摘要
采用自然开放式大田系统调查,对油菜蚜虫混合种群为害损失进行研究,提出一个新的混合蚜群特征的综合度量指标——“累积蚜量为害指数”。在此基础上建立了油菜蚜虫混合种群损失当量及其模似模型,得三类蚜虫的为害当量。即:①苗期,桃蚜:萝卜蚜=1:0.8834;②苔花期,桃蚜:萝卜蚜:甘蓝蚜=1:1.1282:1.3725;③荚果期,桃蚜:萝卜蚜:甘蓝蚜=1:1.7394:2.5298。并组建了混合种群损失(?)量模型与多元回归模型,制订了油菜蚜虫混合种群的复合防治指标。通过对1991—1992年田间实际应用(?)表明,二模型的决策结果具有很好的一致性,并与田间实际状况相符。
The damage of mixed population of rape aphids to rape was studied based on systematic investigation in field condition, the damage index of accumulated aphid number, a new composite criterion reflecting the feature of mixed aphid population, was developed, and the mixed injury equivalent and corresponding simulation modej were consequently established. The injury equivalencies of green peach aphid Myzus persicae(Suizer) : mustard aphid Lipaphis erysimi (Kaitenbach) in seedling stage and green peach aphid : mustard aphid : cabbage aphid Brevicoryne brassicae(Lin-naeus)in bolting-blooming and podding stages were 1 : 0. 8834,1 : 1.1282 : 1. 3725 and 1 : 1. 7394 : 2. 5298. The model of injuny equivalent and multifactorial regression model of mixed population were developed,and the compound action threshold of the mixed population was determined. The results of field examinations in 1991 and 1992 showed that the decision makings by the two models were quite consistent and corresponded to field reality.
出处
《植物保护学报》
CAS
CSCD
北大核心
1994年第1期47-51,共5页
Journal of Plant Protection
关键词
油菜
蚜虫
混合种群
损失当量
防治
rape aphids mixed population injury equivalent compound action threshold damage index of aecumulated aphid humber
