5B() EXPERIMENT STATION RECORD. 



;iiul pencil tiers wtMV spiaved with crude oil in Viirious forms without 

 iniurv exco])t when it was undiluted, and yood results were also 

 oljtuiiied on plums. No iujurv was produced from a 20 pci" cent 

 mixtur(> applied in July. Wdmle-oil soap also g-ave good results in 

 destroying the San Jose scale when applied at the rate of li l])s. per 

 gallon of Avater. Lime, sulphur, and salt was applied April 7 to 

 about 60 trees, but the period following w^as very rainy and it appeared 

 to have but little value. Orchardists in the same neighborhood, how- 

 ever, had excellent results from this insecticide. 



A. L. Quaintance gave Further Notes on the Lime, Sulphur, and 

 Salt Wash in Maryland. The author's previous report that this treat- 

 ment was inetiective was reversed by later observations. The effect- 

 iveness of the insecticide persisted for several months. 



The lime-sulphur-salt mixture was also discussed by W. E. Britton. 

 Pear, peach, quince, and plum trees in Connecticut w-ere sprayed 

 with this mixture in April. In June the percentage of living scales 

 varied from zero to 7 per cent. The mixture was as effective as any 

 other insecticide, and was used by orchardists on large orchards with 

 good results. During a prolonged discussion of this subject, partici- 

 pated in by various members, C. L. Marlatt stated his belief that at 

 present the best remedies for San Jose scale are the lirae-sulphur-salt 

 mixture, pure kerosene, and kerosene emulsion. 



C. B. Simpson reported Observations on the Life Histoiy of the 

 Codling Moth, illustrated })y lantern slides. In the author's experi- 

 ments it was found that ^ to i of the eggs were laid on the fruit, 

 while most of the eggs were laid on the leaf; the larvaj mav come 

 to maturity in the leaves without the presence of apples. About 

 80 per cent of the first generation of larvaj were found to enter at the 

 calyx, and 28 per cent of the second generation. The average length 

 of life of the moth was found to be 4 days. It is believed that there 

 are 2 generations per year. A period of 50 days was noted Ijetw^een 

 the maxinuuu appearances of larvse. With regard to the broods of 

 this moth, it is stated that there are probably 1 in Canada, New Jersey, 

 and parts of Idaho, 2 in Oregon and the Upper Austral Zone in gen- 

 eral, and 3 in the Lower Austral Zone. 



In a note on A Criticism upon Certain Codling Moth Investigations, 

 F. L. Washburn gave special attention to a criticism by Cordley and 

 Gillette of his work in Oregon. The author believes that the number 

 of broods of the codling moth in western Oregon is still in doubt. The 

 same author read a paper on the Distribution of the Chinch Bug in 

 Minnesota, showing that during the past season it was confined to the 

 southern parts of the State. This limited distribution it is believed is 

 determined partly by the methods of farming employed in different 

 parts of the State. 



J. Fletcher discussed the question Can the Pea Weevil ))e Extermi- 

 nated ? It was argued that, since the pea weevil has no other food plant 



