-8- 



In the past, it didn't make any difference whether the worms were large or 

 small - TDE did a good job. In fact, we used to recommend that growers wait until 

 all the eggs had hatched and then apply TDE. However, under present conditions, 

 to make TDE do the best job against leaf roller, growers must get it on when the 

 first eggs start to hatch and then continue to maintain a deposit of TDE on the trees 

 during the egg hatching period. 



At the present time, there are no really good alternatives for TDE for leaf 

 roller control. However, Guthion, when used in an all - season program from petal fall 

 on, has given satisfactory control. 



The following is a summary for the control of red-banded leaf roller in 1960. 

 Include other materials as recommended in the Spray Chart for control of plum curculi 

 - other insects and mites. 



First Brood Control; 



Time 



Materials and Amount 



Petal Fall 

 First Cover 

 Emergency Use 

 (at second cover 

 on large worms) 



TDE- 50% 

 TDE- 50% 

 Phosdrin 



2 lbs. 

 2 lbs. 

 1 pt. 



Second Brood Control: 



Sixth Cover 



(July 25-August 1) 



Seventh Cover 

 (August 7-10) 



lead arsenate 2 lbs. 

 plus TDE-50% 2 lbs. 



On Mcintosh 



TDE-50% 2 lbs. 



plus 



malathion-25% 2 lbs. 



or phosdrin-257o 1/2 pt . 



On Varieties Maturing After 



Mcintosh 



lead arsenate 2 lbs. 



plus TDE-50% 2 lbs. 



Emergency Use 



(for late infestations) 



phosdrin-507o 



1 pt, 



Another important consideration in red-banded leaf roller control is to 

 know the situation in your orchard. Examine all blocks thoroughly before you 

 make your dec is ion I 



Thorough coverage, especially the undersides of leaves, is essential to 

 good control. 



WARNINGl Phosdrin is dangerouB . Follow safety precautions when using 

 this material. 



l.'.D. Tunis 



Extension Entomologist 



