71 



Dr. Kellicott gave some further notes on the distribution and more 

 recent increase in the range of the harlequin cabbage bug in Ohio. He 

 also referred to a bagworm which seems to be distinct from the common 

 species and probably undescribed. 



Mr, Smith referred to the use of pure kerosene on trees in Ohio, and 

 asked whether the Department of Agriculture had conducted any 

 direct experiments showing the effect of the use of this oil undiluted. 



Mr. Marlatt stated that during 1879 some of the elm trees on the 

 grounds of the Department were surrounded with a band of cotton 

 saturated with oil, which resulted in the death of the trees. The later 

 experience with the use of kerosene oil was in the work against the 

 San Jose scale. At Riverside, Md., the owner of a large peach orchard 

 in his attempt to use kerosene emulsion had made an unstable product, 

 and was, when visited, found to be applying practically pure kerosene 

 to the trunk and larger branches. The results of this application were 

 disastrous, but the trees in question were already much weakened by 

 the attacks of the scale. Later in the winter Mr. Marlatt said he had 

 personally, to test the effect of the oil, sprayed some healthy aud vigor- 

 ous peach trees, uninjured, or practically so, by scale, making the appli- 

 cation thoroughly to all parts of the tree with an ordinary spray pump. 

 These trees were killed outright, not surviving the winter. He was 

 firmly of the opinion that an application of kerosene oil to trees, except 

 perhaps where limited to light applications to trunk and lower branches, 

 would result most disastrously, and urged Mr. Webster to make personal 

 tests before recommending this dangerous application. 



Mr. Hopkins presented the following paper: 



SOME NOTES ON OBSERVATIONS IN WEST VIRGINIA ON FARM, 

 GARDEN, AND FRUIT INSECTS. 



By A. D. Hopkins, Morgantown, W. Va. 



The principal inquiries with reference to insect pests of the farm, 

 garden, and orchard within the last year have been about scale insects. 



An article that Avas sent to the State and county papers warning 

 farmers and fruit growers of the dangerous character of the San Jose 

 scale, and the possibility that it might be already established in their 

 orchards brought letters of inquiry and specimens in great numbers to 

 the experiment station, so that a pretty good opportunity was had to 

 ascertain the distribution of the San Jose scale as well as of other 

 scale insects. 



So far but five localities have been found in the State in which the 

 San Jose scale occurs, namely, Wellsburg, Brooke County; Martins- 

 burg, Berkeley County; Georgetown and Morgantown, Monongalia 

 County, and Charleston, Kanawha County. So far as 1 can learn, 

 the scale has not spread from the infested orchards, and in those I have 

 personally examined had not, so far as I could lind, spread from the 



