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FUNDAMENTALS OF AGRICULTURE. 



This insect is very prolific, and when once established 

 increases rapidly, soon incrusting the limbs and 

 branches giving them a gray appearance as if dusted 

 with ashes. The scale insects feed by sucking out the 

 sap from the inner bark, and if unchecked quickly de- 

 stroy the infested plants. This pest is readily con- 

 trolled by a single thorough spraying each year during 

 the dormant season with lime-sulphur wash, made by 

 boiling together for an hour, 20 pounds of lime, 15 

 pounds of sulphur, in about 15 gallons of water, to 

 be finally diluted to make 50 gallons of the wash. 

 Other sprays may be used as 20 per cent, kerosene 

 emulsion, strong whale oil soap solution, etc. 



Peach Borer. East of the Rocky Mountains the 

 peach borer usually occurs wherever peaches are 

 grown. The larvae feed under the bark at the crown 

 of the tree or on the roots. Young trees are greatly 

 injured and often killed by girdling, and the vitality of 



PEACH BORER. 



a, Adult female; 6, adult male; c, full grown larva; d, female pupa; 

 e, male pupa; /, pupa skin partially extended from cocoon. 



the older ones considerably impaired. Trees should 

 be gone over in the spring and fall, and the borers re- 

 moved with a knife, or killed in their burrows with a 

 stiff wire. 



Plum Curculio. The plum curculio punctures in 

 the spring peaches, plums, cherries and apples, caus- 

 ing them to fall or become knotty and misshapen as 

 they grow. The egg is deposited by the parent beetle 



