Mold Control in Insect Rearing Media: Survey of Agricultural Fungicides and Evaluation of the Use of Humectants

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Abstract:

Thirty-two agricultural fungicides were screened for their ability to control Aspergillus niger van Tieghem growth in insect rearing media, Seven were selected for testing in the rearing of the tobacco budworm, Heliothis virescens (F.). The most effective and least toxic were ABG-2000R (p-Tolyldiiodomethyl sulfone), Busan 72AR 2-(Thiocyanomethylthio)benzothiazole), and thiram, which permitted only 6–8% loss to mold and allowed pupation rates of 77–82%. Dikar® (blend of manzeb and dinocap), maneb, and manzeb were less effective and more toxic. Bunema inhibited mold contamination but killed all larvae before pupation. All compounds tested prolonged larval development and usually decreased pupal weights. Mold control by lowering the water activity of the rearing medium was evaluated, and propylene glycol was tested in vivo. Concentrations of this humectant sufficient to prevent Aspergillus growth were toxic to larvae.

Document Type: Research Article

Publication date: August 1, 1979

More about this publication?
  • 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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