摘要
对浙西北梨区梨花瘿蚊幼虫的发生危害与化学防治策略进行了研究,结果表明,梨花瘿蚊幼虫发生在2月底至3月底,危害期为15～20d。梨树小花蕾露出时间越早,梨花瘿蚊幼虫发生就越早。气候条件明显影响梨树的开花时期和梨花瘿蚊幼虫的发生危害时期。80%敌敌畏EC和90%敌百虫TK对梨花瘿蚊幼虫的防效最好,在药后3～7d防效分别为92.7%～96.4%和87.1%～93.2%;其次为5%氟虫腈SC和40%毒死蜱EC,防效分别为84.7%～88.8%和78.2%～89.7%;而1.8%阿维菌素EC、37%氯·马EC、17%阿维·毒EC的防效很差,在64.4%以下,尤其是阿维·毒基本无杀虫效果。7种药剂的保花效果次序为敌敌畏、敌百虫>氟虫腈、毒死蜱>阿维菌素、氯·马、阿维·毒。防治梨花瘿蚊幼虫的最佳时期是少部分梨花花苞开始露白的时间。
Occurrence of pear blossom gall midge, Dasineura sp., and its chemical control strategy in Northwest Zhejiang province were investigated. The results showed that Dasineura sp. emerged from the end of February. and ended at the end of March, and damage period could reach 15 to 20 days. But different year had different occurrence time. The earlier the small bud appeared, the earlier the insect pest occurred. Occurrence of Dasineura sp. had closely relationship with florescence length of pear. Climate condition could affect floresceuce length of pear and occurrence and damage duration of Dasineura sp. The results of control efficacy of seven insecticides to the pest indicated that 80% dichlorvos EC, 90% dipterex TK had best control effieacy to Dasineura sp. larvae during 3 to 7 days after treatment, and their control effects were 92.7% to 96.4% and 87.1% to 93.2%, respectively. 5% fipronil SC and 40%chlorpyrifos EC were also efficient, and their control effects were 84.7% to 88.8% and 78.2% to 89.7%, respectively during 3 to 7 days after treatment. While 1.8% avermeetin EC, 37% eypermethrin, malathion EC and 17% avermeetin, chlorpyrifos EC had no obvious control efficacy （〈64.4%）, especially avermectin .ehlorpyrifos. In order of the efficacy to protect flower, 7 insecticids were dichlorvos, dipterex 〉 fipronil, ehlorpyrifos 〉 avermectin, cypermethrin-malathion, avermectin＇chlorpyrifos. Further experimental results showed that optimum period for control of Dasineura sp. were appearance time of very small part petals.
出处
《果树学报》
CAS
CSCD
北大核心
2010年第3期416-421,共6页
Journal of Fruit Science
基金
杭州市农业科技攻关项目(20070632B05)
关键词
梨花瘿蚊幼虫
发生规律
化学防治策略
防治效果
保花效果
Larvae of Dasineura sp.
Occurrence
Chemical control strategy
Control efficacy
Flower-protected effect
