8 - 



Three new organic phosphate insectides, Gardoija*, Imidan*, and 

 phosalone (Zolone'^), are now registered for use on apples and will 

 be recommended in the 1970 Apple Spray Recommendations. A fourth 

 new material, Omite*, which is a sulfite acaracide, will also be in- 

 cluded in these recommendations. 



Gardona* : Gardona* is a non-systemic material which has been shown 

 to be effective in controlling a number of apple insect pests in- 

 cluding apple maggots, plum curculio, red-banded leaf roller, Euro- 

 pean apple sawfly, and fruit tree leaf roller. Sold as a 75% wet- 

 table powder, Gardona* is less toxic to warm-blooded animals than 

 many of the other phosphate materials; however, it should be handled 

 with care and all precautions listed on the label should be carefully 

 observed. 



Gardona* has been applied to several apple varieties, including 

 Mcintosh, Rome, Jonathan, Winesap, Stayman, York, Cortland, Northern 

 Spy, Gravenstein, R.I. Greening, Baldwin, Wealthy, and Grimes Golden, 

 without injury to the fruit. Under New York State conditions, how- 

 ever, Golden Delicious sprayed with Gardona* have shown a tendency 

 to russet, hence its use on this variety is ill-advised. 



I m i i J n * : This material, sold as a 50% wettable powder, is effective 

 against many of the same apple pests as Gardona*, and is also much 

 sfifer than many of the other organic phosphates; however, here also 

 1^ i . I ecommended that this material be used with caution. When 

 used in a seasonal program, Imidan* has been shown to suppress both 



tlie European red mite and two-spotted mite and green apple aphidb 



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Golden Delicious and other yellow varieties may exhibit some 

 russeting following the application of phosalone in some areas. 



Omi te* : A broad spectrum acaracide, Omite* has been shown to be 

 effective against the European red mite, the McDaniel mite. Pacific 

 spider mite, peach silver mite and the two-spotted mite. Since 

 Omite* is not a systemic material, complete coverage of both the 



*Trade name 



