INSECTS ETC., INJURIOUS TO VARIOUS CROPS 1225 



fitted with a special i HP gasoline apparatus which serves to maintain a 

 pressure of about 120 lbs during the operation ; 2) applications of aceto-arse- 

 nite of copper in powder, applied in the morning when the leaves are still 

 covered with dew, which facilitates the adhesion of the preparation ; 

 3) the use of light traps (electric or acetylene lamps near which are placed re- 

 ceptacles containing water to which parafin has been added) ; in this way 

 I 000 000 adult insects were captured in a single season. 



954 - Epochra canadensis, a Dipterous Pest of Ribes in America. — whitxey 



ly. A. in Monthly Bulletin of State Commission of Horticulture, Vol. V, No. -i, pp. 152-157, 



Fig- 52-55. Sacramento, Cal., 1916. 



The yellow currant and gooseberry-fruit fl}' {Epochra canadensis Loew) 

 causes great injury to Rihes spp. in numerous localities of the United States 

 and Canada. The female, by means of its sharp-pointed ovipositor, lays 

 its eggs in the interior of the fruits, and the larvae emerging from them de- 

 vour and spoil the fruits to a large extent. 



As means of control, applications of arsenate of lead are advised at the 

 time of appearance of the adults, according to the following formula : 

 arsenate of lead, 4.9 lbs., molasses, 2.5 galls., water, 82.3 gals. 



955 - Hickory Twig Girdler (Oncideres cingulata), a Coleopterous Pest of 

 D/ospyros r/rg-//? /ana ("Persimmon") in the United States. — See. No. 872 



in this Bulldin. 



Alfredo Ruggeri, gerente responsabile. 



