. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 54 MASS. EXPERIMENT STATION BULLETIN 353 greens. Egg laying continues until about mid-August. One to 4 eggs are de- posited, usually at night, in holes 2 to 4 inches deep. The beetles feed during the day. They may be seen feeding on plants until early fall although the peak of the feeding season occurs in late July or early August. The eggs hatch about 2 weeks after they are laid. The larvae then feed on the smaller plant roots. They often grow to be about % to 1 inch long before cold weather. The grubs u
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 54 MASS. EXPERIMENT STATION BULLETIN 353 greens. Egg laying continues until about mid-August. One to 4 eggs are de- posited, usually at night, in holes 2 to 4 inches deep. The beetles feed during the day. They may be seen feeding on plants until early fall although the peak of the feeding season occurs in late July or early August. The eggs hatch about 2 weeks after they are laid. The larvae then feed on the smaller plant roots. They often grow to be about % to 1 inch long before cold weather. The grubs usually feed in the upper 3 inches of the soil, but as winter approaches they go deeper to POINTS AT WHICH JAPANESE BEETLES HAVE BEEN FOUND UP TO AND INCLUDING THE YEAR 1935. ^B AREA CONTINUOUSLY INFtSTED BY NATURAL SPREAD. IVail LOCALIZED COLONIES OR POINTS OF MINOR OCCURRENCE. Courtesy, Bur. Ent, and Plant Quarantine, U. S. Dept. Agr. Control. The Japanese beetle is not an easy insect to control. For best results the cooperative efforts of all persons living in a region of infestation are essential. In Japan where the beetle is native, it is not an important pest, probably because favorable host plants are limited there and native parasites help to hold it in check. The United States Government is introducing the more promising of these parasites to help control the beetle in this country'. Protecting the foliage.â To protect shade trees from defoliation by the adult beetles it is necessary to keep a coating of poison on the leaves just before and throughout the fl>ing season of the beetles. The protection is obtained primarily by repelling the beetles rather than by poisoning them. For this purpose a spray composed of 6 pounds of acid lead arsenate with 4 pounds of wheat flour or IJ^ â pints of light pressed fish oil added to 100 gallons of water is recommended. â In case it is not desirable to use lead arsenate, a spray composed of 3 pounds of aluminum sulf
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