82 



rNSECTS INFESTING THE APPLE TREE. 



Fig. 5]. 



and the ground, that they were easily destroyed by the use of 

 clubs. By these means the crop of twenty thousand trees was 

 secured from their ravages, although the orchard was not 

 entirely cleaned. 



GATHERIXG THE EGGS. 



In the month of January, 1882, men were employed to pick 

 the rings of eggs deposited on the branches, and succeeded in 

 collecting eggs which would have produced sixty millions of 

 caterj^illars. The cost of collecting the eggs was one dollar 

 and fifty cents per ounce. One ounce of the rings represented 

 one hundred and fifty thousand eggs. 



NATURAL REMEDIES. 



In 1881, many cocoons were found infested by the larva of 

 a Tachina fly (Fig. 51). 



Fig. 51.— Tachina Fly {Ta- 

 china don/phora) — colors, gray 

 and l)lack. 



In 1882, a small fly belonging 

 to the Braconinx (Fig. 51a, 

 Plate 1), a sub-family of the 

 IcltneiDiwnidx, made its appear- 

 ance and destroyed the cater- 

 I)illars hatched from the eggs 

 that escaped the egg gatherers. 

 At the present writing (May, 

 1883), Mr. DcLong cannot llnd any of tlie caterpillars of this 

 species in his orchard. Tlie full description of the work done 

 in this case is given to prove what can Ije done in destroying 

 insect pests. Mr. DeLong's apple crop produces a revenue of 

 thirty thousand dollars annually. Rather than to allow the 

 caterpillars to destroy his crop, he exterminated them at a 

 cost of about two thousand dollars. 



ReiDorts say that this species has been found this season in 

 one of the Bay counties. 



Remedies. — As described above. See Xos. 23 and 29. 



