-1.- 



NOTES ON A FEU APPLE IMSECTS 



Re d-banded Leafroller I.!oths of the first generation of Red-banded Leafroller 

 are now flying. In particularly advanced orchards we have found the young larvae 

 of the second brood already beginning to feed on leaves. Growers with Red-banded 

 Leafroller present in their orchards now would seen to be very unwise if they do 

 not use DDD in some form in either one or txvo applications against second broods. 



With the Red-banded Leafroller second brood already starting to appear, some 

 growers nay wish to include DDD in their regular fifth cover spray or a spray v/hich 

 will be put on about the 25th of July. Since there vrLll be also sone late Red- 

 banded Leafroller moths, egg laying and hatching, a second application of DDD 

 coming about the second vreek in August would seem to be necessaiy m these 

 orchards. 



The other alternative would be to put the regular materials on in the late 

 July spray followed by a special application of DDD in the second week of August. 

 In light to moderate infestations this single application coming about the second 

 week in August should give complete control of Red-banded Leafroller provided the 

 application is thorough. Including the DDD in the two sprays would of course give 

 additional assurance of control. 



The DDD nay be used as a substitute for the DDT in the late July sprays . I an 

 sure that lead arsenate should be included to provide the longer lasting residue 

 against apple maggot. Vfe should not apply lead arsenate in the August sprays except 

 perhaps a small quantity to the later varieties. Certainly not on llclntosh at that 

 time. 



Green Aphid Green aphids are building up to rather alarming numbers in 

 many bearing orchards. So long as they stay strictly on the teminals, the only 

 damage to fruit will be an occasional smutting due to the growth of sooty mold in 

 honey-dew which drops from the aphids on the higher terminals onto the fruit. If 

 they start migrating to the fruit clusters vfhich they are doing in many instances, 

 then some control measures should be taken. TEPP vdll provide the least expensive 

 and probably the most effective control. Mites vdll be hit with the same applica- 

 tion. Aranite has little or no effect against aphids. Yifhere it seems undesirable 

 to use TEPP, the older recomraendation for the use of nicotine sulfate could be 

 used. It would be more expensive and night not be so effective. 



Woolly Apple Aphid This insect is much more numerous this year and some 

 growers are expressing considerable concern over the presence of it on their 

 tenninals in addition to suckers and around pruning scars on the limbs and 

 branches. This insect over/dnters in active stages on the roots of trees and also 

 in mild winters as young nymphs tucked av/ay in the crevices of the scars formed 

 during the previous season. I feel fairly certain that the increase of this insect 

 is due to our series of mild vdnters. Where parasites have been depended upon to 

 provide most of the control for Woolly Aphid, then the use of DDT has been 

 responsible, at least in part, for its increase. Here in the Northeast the Wooly 

 Apple Aphid has been kept under control not alone by parasites, but by winter 

 killing. Thus my opinion that our mild winters of recent years may be largely 

 responsible for the present excessive numbers. The sane materials effective against 

 Green Aphid arc rr-ported to be effective against w'oolly Aphid, but it is necessary- 

 to increase the amount of wetting material and to spray very thoroughly so as to 

 wet the waxy coverings of the aphid colonies. 



