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The Germination of Resting Spores of Entomophthora virulenta1 Hall and Dunn2

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Laboratory tests have shown that about 2 to 5% of the resting spores of Entomophthora virulenta from pure cultures are ready to germinate when removed from the dry state and placed on artificial media, The germinating spores do not need the influence of chitin-splitting microorganisms or a lengthy period in a moist environment in order to start their growth, but they are responsive to high humidity conditions since a progressive increase in germination was noted as the period that the spores here soaked was increased, Considerable germination was noted following 10-minute exposures to temperatures up to 93. while no growth occurred after a 06-hour exposure to a temperature of 85.

Document Type: Research Article

Publication date: February 1, 1959

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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.
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