6. Amitrole - Amicrole has label approval for the control of annual grasses 

 and broadleaf weeds In non-bearing apple orchards. This should be applied at a 

 rate of 4 pounds (50 per cent product weedazol or amino triazole) in 100 gallons 

 of water. Apply Amitrole when weeds are growing vigorously. When weeds are not 

 controlled by a first application, treat again when regrowth is 6 to 10 inches 

 tall. 



7. Amitrole T - A liquid formulation composed of amitrole and ammonium 

 thiocyanate. Apply at the rate of 1 gallon in 100 gallons of water. It is most 

 effective when the annual grasses and weeds are growing vigorously. When these 

 are not controlled by the first application, treat again when regrowth is 6 to 10 

 inches tall. 



Non-Bearing Pear Orchards 



Oalapon, Dluron, Dalapon plus Diuron, and Amitrole may be used in non-bearing 

 pear orchards. The recommendations for the use of these materials are the same as 

 those given for non-bearing apple orchards. 



Weed Control in Peach Orchards 



Dalapon has label for use under bearing peach trees. However, it should be 

 used with care because peach trees are easily injured with this material. 



Poison Ivy Control 



Bearing Apple Orchards 



The United States Department of Agriculture accepted a label claim on October 

 12, 1959 for use of Amitrol^. (50 per cent product weedazol or amino triazole) to 

 control poison ivy in apple and pear orchards. The label claim reads as follows: 



Special Uses for Amino Triazole (507. Formulation) 



Apple and pear orchards 



poison ivy 

 Before fruit forms and 



after harvest 

 Do not graze in treated 



areas 



Amount per Acre 



4 lbs. in 

 100 gals. 



When to Apply 



When ivy is in full leaf, 

 spray ivy on the orchard 

 floor and around the base 

 of each tree. Use a 

 coarse spray to avoid 

 drift, do not allow spray 

 to contact stems, foliage 

 or trunks of fruit trees. 



Apply spray before fruit 

 forms or after harvest. 



While this label claim permits the vse of Amitrole in bearing orchards, it 

 has never been included on the label because of the feeling that promotion of the 

 product for application in bearin3 orchards before fruit forms might lead to mis- 

 use by growers and possible contamination of fruit at harvest. There was also 



