WHAT OTHERS SAV. 419 



purpose of feeding and preparing a place of deposit for its egg. The 

 punctures, unlike those of the plum curculio, are small, round and rim- 

 med with black. It is single brooded, and undergoes its transformations 

 within the apple, where the small wrinkled and humped larva works 

 around the core, after a time changing to a translucent white pupa. In 

 a short time the adult beetle emerges and cuts its way out of the fruit. 

 It can be kept in check by jarring the beetles from the tree, in sum- 

 mer, upon a sheet and burning them, and by gathering and destroying 

 the infested fruit. 



PLUM CURCULIO. 



In Bulletin No. 4, of the Ohio Agricultural Experiment Station, 

 Clarence M. Weed, entomologist, reports some elaborate experiments in 

 preventing curculio injury to cherries. We have only space for the fol- 

 lowing summary and conclusions: 



1st. These experiments were undertaken to learn what effect the 

 application of London purple and lime to cherries soon after the fruit 

 forms, would have in preventing the injuries of the plum curculio, or, in 

 other words, in lessening the number of wormy cherries. 



2nd. For the carrying on of the experiment a half-acre orchard 

 of bearing trees was set aside, and a part of it treated, while the rest was 

 left as a check. 



3d. London purple was applied in a water spray, mixed in the pro- 

 portion of one-half pound to fifty gallons water. 



4th. Lime was applied in a water spray, mixed in the proportion 

 of four quarts to fifty gallons, until the leaves were whitened. 



5th. The cherries were critically examined when nearly ripe, and 

 the exact number of specimens injured by the curculio recorded. In this 

 way 22,500 cherries were individually cut open and recorded. 



6th. From eight trees, sprayed thrice with London purple, 8,000 

 cherries were examined, of which 280, or three fifths per cent, were 

 wormy, while from seven companion trees not treated 7,500 were exam- 

 ined, of which 1,086 or 14.5 per cent were wormy. This represents a 

 saving of 1 1-14 or 75.8 per cent of the fruit liable to injury. 



7th. From two trees, sprayed four times with London purple, 2,000 

 cherries were examined, of which sixty-nine or 3.45 per cent were wormy. 



8th. Two quarts of cherries from each of these lots were chemically 

 examined at the time of ripening, by Prof. H. A. Weber, and showed no 

 trace of arsenic in any form. 



