摘要
【目的】研究4种常用缓释载体对梨小食心虫Grapholitha molesta性信息素的释放速率及田间迷向效果,为制作梨小食心虫迷向剂筛选合适的缓释材料。【方法】采用气相色谱法测定野外条件下梨小食心虫性信息素在PE管、PE瓶、PE袋和PVC管4种载体中的释放速率,并通过田间试验研究4种缓释载体处理下桃园梨小食心虫的迷向率和持效期。【结果】在测试期内,PE管和PE瓶中梨小食心虫性信息素释放速率范围分别为0.32-1.62 mg/d和0.59-2.73 mg/d,两种载体持效期均达到5个月;PVC管的释放速率在0.71-6.86 mg/d之间,田间持效期3个月;PE袋释放速率1.14-19.27 mg/d,持效期仅1个月。4种缓释载体中梨小食心虫性信息素释放过程均符合一级动力学方程,4种载体的半衰期由高到低顺序为:PE管>PE瓶>PVC管>PE袋。在持效期内,4种缓释材料的迷向效果均达到90%以上。【结论】野外条件下PE管和PE瓶中梨小食心虫性信息素释放速率较稳定,持效期长,迷向率高,适合作为制作梨小食心虫的迷向剂的缓释材料。
[Objectives]To determine which of four commonly used pheromone dispensers has the best pheromone release rate and causes the most mating disruption to Grapholitha molesta.[Methods]The release rates of G.molesta sex pheromones from PE tubes,PE bottles,PE bags and PVC tubes were measured under field conditions with gas chromatography.Field trials were carried out to determine the efficacy and longevity of control achieved by each of the four types of dispenser.[Results]The release rate of G.molesta sex pheromone from PE tubes and PE bottles ranged from 0.32 mg/d to 1.62 mg/d and 0.59 mg/d to 2.73 mg/d,respectively,and the effective duration of pheromone release from these dispenser types was up to 5 months.The release rate from PVC tubes was between 0.71 mg/d and 6.86 mg/d within a validity period of three months.Pheromone in PE bags lasted only one month,and its release rate ranged from 1.14 mg/d to 19.27 mg/d.The release of G.molesta sex pheromone from the four dispensers was consistent with the first-order kinetic equation and the half-life of pheromone in the four dispensers can be ranked,from high to low,as follows:PE tube>PE bottle>PVC tube>PE bag.All four types of dispenser achieved>90%mating disruption.[Conclusion]PE tubes and PE bottles are the best dispensers of G.molesta pheromone because of their relatively stable release rate and long duration of pheromone release under field conditions.
作者
相会明
刁红亮
李先伟
赵志国
马瑞燕
XIANG Hui-Ming;DIAO Hong-Liang;LI Xian-Wei;ZHAO Zhi-Guo;MA Rui-Yan(Shanxi Agricultural University,College of Plant Protection,Taigu 030800,China)
出处
《应用昆虫学报》
CAS
CSCD
北大核心
2022年第2期311-317,共7页
Chinese Journal of Applied Entomology
基金
国家重点研发计划(2019YFD1002102)
山西省应用基础研究计划(201901D111229)
国家现代农业产业技术体系(CARS-28-19)。
关键词
梨小食心虫
迷向
释放速率
缓释载体
持效期
Grapholitha molesta
mating disruption
release rate
dispensers
duration
