Plot Size and Shape in Relation to Soybean Resistance for Velvetbean Caterpillar (Lepidoptera: Noctuidae)

Autor:	Joe Funderburk, D. C. Herzog, R. D. Barnett, K. Hinson, A. R. Soffes
Rok vydání:	1990
Předmět:	Ecology biology Resistance (ecology) General Medicine biology.organism_classification Lepidoptera genitalia Anticarsia gemmatalis Agronomy Insect Science Botany Noctuidae Plot (narrative) PEST analysis Cultivar Caterpillar
Zdroj:	Journal of Economic Entomology. 83:2107-2110
ISSN:	1938-291X 0022-0493
DOI:	10.1093/jee/83.5.2107
Popis:	During 1986, 1987, and 1988, selected plot sizes and shapes were evaluated for suitability in field experiments designed to compare soybean, Glycine max (L.) Merrill, cultivars for resistance to larvae of the velvetbean caterpillar, Anticarsia gemmatalis (Hubner). Plot size or shape did not significantly affect the relative rankings between cultivars in density or percentage of defoliation; therefore, any of the plot sizes or shapes examined in our experiments appear suitable for use in field experiments to compare soybean cultivars for resistance to this defoliating pest. Plot size and shape influenced the mean and precision of density and injury estimates. Estimates of larval density and percentage of defoliation were greater in plots of two or more rows than in one-row and hill plots. Precision of density and percentage of defoliation estimates were best for the plot size of two linear rows each 3 m long. Consequently, a plot size of two linear rows each 3 m long appears the best option for field screening experiments.
Databáze:	OpenAIRE
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