GENUINE SNOUT-BEETLES. 203 



as is the case witli the phim-goiiger, which always docs so. The 

 work of tlie larva is also shown. .Though we can not poison the 

 larvae which are hidden inside the fruit, a second spraying about 

 this time will do some good, as the females continue to deposit 

 their eggs for a long time and require some food. As such 

 spraying will also kill many other injurious insects of the plum- 

 tree, it should not be neglected. 



By midsummer the larva has reached its full size, and now 

 leaves to pupate; it does so in the earth beneath the tree, and the 

 pupa soon changes to an adult insect. As soon as able to nl'ove 

 the freshly issued beetles search for hibernating quarters, and are 

 not again seen in the orchard until the next spring. 



As will be seen from the above account of the habits of this 

 insect, it is not readily combattcd by arsenical poisons, though 

 two applications of them will do considerable good. Those who 

 will apply either Paris-green or London-purple for this purpose 

 .should recollect that the foliage of the plum is very easily injured 

 by all arsenical poisons, and that it is absolutely necessary to add 

 at least equal parts of quick-lime which will neutralize all soluble 

 arsenic and thus prevent injury. 



The old remedy of jarring the trees every day or two over 

 some sheets is after all the most successful one; in doing so dur- 

 ing the day, when these beetles are not active, they drop very 

 readily, and can be easily gathered and destroyed. The trees 

 should be jarred, not simply shaken. It seems that by jarring we 





Fig. 214.. — Machine to catch plum curculios. After Lintner. 



