THE GREEN JUNE BEETLE. 45 



The adults of this species observed at Portsmouth, Va., during 

 1915 show a very considerable reduction in numbers, undoubtedly due 

 to the large number of larvae which had been captured in the fall 

 of 1914. 



SIMPLE TRAPPING METHODS. 



The grubs have also been successfully captured in cold frames by 

 the use of empty tomato cans. Mr. Trepass experimented on a larger 

 scale on lawns and gardens at Glen Cove, Long Island, by setting 

 boxes of the size of ordinary flats, about 3 inches deep, just below the 

 surface, making the ground smooth around the boxes. During Sep- 

 tember he caught no less than 146 gallons, or nearly 240,000 of these 

 insects. 



Gas Lime. 



Gas lime, which can be procured gratis for the expense of hauling, 

 is well worthy of a trial. It should be applied in September or 

 October for most vegetable crops ; and for strawberry beds, potatoes, 

 or vegetable crops, as soon as possible after the crop is made. One 

 caution is to be observed, i. e., gas lime is dangerous to plant life; 

 hence, it should be used experimentally on a small scale before em- 

 ploying it in entire fields. 



INEFFECTIVE OR IMPRACTICAL METHODS. 



A few remarks should be added in regard to what should be 

 termed " ineffective methods " — remedies which have been suggested 

 at times but which knowledge of the habits of the species show to be 

 unworthy of trial, or which are impractical on account of their cost. 



In 1895, Dr. J. B. Smith (25) claimed that kainit mixed with lime 

 in the proportion of 1 ton of the former to 1,000 bushels of the latter 

 proved fairly successful where tested in some parts of New Jersey. 

 The high price of mineral fertilizers at the present time prohibits 

 their use, otherwise they could be recommended in lieu of manure 

 which, it is well known, serves to attract the female beetles for 

 depositing their eggs. 



Among the direct remedies which have been found most useful 

 against the common white grubs (Phyllophaga et al.) there is 

 scarcely one, with the possible exception of kerosene emulsion and 

 carbon disulphid, which will be found effective against the grubs of 

 this species. 



Plowing. 



Plowing seems inapplicable in the case of these grubs, except pos- 

 sibly in late May or June, when they are in the prepupal stage or have 

 recently pupated and are consequently soft and delicate. The plow- 



