15 



Defoliation by gypsy moths alone will not kill a young apple 



tree. This defoliation, alone or combined with other stress factors, 



may result in predisposition to cankers and extensive branch die- 

 back of young apple trees. 



A********* 



INTEGRATED MANAGEMENT OF APPLE PESTS IN MASSACHUSETTS 



,1 



1981 RESULTS: INSECTS" 



. 3 3 



•m , L.J. Mancino , D. 



C. Sienkiewicz^ , R. Spitko4, and R.J. Prokopy 5 



W.M. Coli^, G.E. Morin^, L.J. Mancino"^, D. Gordon"^, T. Green^ 



Summary of Results - Intensive weekly scouting and grower advise- 

 ment in 19 orchard blocks that had been on an IPM program for one 

 or more years resulted in a savings in insecticide and miticide use 

 (dosage equivalents) of 21% and 60% respectively compared to the 

 checks. Fruit injury in such IPM blocks averaged 2.51 versus 2.0% 

 in the checks. In spite of this slightly higher injury level, IPM 

 blocks experienced a benefit of $40.18/A from IPM (exclusive of 

 scouting costs) . 



Number of Orchard Blocks Scouted - In 1981, each week (April 1 

 through October 1) field staff visited 41 IPM blocks (about 450 

 acres) in 22 commercial orchards throughout the major fruit-growing 

 regions in the state. Growers received a written scouting report 

 and were contacted either in person or via telephone by the IPM 

 Specialist and advised as to the need for spraying, materials to use 

 and timing. 



1 

 Special thanks to Mr. David Chandler, Meadowbrook Orchard, Inc. , Sterling 

 Junction, for allowing us to room 3 scouts at his housing for harvest 

 labor, throughout the summer. 



2 

 Pest Management Specialist 



3 

 Senior field scouts 



4 

 Field scouts 



5 

 Extension Entomologist 



6 

 Reduced spray programs on apples have been discussed in previous 

 issues of Fruit Notes : 41(1), 41(2), 41(3) and 43(3), and our 1978, 

 1979 and 1980 results were summarized in Fruit Notes 44(1), 44(6) 

 and 45(6) . 



