VJ20] ECONOMIC ZOOLOGY — ENTOMOLOGY. 559 



larval stnijos, moans of conliol undtT way, iii^-viitioii of injury, iialuial cne- 

 mu's, etc. 



"The Japanese IxhHIo was introduced into Burlington County, N. J., from 

 Japan in soil about the roots ot' plants previous to 191G. It is now known to 

 occur in the United States only in Burlington and Camden Counties in New 

 Jersey. The insect has shown that it can increase at a menacing rate and may 

 become a dangerous pest to a variety of croi)s, and it will prol)ably be a heavy 

 charge on agricultural iimduction unless checked by artificial or natural means. 



" It has a one-year life cycle, wintering in the ground as a grub and occur- 

 ring as a beetle above ground for several niojiths during the summer and fall. 

 The beetles feed on a great variety of weetls and cultivated crops, skeletoniz- 

 ing the foliage and riddling the Uowers. The eggs are laid and the grubs 

 flourish in low ground that is rich in humus and preferably covered with grass 

 or other vegetation. Roadsides, fence rows, headlands, and creeks, grown up 

 with gra.ss and weeds, are favorite breeding grounds for the Japanese beetles, 

 as well as many other pests, and are therefore a nuisance of the worst type. 

 Cooperation of all resid(nits of the area now infested, and that surrounding, in 

 eliminating headlands and fence rows and destroying the wild vegetation along 

 creeks and roadways, is urged. Also, individuals are asked to cooperate so 

 far as practicable in the cropping and cultivation of fields . . . and in the 

 collection and destruction of the beetles. The work of controlling the Japanese 

 beetle as planned consists in the prevention of spread by barriers and quaran- 

 tine measures, the discovery of practical control measures, and the introduction 

 of natural enemies from .Tapan." , 



The control of the strawberry leaf beetle (Typophorus canellus Fabr. ) , 

 K. N. CoKY and W. C. Teaveks (Maryland Sta. Bui. 236 {1920), pp. 133-136, fig. 

 1). — This beetle, the larva of which is known as the strawberry root worm, has 

 during the past three years severely injuretl strawberry plants in some sections 

 of Somerset County, Md., in many cases entire beds having been destroyed by 

 it. This has led to control experiments, which have shown that both arsenate 

 of lead and arsenate of lime are effective in reducing the insect depredations 

 to a marked degree. The autliors recommend that eithera mixture of 85 per 

 cent hydrated lime with 15 per cent of arsenate of lime or 15 per cent of 

 jirsenate of lead, or a mixture containing G5 per cent hydrated lime, 20 per 

 cent ground Bordeaux, and 15 per cent of either arsenate of lead or lime 

 be applieil. "The first application should be made on or about the first of July 

 and be followed by a second application in three weeks, if no heavy rains 

 intervene. All the applications should be repeated if followed in the course of 

 several days by heavy rains. The plants should be watched carefully and 

 If the injury continues, added applications may be necessary." 



Does experimenting with native predatory insects pay? E. G. Wood 

 {Better Fruit, ?// {1910), No. 5, pp. 6, 7, figs. 3).— This is a brief account of the 

 collection and storing of ladybird beetles found in the orchards of Walla Walla 

 County, Wash., reference to which has been previously made from another 

 source (E. S. R., 41, p. 666). 



The work has led to the conclusion that Si'ptember or October Is the best time 

 to collect the beetle, though it might be possible to collect them during a 

 pi'riod of about 10 days in April. The best method of storing I5 in small boxes 

 with dry excelsior, about 3 lbs. in each box, the boxes being screened on two 

 sides and kept in cold storage at 40° F. By this method, 98 per cent can be 

 brought through the winter in good condition. 



Common storage or outdoor storage is fairly satisfactory if the beetles are 

 liberated about the first of .April. They should be liberated early enough in 

 the spring so that the eggs will be hatching before the aphis begins multiplying 



