Field cage performance of two tachinid parasitoids of the tomato fruitworm on insect resistant and susceptible tomato lines
- 5 April 1993
- journal article
- Published by Wiley in Entomologia Experimentalis et Applicata
- Vol. 67 (1) , 73-78
- https://doi.org/10.1111/j.1570-7458.1993.tb01653.x
Abstract
Rates of parasitism of Helicoverpa (= Heliothis) zea (Boddie) (Lepidoptera: Noctuidae) by two tachinid parasitoid species differing in larviposition habits were measured in field cages on tomato plant lines with or without methyl‐ketone (2‐tridecanone and 2‐undecanone)‐mediated insect resistance. Hosts were placed on resistant or susceptible plants, exposed to parasitoids for 24–48 h, then held on artificial diet for parasitoid emergence. Rates of parasitism by Archytas marmoratus (Townsend) (Diptera: Tachinidae), which larviposits on its host's food plant, were significantly reduced on the resistant plants, relative to those on the susceptible plants. Parasitism by another Tachinid, Eucelatoria bryani Sabrosky, which larviposits directly into its host and does not directly contact the foliage of its hosts' food plant as a small larva, was not affected by the methyl‐ketone mediated resistance.Keywords
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