-8- 



4. Dornant DN sprays give excellent control of aphis egt^s, but only moderate 

 control of red mite eggs and scale. 



5, Liquid DN spray (Elgetol) is SDNOC (Sodium dinitro ortho cresylate). Powdered 

 DN dormant spray is either DNOC (dinitro ortho cresol) or DNOCIiP (dinitro 

 ortho cyclo phenol), DNOC is usually preferred to DNOCIIP. 



5. DN dormant sprays should be applied before the green tip stage of the buds. 

 Varieties of apples which break their buds quickly, such as Gravenstein, Yel- 

 low Transparent, and Duchess should be sprayed first. 



7, V'/here dormant DN and oil are combined, the amount of oil and dormant DN is 

 generally reduced to decrease possible injury to buds. Before mixing, read 

 the manufacturer's directions carefully. 



3. Mcintosh and Cortland are very susceptible to lateral bud injury by DN-oil 

 spray and it cannot be used safely on these varieties. 



). On Mcintosh which is seldom attacked by rosy aphis, a 3 or 4jo diluted oil spray 

 to control scale and red mite is the most practical dormant treatment. 



LO. On Cortland, which is very susceptible to rosy aphis, a DN dormant spray with- 

 out oil to control aphis, followed by a DN summer spray or dust to control red 

 mite, if necessary, is suggested. If both scale and aphis are serious on 

 Cortland, the risk of injury from DN-oil spray, must be taken. 



LI. DN 111 spray and DN D-4 dust are dinitro products for summer use and should 

 not be confused with Elgetol or DN powders for dormant sprays. 



L2. Bud moth, fruit tree leaf roller, apple red bug, and other scale insects are 



also controlled by dormant sprays. 



•^ — YL D. Ymitcomb 



RABBIT INJURY IN FRUIT TREES 



Many of us are more concerned than usual about the injury to our or- 

 chards from rabbits this winter. The combination of a deep covering of snow 

 and an unusually large population of "Cotton-Tail" rabbits has set the stage 

 in many orchards for serious rabbit injury. 



A brief review of my experiences in controlling rabbits in my own or- 

 chards may be helpful to some readers of "Fruit Notes." About five years ago, 

 we set an orchard of about a thousand apple trees, mostly one year whips. 

 This orchard is divided by stone walls into several blocks and has brushy 

 pasture land and woods near it. These are ideal conditions for harboring 

 rabbits. On the second day after planting, we knew we had a problem on our 

 hands v/hen we found quite a few of our one-year whips cut off about a foot 

 above the ground. The injury was greatest near the outside of the orchards 

 and new evidence of rabbit snipping was found for several weeks, although 

 it was worst just after planting time. 



That summer we made plans to protect the young trees as it was a sure 

 bet there would be a lot of injury the following winter if nothing was done. 

 Several repellents, to be applied either as a paint or a spray, were available. 

 IVe chose a repellent which is made by dissolving 7 pounds of rosin in 1 gallon 

 of industrial alcohol, and applied it with a small paint brush. This combin- 

 ation of materials proved to be ,safe for the trees and was used several years 



