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U.S. DEPARTMENT OF AGRICULTURE 







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Figure 7. — Ghaetexorista javana, a para 



site of the oriental moth. Adult, X2. 



are light reddish brown. The moths are active from the latter 

 part of June until the latter part of July. The young larvae begin 



to appear during the early part of 

 July but the last of them do not 

 complete their growth until the 

 first of October (Boston. Mass., 

 and vicinity). With each succeed- 

 ing molt, the larva takes on more 

 variety of color, hence when ap- 

 proaching maturity it has mark- 

 ings of yellow, blue, green, and 

 purple. 



Cocoons are being formed in the 

 axils of the branches and twigs 

 between early August and early 

 October. The most favored food 

 plants are Norway maple (Acer 

 platanoides L.), sycamore maple 

 (A. jjseudopjatanus L.), wild 

 and cultivated cherry and plum 

 (Primus spp.), apple (Mains spp.), and pear (Pi/rus spp.). 



As a result of liberating, in 1929 and 1930, approximately 85,000 

 adults of Ohaetexorista javana B.B., a tachinid parasite from Japan, 

 this parasite has become firmly established and is exerting much in- 

 fluence toward con- 

 trol, as evidenced by 

 a gain in average par- 

 asitization from 0.78 

 percent in 1930 to 

 52.43 percent in 1932- 

 33. This control was 

 further observed in a 

 decided c decrease in 

 the number of host 

 cocoons present dur- 

 ing the latter year. 



The oriental moth 

 can also be controlled 

 in the early larval in- 

 stars (August 1-15) 

 by spraying with lead 

 arsenate at the rate 

 of 3 pounds to 100 

 gallons of water with the addition of fish oil or linseed oil. as an 

 adhesive, in the proportion of 4 ounces, or one fourth pint, to each 

 pound of lead arsenate used. After August 15. when the larvae are 

 one half or more grown, an additional pound of poison should be 

 added with a proportional increase of sticker. 



Figure S. — A. Cocoon and detached cap of the oriental moth, 

 showing pupal case of Ghaeteworista javana; B. pupal 

 case of C. javana removed from the host cocoon. X2. 



U. S. GOVERNMENT PRINTING OFFICE: 1932 



For sale by the Superintendent of Documents, Washington, D.C. 



Trice 



