24 



W . M . 



INTEGRATED MANAGEMENT OF APPLE PESTS IN MASSACHUSETTS, 

 1982 RESULTS: INSECTS 



Coli , R. Zahnleuter , D. Gordon , K. Leahy , J. Parella , 

 D. Roberts and R.J. Prokopy 



Summary of Results. 



In 1982, 36 IPM blocks received 11% fewer insect- 

 icide and 171 fewer miticide but 201 more aphicide 

 dosage equivalents than check blocks. Insect 

 injury to fruit at harvest in IPM blocks averaged 

 4.2-0, versus 3.5% in the checks. Growers completely 

 implementing IPM specialist recommendations (100% 

 cooperator blocks) realized a net benefit of $56.95 

 per acre from IPM. 



Number of orchard blocks scouted . 



In 1982, each week from April 12 to September 15, field 

 staff visited 36 IPM blocks (about 400 acres) in 20 commercial 

 orchards throughout the state. Growers received a written scouting 

 report and were contacted in person or by telephone by the IPM 

 specialist regarding the need for spraying, recommended materials, 

 rates and timing. 



Four commercial check blocks were monitored for presence of 

 aphids and mites and their predators 2 or 3 times during the season. 

 In addition, on-tree harvest surveys and comparisons of spray records 

 were performed in 7 commercial check orchards. 



Grower financial support . 



All participating IPM growers were charged $20 per scouted acre 

 for insect and mite scouting and advising. A minimum charge of $400 

 was instituted for growers v^ho wished to be on the program but who 

 signed up less than 20 acres. The charge for disease scouting, 

 weather monitoring stations and grower advising was $200 per orchard 

 in 1982. 



Pest Management Specialist 

 2 

 Senior Field Scout 



Field Scout 

 4 

 Extension Entomologist 



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, 44(6) , 45(6) and 47(1). 



