EXPERIMENT STATION WORK WITH INSECTICIDES. 2G7 



THE APPLE MAGGOT. 



The injury from the apple maggot, while not more serious than that 

 of the codling moth, has been found more difficult to prevent on. 

 account of the practical impossibility of applying direct methods for 

 the destruction of the pest. In Maine" elaborate exi)eriments were 

 carried out on various remedies in the control of this insect. As 

 a result of these experiments it is concluded that the adult flies may 

 quite easily be captured while resting on leaves or ap])les. The chief 

 reliance, however, should l)e })laced on the destruction of windfalls 

 as soon as jiossible after they droj). The maggots do not leave the 

 fruit until it falls to the ground. The windfalls may be collected 

 and fed to stock in the yard or pasture, or enough sheep and hogs may 

 be kept in the orchard to eat the apples as fast as they fall to the 

 ground. In order to prevent still further infestation of orchards 

 attention should be given to decayed apples and other refuse from 

 apples stored for home consumjjtion. 



In Rhode I'-^land ^ a thorough test was made of the effectiveness of 

 plowing the orchard in controlling the apple maggot. These experi- 

 ments were continued for a period of live years, and showed that cul- 

 tivation of orchards in the spring for the purpose of burning the 

 pupa? is practically valueless, at least in Rhode Island. There may 

 be some advantage derived from frequent cultivation in early summer, 

 and where practicable the ground may be sprayed with crude oil with 

 more or less beneficial results. The only practical method of pre- 

 venting the injury of apple maggots in commercial orchards, how- 

 ever, is found in pasturing the orchards so as to be sure that all wind- 

 fall apples are eaten. 



THE FRINGED-WING APPLE-BUD MOTH. 



The fringed-wing apple-bud moth {Tlolocera maltgemmdin) has 

 caused great injury, especially in Missouri,*^ by eating the leaf and 

 flower buds of apple trees. Experiments at the Missouri Station 

 showed that the best and only reliable method of combating this pest 

 consists in thorough spraying at frequent intervals before the blos- 

 soms ojxMi. For this purpose Paris green is recommended at the rate 

 of 1 pound in 150 gallons of ^vater to which 3 pounds of lime has 

 been added. The first application should be made after the biuls 

 have opened and the young leaves begin to appear. The second 

 application may be made aI)out five days later, and the third just 

 before the flowers open. 



"Maino Sta. Rpt. 1S«)0. pp. 100-230. 



6 Rhode IsImtkI Sta. Rpt. 1904. pp. 101-201. 



Missouri Sta. llul. 42. 



