Selected Preharvest Morphological Characteristics of Soybeans Stressed by Simulated Green Cloverworm (Lepidoptera: Noctuidae) Defoliation and Velvetleaf Competition
Authors: Higgins, R. A.; Pedigo, L. P.; Staniforth, D. W.
Source: Journal of Economic Entomology, Volume 76, Number 3, June 1983 , pp. 484-491(8)
Publisher: Entomological Society of America
Abstract:The separate and combined effects of velvetleaf, Abutilon theophrasti (Medic.), competition and simulated green clover worm (SGCW), Plathypena scabra (F.), defoliation on soybean Morphological development were evaluated in a 3-year field study. Statistical confirmation of velvetleaf competition stress was limited to soybeans in weed-proximate positions. Preharvest, weed-induced reductions in nodes with unrolled and fully developed leaves (1981 only) and transient effects on leaf area development were statistically significant. In comparison, the SGCW defoliation procedure consistently reduced soybean leaf area, height, and preharvest lodging scores. Nodal development and lower-leaf abscission lagged slightly in 1980 defoliated plots. Defoliated plants did not exhibit 'compensatory regrowth.' No treatment altered soybean stand counts, branching, reproductive phenology, or gravimetric soil moisture Determinations significantly. Actual statistical confirmation of velvetleaf x SGCW treatment interaction swash not achieved in this study.
Document Type: Research Article
Publication date: June 1983
- Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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