
 
  释放技术:定植后,监测发现害螨即可释放捕食螨。叶部撒施智利小植绥螨5—10头/平方米,点片发生时中心株释放30头/平方米,每2周释放一次,释放3次。或叶部撒施加州新小绥螨300—500头/平方米,每周释放一次,连续释放3—5次,或释放巴氏新小绥螨,方法同加州新小绥螨。
 
  4. 防治蚜虫类害虫
 
  天敌品种:蚜茧蜂、草蛉、食蚜瘿蚊、瓢虫。
 
  释放技术:定植后,监测发现害虫即可释放天敌。蚜茧蜂按2000—4000头/亩,或草蛉(茧)按300—500头/亩,或食蚜瘿蚊按300—500头/亩,每周释放一次,连续释放2—3次。或瓢虫(成虫)按1:60益害比释放,或瓢虫(卵)按2000头/亩,释放2—3次。
 
  5. 防治鳞翅目害虫
 
  天敌种类:赤眼蜂类、蠋蝽等
 
  释放技术:定植后,监测发现害虫即可释放天敌。赤眼蜂类按10000头/亩,或蠋蝽按20—30头/亩,隔5—7天释放一次,连续释放3次。
 
  (二)生物农药防治技术
 
  当释放天敌不能够有效控制保护地害虫时,可使用生物农药进行防治,使用前需确定生物农药与天敌的兼容性,降低其对天敌的影响。粉虱类、蚜虫类和蓟马类可选用除虫菊素、苦参碱、鱼藤酮、藜芦根茎提取物、绿僵菌、球孢白僵菌、多杀霉素等药剂;鳞翅目害虫可选用短稳杆菌、苏云金杆菌、印楝素、核型多角体病毒等药剂。
 
  五、注意事项
 
  (一)释放天敌宜在保护地蔬菜上使用,注意天敌不耐储存,应尽早释放,不可置于阳光下暴晒。
 
  (二)释放天敌后,避免施用化学杀虫杀螨剂,2天内尽量减少农事操作,以利于天敌转移到植株上。
 
  (三)有避光、避高温要求的生物药剂宜在阴天或下午4点以后施药。
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