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"HOPJiOlffi" SPMYIHG Aim DUSTPIG FOR LESSEIIIIIG PREHAir/EST D ROP 



ITith tlie Mcintosh harvest season near at hand, the follov/ing comnents 

 and suggestions concerning "ilormone" sprays and dusts may be of interest: 



1. Sprays are probably somewhat nore reliable than dusts, 



2, Apply spray on Mcintosh as soon as sound apples begin to drop. A second 

 application 4 or 5 days later should increase effectiveness and will probably 



be Justified this year. 



3. ViTith dusts, tvio applications are reconmended, 



4, Spray, as nearly as possible, during the hottest part of the day. Ap- 

 plications are not very effective when the air" temperature is balov/ 70<-' F, 



5. Apply dusts vrhen air is quiet, preferably when trees aro wet v;ith dev; 

 and during hot weather, 



6, Use plenty of material. Thirty gallons of spray or three poimds of 

 dust are noni3 too much for mature Mcintosh trees. Thorough coverage is abso- 

 lutely essential, 



~ 7. Use' spray materials at standard strength (10 parts per million). This 

 strength is usually recommended by the manufacturer. For increased assurance 

 of effectiveness, use 1^ to double the standard concentration, especio.lly when 

 only one application is to be made, Hov/ever, the standard concentration is 

 likely to be sufficient if the spray is applied thoroughly and under favorable 

 weather conditions, particularly as regards temperature, 

 3. Do not use lower than standard strength spray, 



9, If Mcintosh trees shov/ severe symptoms of magnesium deficiency, drop- 

 control applications probably will not be effective, 



10. Remember that after about 10-12 days following an application, the 

 "sticking" effect may be dissipated, resulting in heavy dropping. This is 

 especially true with Mcintosh and harvesting must be planned accordingly, 



-— Lav/rence Southwick 



IClG?IES rjM DEFICIEIICY 



Symptoms of magnesium deficiency are nov; prevalent in apple orchards. 

 Dead, brown areas on leaves, often accompanied by yellowing, are tj'pical of 

 the trouble. Growers who feel certain that this trouble is present at all 

 in their orchards are asked to drop a card to the undersigned at Mass, State 

 College, Vfe are endeavoring to get an estimate of the prevalence of magnesiijm 

 deficiency in this state, 



La;;rence Southwick 



OUTBREAK OF SPOTTED TEITTIFORM LEAFMINER 



A general infestation of the Spotted Tentiform Leafminer has broken 

 out in eastern Massachusetts orchards, principally in Middlesex County. Al- 

 though all available reports on this insect state that "it has not been re- 

 corded as doing serious injury," the foliage in several orchards in this area 

 is already definitely damaged. Many leaves have 10 or more mines in them and 

 there is some yellowing and defoliation. The mines are about •§■ inch long and 

 ^ inch vdde, being pulled together in a fold or "tent" on the umderside of 

 the leaf. 



