Ploughing as a Factor in Control of the European Corn Borer (Pyrausta Nubilalis hubner) In Ontario Canada
Author: CRAWFORD, H. G.
Source: Journal of Economic Entomology, Volume 17, Number 1, February 1924 , pp. 132-141(10)
Publisher: Entomological Society of America
Abstract:Clean ploughing either in the fall or spring is the important control measure in the Canadian infestation in the disposal of that portion of the European Corn Borer population left in the field in the stubble and refuse after the removal of the crop. The larvae in the material ploughed down practically all come to the surface sooner or later with a very slight mortality. When the ploughing is done in the very early fall most of the larvae come to the surface before winter. With later ploughings an increasing proportion fail to come to the surface and remain below ground till spring. Following spring ploughings the larvae come to the surface in a similar manner and at a rate depending somewhat upon the date of ploughing. In all cases the upward movement is practically complete by June 5th. After the larvae come to the surface, which they do at night, they wander about somewhat; a small proportion enter the crop refuse if any is upon the surface and eventually come to maturity as moths, the balance, or in the absence of suitable shelter all the larvae, settle under clods of earth or in the soil and fail to produce sufficient moths to be of real importance. The larvae in the open soil simply disappear and little is known quantitatively about the various factors which cause this reduction. In a field where the refuse contained 33,800 larvae per acre, clean ploughing in spring or fall resulted in the virtual annihilation of the larval population by the time that pupation would normally be expected the following year.
Document Type: Research Article
Publication date: February 1, 1924
- 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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