. Circular. Insect pests; Insect pests. Circular No. 155. Issued October 5, 1912. United States Department of Agriculture, BUREAU OF ENTOMOLOGY. L. O. HOWARD, Entomologist and Chief of Bureau. INSECTS INJURIOUS TO MUSHROOMS. By C. II. PoPENOE, s Entomological Assistant. Cultivated mushrooms, especially during warm Aveather, are at- tacked by several species of insect pests Avhich frequentl}'^ destroy an entire crop, or so curtail the production as to make the industry unprofitable. Although this injury is at times serious, little interest has been taken by entomologists in the matter of its co
. Circular. Insect pests; Insect pests. Circular No. 155. Issued October 5, 1912. United States Department of Agriculture, BUREAU OF ENTOMOLOGY. L. O. HOWARD, Entomologist and Chief of Bureau. INSECTS INJURIOUS TO MUSHROOMS. By C. II. PoPENOE, s Entomological Assistant. Cultivated mushrooms, especially during warm Aveather, are at- tacked by several species of insect pests Avhich frequentl}'^ destroy an entire crop, or so curtail the production as to make the industry unprofitable. Although this injury is at times serious, little interest has been taken by entomologists in the matter of its con- trol, so that there is practically no available economic literature on the subject. This circular is of a preliminary nature, as the investigation of all insects injurious to mushrooms may not be completed for some time. The insects which usually attack culti- vated mushrooms, and those of which com- plaints are most frequently made, may be divided roughly into four classes, namely, mushroom maggots, mites, springtails, and sowbugs. Of these the maggots are the most generally injurious, the mites follow in order of importance, owing to the difficulty with which their eradication is accomplished, and then come springtails and sowbugs in the order named. MUSHROOM MAGGOTS. (Sciara multiset a Felt et al.) The injurious forms commonly known as "mushroom maggots" are small whitish or yellowish-white maggots usually having l)lack heads. 50985°—Cir. 155—12 1. Fig. 1.—A mushroom flj-, Aphi- ochccta alhidihaltcriis: Male. Much euhirged. (Original.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology. Washington, D. C. : The Bureau
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