Table 1. Effect of Dimilin 25W on pear psylla. Bloom occurred about May 7 in 1987, May 15 in 1988 

 and May 14 in 1989. 



Year Orchard 



Treatment 



Rate of 



formulated 



material/acre 



Percent of terminals infested 



Treatment 

 dates 



June 11 



July 13 



1987 A 



B 



1988 



1989 



B 



B 



Dimilin 

 Oil 



Untreated 



Dimilin 

 Oil 



Untreated 



Dimilin 

 Oil 



Untreated 



Dimilin 

 Oil 



Untreated 



Dimilin 

 Oil 



Untreated 



Dimilin 

 Oil 



Untreated 



Dimilin 

 Oil 



Untreated 



Dimilin 

 Oil 



Untreated 



Dimilin 

 Oil 



Untreated 



16 oz 

 4gal 



16 oz 

 4gal 



16 oz 

 4 gal 



8oz 

 3 gal 



8oz 

 3gal 



12 oz 

 3 gal 



12 oz 

 4gal 



12 oz 

 6 gal 

 4gal 



12 oz 

 8gal 



5/15, 5/22 

 4/20 



6/19, 6/29 

 4/16 



6/19, 6/29 

 4/24 



4/14, 5/5 

 4/21 



4/14, 5/5 

 4/21 



4/21, 5/23, 6/3 

 4/21 



4/26, 5/4, 5/23 

 4/26, 5/4, 5/23 



4/14, 4/26, 5/25 

 4/14 

 4/26 



4/26, 5/10 

 4/26, 5/10 



100 

 100 



June 16 



53 

 76 



3 

 15 



5 

 24 



97 

 99 



June 12 





 31 



14 

 92 



57 

 75 



11 

 34 



July 15 



4 

 12 



July 12 



26 

 71 



63 



87 



16 



Fruit Notes, Spring, 1990 



