360 EXPERIMENT STATION RECORD. 



normal growth in the cornfiekls of the badly infested area. While a con- 

 siderable injury is inflicted by grain moths, both before and after the corn is 

 harvested, the principal injury after harvesting is attributable to various 

 species of Coleoptera, among which six have been particiilarly abundant. 



It was found that any treatment which insured the destruction of all 

 emerged adults of the rice weevil was very likely also to destroy the un- 

 emerged stages, with the possible exception of the egg. The percentage of 

 moisture content in seeds is important as affecting their degree of resistance 

 to the carbon disulphid and it appears that the temperature prevailing at the 

 time treatment is made has much to do with the effectiveness of a given dosage. 

 The imporant results obtained from the experiments are summarized as follows: 

 " Grain infesting insects may be destroyed with cai'bon disulphid, cheaply and 

 effectively, by even an application of 5 lbs. per 1,000 cu. ft. in exceptionally 

 tight compartments, while the temiierature is above 70° F. It requires but a 

 few hours to kill the weevils if a strength of gas equal to one-quarter of a 

 saturated atmosphere can be maintained, and provided the temperature is high 

 enough to insure a considerable degree of vital activity on the part of the 

 insects. Fumigation work with temperatures ranging below 60° ap[)ears to be 

 largely ineffective and inadvisable. It is estimated that at most the expense 

 of treatment will average less than a cent per bushel." 



In discussing Notes on Spraying Experiments for the Oyster Shell Scale in 

 Montana, R. A. Cooley reported (pp. .57-64) tests made of various insecticides 

 aiiplied at 3 different periods of develojiment namely (1) Before hatching and 

 before the buds had openetl ; (2) early in the hatching i)eriod, and (.S) late in 

 the hatching period. He concludes that the eggs are unaffected by the appli- 

 cation of lime-sulphur solutions previous to the opening of the buds. " On 

 trees so sprayed the j'oung were killed very soon after hatching. The inter- 

 vention of rain storms before the hatching of the eggs may more or less affect 

 the value of the treatment. It is indicated -that emulsions of linsecnl oil and 

 cotton-seed oil may be useful for the treatment of this Insect while in the egg 

 stage and during the hatching period." 



Proceedings of the eighth annual meeting of horticultural inspectors 

 (Jour. I'Jcoii. Ent., S (l!)10), No. 1, pi). Go-S't). — In opening the eighth meeting 

 at Boston, 1910, F. L. Washburn discussed (pp. 69-71) the work of the^ associa- 

 tion. 



Brown-tail Moth on Imported Nursery Stock was the subject of a paper by 

 G. G. Atwood, of New York (pp. 71-76), in which the inspection work as carried 

 on in that State was discussed. Large numbers of winter nests of brown-tail 

 moths were found during the spring of 1909 in importations of nursery stock 

 from France. Out of S(i0 shipments with a total of 4.566 packages of various 

 sorts insiiected, 707 boxes and 2 bales were burned, and 7,000 nests destroyed. 

 An infestation of nursery stock on a large private estate in Westchester County, 

 brought about through shii)ment of Crataegus late in the fall of 190S from an 

 eastern State, was stamped out. 



European Conditions as Affecting Imported Nursery Stock were described 

 by L. O. Howard (pp. 76, 77). He announced that a governmental inspection 

 service would be established in France under the directictn of Dr. Paul Marchal, 

 which will enable the issuing of such certificates as will guarantee freedom 

 from insect pests. 



A paper (m Increasing the Demand for Orchard Insiicction was presented by 

 N. E. Shaw, of Ohio (pp. 77-80), and Notes on the State Nursery Laws of Okla- 

 homa and Their Effect, by C. E. Sanborn (pp. S2-S4). 



Ninth report of the state entomologist, 1909, W. E. Britton (Connecticut 

 State /S7«, liitt. W09-10, j)t. -J, pp. VI+323-31Jf, pis. 16, figs. .'>).— The insiiectiou 



