312 BOARD OF AGRICULTURE. 



It is hoped, however, that by further experiments with 

 the same remedies and other substances something may be 

 found that will save this crop, either by being offensive to 

 or by the destruction of the insects. In the meantime the 

 certain but laborious method of jarring the trees and destroy- 

 ing the insects and the fruit containing their larvaj, or 

 that of planting the trees in poultry yards, must be resorted 

 to. 



The Potato Beetle. 



The effect of the pyrethrum powder on the larvae of this 

 beetle was to paralyze for a time, but not to kill them. 



The Rose Bug. 



This is another insect that our remedies, in a measure, 

 failed to destroy or to prevent wholly from destroying the 

 grape crop and rose blossoms. Pyrethrum has the effect of 

 paralyzing them for a time, and by repeated applications, 

 several times each day, may prove effectual. 



Kerosene and lime, dry, seemed offensive to them, but 

 they returned in a short time. Further experiments are 

 required to fully determine its value. 



In the use of carbolic acid, kerosene, and sulphur, they 

 were slacked with caustic lime and applied in form of powder 

 or in liquids. 



The liquids used for the distribution of insecticides were 

 water and buttermilk ; the latter causing the substances to 

 adhere to the foliage for a long time ; in some cases three 

 weeks or more. 



An examination was made to determine the cause of the 

 dropping of the apple crop, and it was found, in eight hun- 

 dred specimens examined when from one-half of an inch 

 to one inch in diameter, that all but three of this number 

 were punctured, and contained one or more eggs or larvae 

 of the plum weevil, and only a very few contained the larvae 

 of the codling moth, which is so destructive later in the 

 season. 



VII. Germination of Weed Seeds. 



Material for these experiments was collected during the 

 summer and autumn, and arrangements are already made for 



