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wasp, Sphex ichneumonea, L. Kansas bait was most efficient in 

 destroying the grasshoppers, in some cases as many as 95 per cent, 

 being killed. The following spray was also satisfactory : — 3 lb. 

 sodium arsenite, 1| U.S. gals, molasses, 180 gals, water. It is advisable 

 to apply the bait or spray while the insects are still young. 

 . Insect pests of trees were abundant in the vicinity of New York 

 ^ City, especially Scolytus {Eccoptogaster) quadrispinosus, Say (hickory 

 bark-beetle) and Agrilus bilineatus, Web. (Hned chestnut borer). 

 Investigations were made as to the effect of a well-known oil compound 

 on the beetles and on the host tree. Six out of the ten trees tested 

 died as the result of treatment. The trees were young and thin-barked 

 and consequently may have been more liable to injury than more 

 mature ones. In any case it is not advisable to use oils or oily com- 

 pounds on the bark of living trees. Malacosoma americana, F., and 

 M. disstria, Hb. (tent caterpillars) caused serious injury in certain 

 districts. Pissodes strobi, Peck (white pine weevil) showed an increasing 

 abundance on young trees. On small areas the most successful method 

 of control was hand-picking. Tortrix (Archips) cemsivorana, Fitch 

 (cherry worm) occurred during early summer on choke-cherry and in 

 one case migrated from this host to the Lombardy poplar. Dioryctria 

 ahietella, Zinck., Avas found in the buds and young twigs of Austrian 

 pine at Rochester. Tibicen septemdecim, L. (periodic cicada) appeared 

 in certain localities, but without doing serious damage. 



Among insect pests of fruit trees, Rhagoletis pomonella, Walsh (apple 

 maggot) was found to have become abundant in the Hudson River and 

 other districts. There was some evidence for believing that the 

 apphcation of an arsenical spray during the summer was effective in 

 checking this pest. Heterocordylus malinus, Rent, (red bug) and 

 Lygidea mendax, Rent, (lined red bug) injured apples in the Hudson 

 Valley. Attack resulted in the discoloration of the leaves and fruit 

 and in the hardening and irregularity in shape of the latter. The most 

 suitable spray consisted of 1 pt. tobacco extract in 100 gals, water 

 together with hme-sulphur wash, 1 to 25, with the addition of lead 

 arsenate, applied just before the blossoms opened. Aspidiotus 

 perniciosus, Comst. (San Jose scale) was less numerous in the Hudson 

 Valley than in previous years. This fact however does not justify 

 the abandonment of spraying in commercial orchards. Agrilus 

 sinuatus, OUv. (sinuate pear borer) is spreading into New York from 

 New Jersey, and appeared in 1915 in several localities. Adult beetles 

 emerge during May to feed on the fohage and can at this time be con- 

 trolled by an arsenical spray. A deterrent wash consisting of from 

 60 to 80 lb. hme, 20 lb. copper sulphate and 100 gals, water is being 

 tested. Taeniothrips {Euthrips) pyri, Dan. (pear thrips) caused very 

 severe damage in the Hudson Valley. In one orchard sprapng was 

 carried out about 24th April with a mixture consisting of from 75 to 

 80 lb. lime, 100 gals, water and f pt. Black Leaf 40. Large numbers of 

 thrips were killed, but the results would have probably been even more 

 satisfactory had the treatment been carried out earlier. Psylla 

 pyricola, Forst. (pear psylla) continued to be injurious in the Hudson 

 Valley, especially in those parts in which favourable hibernating places 

 were present. Conotrachelus crataegi, Walsh, (quince curculio) 

 occurred in some places. Evidence seems to show that this insect 

 can be controlled by the application of a poisoned spray as soon as the 



