Mean total consumption of peppermint foliage for Peridroma saucia (Hubner) instars 3-6 was 2.3± 1.2, 7.2± 2.5, 31.5± 5.0, and 133.6± 25.4 cm2, respectively. Total consumption of 174.4 cm2 was equivalent to 26.7 peppermint leaves. Instars 5–6 consumed 94.5% of the total foliage consumed during development of instars 3–6 (25.3 leaves). Mean number of days for development of instars 3–6 was 3.2±0.4, 3.9±0.4, 4.8±0.9, and 10.0±2.0, respectively. Peppermint plant samples (1000 cm2 soil surface area) were used to estimate mean leaf size (6.5± 1.4 cm2), total leaf area/l000cm2 (6247± 1105 cm2, and mean oil yield/1000cm2 (0.8±0.1 ml). It was estimated that 0.9 5th and 6th instars /l000 cm2 would cause 2.4% defoliation which was equivalent to the economic injury level for variegated cutworm on peppermint based on an oil value of $22/kg and a total cost of insecticide treatment of $45/ha.
Document Type: Research Article
Publication date: August 1, 1980
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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.