Affiliation:
1. Fruit and Vegetable Insect Research Unit, USDA-ARS, 3706 W. Nob Hill Blvd., Yakima, WA 98902
Abstract
The three key lepidopterous pests of cruciferous crops, Artogeia rapae (L.), Plutella xylostella (L.), and Trichoplusia ni (Hübner) were monitored throughout the growing season at several locations in Washington and Oregon in 1986 and 1987 on collard plants. Populations of these pests differed markedly from location to location and between years. Artogeia rapae was the most abundant, P. xylostella was next in abundance, and T. ni the least abundant and on many dates it was not observed. Seven species of parasitoids were recovered and rates of parasitization varied significantly over time and among locations. Diadegma insulare (Cresson) was the most abundant parasitoid of P. xylostella. It parasitized up to 100% (range 0–100) and accounted for 74–100% of the total parasitization. Cotesia rubecula Marshall was the dominant species attacking A. rapae in Washington (0–50% parasitization) and accounted for 32–100% of the total parasitization. The only parasitoid species recovered from T. ni was Voria ruralis (Fallen) which parasitized from 0–14% of the larvae.
Publisher
Georgia Entomological Society
Subject
Insect Science,Agronomy and Crop Science,Ecology, Evolution, Behavior and Systematics
Cited by
10 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献