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A Method and Machine for Detecting Living Internal Insect Infestation in Wheat

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Many methods have been developed for detecting hidden insect infestation in grain. Of these, only the X-ray-radiographic and the cracking-flotation techniques have found any degree of acceptance. Technical difficulties have limited wider acceptance of these methods. Because the grain industry is badly in need of a sound and efficient method, research was conducted to develop such a method.

The techniques (or principles) investigated were light transmittance, f1uorescence, electrical, theological, and chemical responses and reactions. The most promising was a chemical indicator technique in which the body fluids of the insects produced a color reaction with ninhydrin-impregnated filter paper.

The ninhydrin process met the required design objectives of high sensitivity and specificity, suitability to mechanization, and competitive initial and operating cost. The above was first demonstrated on a prototype. An improved unit has been built, which will be field tested in comparison with the X-ray method.

Document Type: Research Article

Publication date: April 1, 1962

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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