摘要
为明确本地区核桃蚜虫天敌发生情况,找到科学指导预测预报、利用自然天敌、开展天敌昆虫防控蚜虫依据,通过设立监测试验区,研究其种群动态及自然天敌的发生情况,明确了蚜虫发生高峰期为5月下旬到6月初,全年仅一个高峰期,其天敌主要为异色瓢虫(Harmonia axyridis)、七星瓢虫(Coccinella septempunctata)、龟纹瓢虫(Propylaea japonica(Thunberg))、黑带食蚜蝇(Episyrphus balteatus De Geer)、烟蚜茧蜂(Aphidius gifuensis Ashmead)、饰草蛉属昆虫(Semachrysa),瓢虫科昆虫为主要优势天敌,异色瓢虫是优势度指数为0.4947的优势种;异色瓢虫种群同蚜虫种群具有紧密的跟随作用,种群数量先随蚜虫数量的增加而增加,又随蚜虫数量下降而下降,迟于蚜虫发生数量达到峰值,符合捕食性天敌对害虫的跟随效应。
In order to clarify the occurrence of natural enemies of Juglans sigillata aphid,find scientific guidance for prediction and utilizing natural enemies to prevent and control of aphids,this study established a monitoring experimental area to study the population dynamics and the occurrence of natural enemies.The results showed that the peak period of aphid occurrence was from late May to early June,and there was only one peak period throughout the year.The main natural enemies were Harmonia axyridis,Coccinella septempunctata,Propylaea japonica(Thunberg),Episyrphus balteatus De Geer,Aphidius gifuensis Ashmead and Semachrysa.The Coccinellidae was the dominant natural enemy,and Harmonia axyridis was the dominant species with a dominance index of 0.4947.The population of Harmonia axyridis had a close following effect with the population of aphids.The population number first increased with the number increase of aphids,and then decreased with the number decrease of aphids,which reached the peak later than the occurrence of aphids,and was consistent with the following effect of predator pests.
作者
谢青海
杨进波
易小光
字红军
杨月红
杨士达
XIE Qinghai;YANG Jinbo;YI Xiaoguang;ZI Hongjun;YANG Yuehong;YANG Shida(Weishan Forestry and Grassland Bureau,Weishan,Yunnan 672401,China;Yunnan Gerui Biotechnology Co.,Ltd.,Midu,Yunnan 675601,China)
出处
《林业调查规划》
2023年第3期97-100,221,共5页
Forest Inventory and Planning
关键词
核桃
蚜虫
优势天敌
烟蚜茧蜂
巍山县
Juglans sigillata
aphid
dominant natural enemy
Aphidius gifuensis Ashmead
Weishan County
