EXPERIMENT STATION REPORT. 533 



may be made if the soluble oils are used, and the dilution for the 

 first spraying may be 1 to 25. If only one spraying is made it should 

 be 1 to 20 If the K.-L. is used and two applications are made, 20 per 

 cent kerosene will be sufficient for each. If the lime and sulphur 

 mixtures are to be used one application only,, at full winter strength, 

 is advised; but in the case of badly-infested trees a second application 

 may be made in spring. . 



It is believed that the practice here recommended will give much 

 better results than any that has heretofore obtained. 



THE PEACH SOFT SCALE. 



In 1904 specimens of small, browii, soft scale were sent in from 

 Bridcreton, with the report that it was plentiful and mprious m 

 .ome peach orchards. In the summer of 1905 further commumcations 

 were received, and after some correspondence I sent Mr. Dickerson 

 to investigate, on the occasion of a nursery inspection trip, and later 

 visited the infested territory myself. The insect turns out to be a 

 European species, which up to the present period had not been known 

 to exist in New Jersev. and even now seems to ])e confined to a small 

 area lying southward from Bridgeton. As there is a possibility of its 

 .pread it is deemed well to give, on another page, a brief account of 

 the life cvcle of the species, taken chiefly from a paper on "Some 

 Scale Insects of the Orchard," published by Dr. L. 0. Howard m 

 the Year-Book of the United States Department of Agriculture for 

 1904. 



SHADE TREE NOTES. 

 There has been much complaint of injury to shade trees of many 

 kind^ and the general tendency has been to charge insects as the 

 cause of the trouble, but not justly in all cases. Tulip trees have 

 in manv places lost a large part of their foliage, which turned yellow 

 and .dropped. Some of the leaves had one or more large brown or 

 blacldsh blotches, and when these were sent to me I recognized the 

 work of a leaf -miner, the larva of a small fly : but this did not account 

 for the dropping of that vast majority that showed none of these 

 spots. Conifers on lawns and in parks were also attacked by some 

 disease that caused them to turn brown and die. arid on these a little 

 hpidopterous borer in the pine needles, or a plant-louse at their base, 



