-9- 



or nothing to the average grower. He has no way of knowing the 

 amount of residue on his fruit without submitting a sample for 

 analysis. This season, for the first time, the Experiment Station 

 at the State College in Amherst, will bo equipped to m.ake analyses 

 of lead and of arsenate for individual growers at cost. Any 

 grower desiring to kno\; definitely the condition of his fruit as 

 regards the federal tolerance may avail himself of this nev/ ser- 

 vice. The method of taking the sample is, of course, important. 

 Details regarding the amount of fruit required and method of 

 sampling will be announced later. In connection with spray 

 residue, this one fact must bo kept in mind. There is a definite 

 relation between the amount of residue at harvest time and the 

 date of the last spray. The time of harvest must be considered 

 as v;e spray for late season posts. If heavy rainfall was certain 

 to occur this item would be less iinportant, but having no control 

 of the v/eathor, the grower must rely upon proper timing of his 

 sprays and upon the use of recommended matcria.ls. 



Apple Mi dge ^Ctt W ork i n Essex County 



In "the annual "report of the Mass. State College Experiment 

 Station, V/. D. Vi/hltcomb reports on the apple leaf curling midge as 

 follows: This pest was normally abundant in 1935 in the infested 

 area. (Essex County and a few miles co.stward). No definite in- 

 crease in the knovm infested area was discovered. In the orchard, 

 flies of the over-wintering generation were abundant from 

 blossoming time until June 4. Mature maggots began to leave the 

 curled leaves by June 18 and flies of the first generation were 

 abundant during the latter part of July. Evidence was secured 

 tha.t migration of mature maggots depends upon moisture. He 

 suggests the following schedule of treatment v/hich should greatly 

 reduce the abundance of midge and prevent its development into a 

 serious pest: Cultivation under trees before blossom- period. 

 Application of one pound of calcium cyanide or two pounds of 

 naphthalene flakes per tree just before the blossoming period. 

 Addition of nicotine to Calyx and first apple maggot sprays. 

 Application of bctanaphthol treated corrugated po.per bands to 

 trunks of infested trees about Jujie 15. It should be explo-ined 

 that the apple midge results in a very tight curling of the young 

 leaves on apple shoots. Thus far its dojnagc has not seriously in- 

 terfered with the apple crop ;in.d it is to be hoped that its mi- 

 gration may be checked and that the application of the above 

 schedule may not become nocossuVj in Massachusetts orchards. 



Obse rvat ions of This and That 



In our attempt" to control scab in Mass. orchards this 

 spring, there scem.s to be more than the usual amount of lime sul- 

 fur injury to leaves. Scab control seems to be a compromise 

 betv/een th^ highest possible protection against scab and the least 

 possible amount of injury to leaves. The young chestnut trees 

 planted by Thom.as Haley in Orange this spring are making excellent 

 growth. Incidentally, frost rings are in evidence on some of the 

 Wealthies and Oldenburg apples in this orchard. Aphids appear to 



