New York AGRICULTURAL EXPERIMENT STATION. 441 
PEACH INSECTS. 
BORER. 
(Sannina exitrosa Say.) 
Description.—The adult insects are beautiful moths. The male 
measures about an inch and the female an inch and a half from 
tip to tip of the expanded wings. The general color is deep steel 
blue. The female has a broad band of orange across the abdo- 
men. ‘They appear during May and early June. The eggs are 
usually deposited on the bark at or near the surface of the ground, 
although they are sometimes deposited higher up on the trunk 
and even upon the larger limbs. The eggs are only a few days 
in hatching and the young larve quickly work their way into 
the sap wood where they feed during the remainder of the season. 
They remain dormant during the winter in their burrows, form 
a cocoon and finally issue as moths as above indicated. There is: 
but one brood annually. 
T'reatment.— As preventive treatment numerous washes have 
been suggested. In a series of expriements which included 
a large number of trunk washes Slingerland® reports the best 
_ success with gas tar. The tar was warmed slightly to facilitate 
handling and applied to the trunk. It “apparently kept out 
four-fifths of all the borers, only a small percentage of the trees. 
became infested and no injury resulted to the trees.” Professor 
Slingerland also states that in his experience “the tar did not 
interfere with the growth of the trees in the least.” This treat- 
ment should be combined with the digging out method. He also 
states that im this State the applications of washes, such as gas: 
tar, should be made between June 15 and July 1, and “ should 
remain in perfect working order until October 1.” It should be 
remarked that gas tar is a substance of very variable composition 
and instances are known where disastrous results to the trees: 
followed its use in the manner which is here described. 

35 Cornell Univ. Agr. Exp. Sta. Bul. 186, pp. 217, 224-225. 
