residues may be decreased or eliminated through 

 detoxification. Envision also, after completion of 

 spraying, a tablet containing bacteria that one 

 drops into the spray tank and a few hours later, 

 the equipment is free from any pesticide. These 

 are exciting possibilities. 



Acknowledgments 



We thank George MacCoUom of the Univer- 

 sity of Vermont for supplying apple maggot flies 

 during the early stages of this work (which took 

 place at the University of Vermont), Evan 

 Thackaberry (also of the University of Vermont) 

 for his assistance with visualization of pesticide 

 degradation products, and Sylvia Cooley for 

 technical assistance with plant allelocom pound- 

 fly mortality studies. This work was supported 



in part by the National Agricultural Pesticide 

 Impact Assessment Program Grant #92-34050- 

 7268 and USDA National Research Initiative 

 Competitive Grant #893715. 



Selected References 



Brattsen, L.B. and C.F. Wilkinson. 1977. Herbi- 

 vore-plant interactions: Mixed-function oxidase 

 and secondary plant substances. Science June 

 17: 1349-1352. 



Robertson, J.L., K.F. Armstrong, D.M. Suck- 

 Ung, and H.K. Preisler. 1990. Effects of host 

 plants on toxicity of azinphosmethyl to suscep- 

 tible and resistant light brown apple moth (Lepi- 

 doptera: Tortricidae).J. Econ. Entomol. 83: 2124- 

 2129. 



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A New Book on Tree Fruit Nutrition 



In February, 1992, a shortcourse on the 

 Management of Tree Fruit Nutrition was held in 

 Wenatchee, Washington. The proceedings from 

 that conference have been pubhshed by Good 

 Fruit Grower and is available for purchase. 



The book consists of 22 generally easy-to- 

 read chapters and totals over 200 pages. It 

 begins with three general chapters on fruit tree 

 growth and development, root development and 

 physiology, and soil characteristics. This base is 

 followed by 12 chapters on minerals and ap- 

 proaches to meeting their needs in trees and 

 finiit. There are also three chapters on diagnos- 



ing nutritional needs in orchards, and a chapter 

 on fertilizer effects on water quahty. Finally, 

 the book concludes with three chapters on 

 fertigation. Eighteen different authors contrib- 

 uted to the shortcourse and the proceedings. 



This is an outstanding reference for frmt 

 growers, and will certainly become a standard 

 reference on nutritional problems in orchards. 

 Copies can be obtained from the Good Fruit 

 Grower, P.O. Box 9219, Yakima, WA 98909. 

 Cost is $15.00 plus $3.50 for shipping. We 

 strongly urge growers to obtain a copy £md to 

 refer to it often. 



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Fruh Notes, Summer, 1994 



