364 EXPERIMENT STATION BECORD. [Vol.35 



sagebrush (Artemisia tridentata), the principal host plant in the districts where 

 they are found, the injury being brought about througli the clearing up of 

 such lands and setting them to fruit trees, which then become the only available 

 food plant. 



The injury caused by the various species is said to have been considerable; 

 at times every bud is eaten out and the trees die or do not get a start after 

 they are planted. At other times only a few of the buds are destroyed and 

 the trees are able to maintain themselves. In some orchards it was found that 

 as many as half of the young trees were killed. Although this was an unusually 

 high percentage, it is not uncommon to find new plantings with losses of 20 

 per cent. 



The studies in 1911 were made at four localities and during 1912 at as many 

 as 15. A list is given of 14 weevils and 5 other beetles studied, together with 

 tables showing the different plants upon which the various species occur, the 

 remedies tried, and the results obtained. 



In regard to methods of control it is stated that as the weevils are wingless 

 and can not fly they can be prevented from destroying the buds by the use of 

 paper-cone tree protectors, here described, which are the most effective and 

 practical means of protecting the trees against the weevils. The paper cones 

 are also effective against climbing cutworms. With a little care and attention 

 to the adjustment of the cones they will give protection throughout the first 

 season, which is usually as long as necessary, as the weevils do not often injure 

 older trees. 



The weevils noted are Cercopexis artemisice, Cleonus lobigerinus, C. quadri- 

 lineatus, Geoderces melanothrix, Melamomphus luteus, M. nigrescens, Mimetes 

 setulosus, Mylacus saccatus, Panscopus cequalis, P. sulcirostris, Sitcma apache- 

 ana, Tosastes cinerascens, Tricolepsis sp., and Tychius lineellus. The other 

 beetles noted are Cotalpa granicollis, Eusattus muricatus, Glyptoscelis alternata, 

 Polyphylla decemlineata, and Syneta albida. 



From an economic standpoint T. cinerascens is the most important of the 

 weevils discussed in this paper, being the cause of thousands of dollars of losses 

 to orchardists throughout the whole of the arid region in the State. M. setulo- 

 sus, the most abundant weevil, is the second most injurious of the bud weevils 

 here discussed, having a wider distribution and a larger number of host plants 

 than any of the other species. E. muricatus has been observed to travel readily 

 up the trees and from bud to bud and can soon destroy all the buds on a tree. 

 On older trees it feeds on the blossoms 'as well as the buds and young leaves 

 and has been known to destroy the blossoms in some orchards to such an extent 

 as practically to ruin the crop. 



The strawberry weevil (Anthonomus signatus), T. J. Headlee (Neiv Jersey 

 Stas. Circ. 56 {191G), pp. 3-8, fig. i).— Measures hitherto recommended for the 

 control of the strawberry weevil having proved unsatisfactory, except in a 

 limited way, the author was led to conduct the insecticide experiments here 

 briefly reported, assisted by E. Douglass. While they were conducted in only 

 one field with but a single variety of strawberry (Heritage), the results indi- 

 cate what may be accomplished. 



It was found that combinations of arsenate of lead and sulphur maintained 

 as a dust coating throughout the two weeks when the strawberry is subjected 

 to the serious attack will afford almost perfect protection. While the half-and- 

 half mixture of lead and sulphur is the most efficient, a mixture composed 

 of one part of arsenate of lead to five parts of sulphur is effective and much 

 cheaper. Two applications were in this case sufficient, the first being applied 

 just as the beetles began to damage the buds and the second as soon there- 



