Chloroplast Number in Leaves of Normal Wheat Plants and Those Infested with Hessian Fly or Treated with Maleic Hydrazide1, 2

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Chloroplasts were counted in leaves of normal wheat plants, those infested with hessian fly(Phytophaga destructor (Say)), and those treated with maleic hydrazide. The chloroplast number decreased in the outer leaves and increased in the inner leaves of the treated plants. In the hessian fly infested wheat plants, the chloroplast counts increased in both inner and outer leaves over those of the normal plants. It appeared that the dark-green color of the inner leaves of hessian fly infested wheat was due to increased chloroplast numbers. It appeared further that the dark-green color of the outer leaves of maleic hydrazide treated plants was due to a greater concentration of chlorophyll per chloroplast.

Document Type: Research Article

Publication date: August 1, 1960

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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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