20. 



Average value of fruit loss per acre was $16.42 lower in IPM 

 blocks as well, resulting in an average net benefit per acre of 

 $93.37 from IPM scouting and grower advisement. 



It should be noted that savings in spray materials and appli- 

 cation costs seen in 1978, 1979 and 1980, are only the most immed- 

 iate benefits of IPM. IPM has essential long-term benefits as 

 well in reducing selection pressure for pesticide resistance and 

 thus greatly delaying development of resistance, and prolonging 

 tlie period of usefullness of currently available spray materials. 



FRUIT NOTES INDEX FOR 1980 



(This index of major articles has been prepared for those who keep 

 a file of Fruit Notes. The number in parenthesis indicates the 

 pages on which the item appears.) 



January/ Feb urary 



Further Trials with Naphthalene Acetic Acid (NAAJ for Tree 



Training. (1-2) 

 Winter Injury to Fruit Trees in 1978-79.(2-6) 

 Winter Injury in New Hampshire - A Grower Survey (7-8) 

 Progress Report: Height Containment on Spartan and Idared Trees (8-14) 

 Alternate vs. Every Middle Spraying for Apple Pests in 1979(15-18) 



March/April 



Airblast Sprayers for Orchard Spraying (1- 6) 



Spotted Tentiform Leafminers : Biology, Monitoring, and Control (7 - 12) 



More About Nematodes and Fruit Trees (13-14) 



May/June 



The Way You Fertilize Your Fruit Trees Can Affect the Quality of 

 the Fruit You Harvest (1-4) 



Suggestions for Use of Calcium Sprays in 1980(4-5) 



Suppressing Weed Growth Under Fruit Trees (5-6) 



Pomological Paragraph- Pruning at Planting (6-7) 



Influence of Pruning Peach Trees Late in the Spring(7-8) 



The Use of Promalin to Elongate Delicious Apples: Research Obser- 

 vations and Suggestions for Use in 1980 (8-12) 



Soil Management of Peach Trees (12-15) 



Sampling Methods and Provisional Economic Threshold Levels for 

 Major Apple Insect and Mite Pests in Massachusetts (15-18) 



Managing Mummy-Berry Disease of Blueberries in Massachusetts (19- 21) 



July/August 



Progress Report: Scion/Rootstock and Interstem Effects on Apple 



Tree Growth and Fruiting (1-2) 

 Soil, Tree, and Fruit Response to Lime and Type of Nitrogenous 



Fertilizer Applied at Two Timings Under Sturdeepsur Delicious 



Trees (3-7) 

 How Ethephon is Being Used to Advance the Maturity of Apples in 



Massachusetts (7-12) 

 Excessive Apple Bud Abscission in 1980: Was It Caused by Tarnished 



Plant Bug Feeding or Cold Temperatures? (13-14) 



