110 





good, otrajigcjly enou;_h, in the sarr.e orchard, the uijiiect yield of idlj t'at 

 loT/est scab counts on fruits, cjid tlie lovrest per cent of drops vicre obtained 

 from trees that received no nitro,^en either on the soil or in the spray, and 

 that were sprayed r/i-ch Ferrnate throughout the 6-year period. Fenr.ate contains 

 about lO^/i nitrogen. 



Continued Use of Fermate Boosts Yield of Mcinto sh Apples, L. H. raliiiiter 

 of the W, Y^ T^'enevaJ Station reported at the recent science meetings in 

 Pittsburgh (Phjiropath. 39_: 1: lo, 1949) that "The continuous use of Fennate ^70 

 cent ferric dimethyldithiocarbaaiate) on Mcintosh apple trees v:):ich received u 

 nitrogen fertilizer over a period of six years increased the jdeld of fniit 57 

 per cent over that of corresponding trees that v/ere sprayed v/ith v/ettablc sulfur. 

 .Annual soil applications of tiTO or more pounds of N per tree increased the yleln 

 of sulphur sprayed trees over that of the unfertilized Fennate plots during the 

 first tvm years of the tost but in the last three years the Fernate plots have 

 outyielded even the best nitrogen fertilized plots. In 1947 and 1948 the best 

 sulfur sprayed and nitrogen fertilized plots averaged 9 boxes of fruit per tree 

 per year compared v/ith 17 boxes of fruit per tree per year from the Fermate plot; , 

 Several factors appear responsible for this increased yield rdiere Fennate is usot. 

 ' as the fungicide in place of sulfur, Fennate contains some niti-ogen aiid in a 

 spray season a tree may receive as much as -v- pound of IJ. However, other factors 

 such as reduced scab and spray injury to the foliage may be just as important. 

 In 1948 most of the trees in the experiment had close to 100 per cent bloosu, but 

 blossoms and fruit coimts indicated more than 50 per cent increase in fruit set 

 on the Fernate sprayed trees." 



■2igSg. A" storage Rooms. U.S.D.A, Circular ITo. 765, Jan. 1948, contains a 

 detailed account of tests in vj-hich Ozone vms used in apple storages. Or one has 

 been used in humid meat, egg and apple storages for deodorizing the aimospjiere 

 aiid for preventing the grovrth of surface molds on meat, packages and walls. It 

 greatly reduces the population of air-borne fungi including those that cause 

 blue-mold and gray-mold rots of apples; and at standard concentrations (1.95 v.r.i'. 

 'ind times of exposure, it even slows up the rate of development of blue-mold 

 -iecay in apples, Hovrever, it does not kill the fungus in decay tissue nor does 

 it materially check the groivth of mold patches that are already established on 

 boxes, vmlls, posts, etc. Ozone, in fact, is a mild disinfectant, exerting it;; 

 bfest influence on the spores by preventing or reducing tlieir geraunatiO]! and the 

 formation of surface grovrth. 



fJsu of over concent rat ions, i.e., 3,25 p. p.m. of Ozone in apple storages fnr 

 '■^uai exposure periods caused injury to apples, also off-flavor. No such 

 'lo]eterjous effects resulted from concentrations of 1.95 p. p.m. 



^zone ip a 3tinulant_ f_or Certain Fungi . As indicated abov^. Ozone is to;.ic 

 .0 bhe sporea "of'Vome" fungi, " AccordTug to a report by M. C, Richards, Hew Ha-np- 

 "l.ire 3+;s,,t:on (Phyhopath. Abstr. 39: 1: 2^0, 1949) Ozone actually is a stimulant for 

 ofcr^.b.in fni-jg-j, , Under ordinary conditions t)io fungi in qiAestion produce spores 

 ^"^ry r.p!;,rJrjg].y but r/Len f-ixposed to Ozone, they sporulate abundsuitly, Iii this 

 o'c-.t'^rory an-j hlie fungi that cause early blight of tomatoes, the black Ical'-spoc 

 of cabijf.ire, Wid i,he b'Jfi.ck-rot storage disease of winter squash, 



— 0. C. Boyd 



NO JATOARY FRUIT IIGTES - This is the first issue 

 of FRUIT NOTES since December 30. Other matters, 

 seemingly more urgent, have occupied our attention 

 during ■Jt.muj.ry. 



