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The strong trend to dichlone, captan and glyodin, and the promise demonstrated 

 by thirara and the new iron and manr;anese carbamates characterize the present era 

 of fungicides on orchard fruits. The most recent materials preserve the natural 

 function of the foliage and the satin finish of the fruit. Glyodin is in addition 

 an excellent spreader-sticker, thus being valuable in combination with other fungi- 

 cides. All of the nevif materials except Phygon may be used with superior type oils 

 at delayed dormant, Ife now have safe fungicides for all varieties and for inter- 

 planted apples and peaches, Thiram does not injure peach foliage, nor is it in- 

 jurious to Red Delicious foliage. Both of these circumstances have restricted the 

 use of captan, Thiram, like ferbam, controls the apple rust diseases. These 

 newer materials are compatible with phenyl mercury. The half and half mixtures in 

 general show advantage by better all-purpose fungicidal action and greater safety 

 to the foliage. Greater tolerance, better wetting, and better disease control 

 feature the new fungicides. 



The fruit disease work at V/altham has been publicized at growers' meetings in 

 annual reports of the Ilassachusetts Fruit Growers' Assn. and Ilass. Agr, Experiment 

 Station, scientific meetings and otherwise. The tests and observations have been 

 useful in contributing to improvements and revisions of the fruit spray schedules, 



Apple growers are familiar with the professional character of the 1956 apple 

 soray schedule. It comprises ih pages of pertinent information to guide the grower 

 to produce a clean crop of apples. The progress of change in a period of near ^0 

 years can be appreciated from a glance at the apple spray schedule of 1913. In 

 those days apples were packed in barrels and the spray schedules were prepared by 

 clerks in the State House in Boston, The tv/o important sprays came at dormant for 

 scales and at calyx for codlihg moth and leaf feeding insects. Scab was of minor 

 importance. The schedule was composed of six spray applications, but in many cases 

 only two were necessary. The materials used were lime sulfur or miscible oil at 

 dormant, and lime sulfur, Bordeaux and lead arsenate for the other spray applications 

 The array of pests today represents a vast change from the past and obviously makes 

 an alert research and extension program a necessity. The present activity of the 

 writer on fruit diseases involves two projects; 



Investigation of Fungicides that Promise Value in Apple Disease Control , 

 Presently we have been comparing Thiram, the iron and manganese Vancides, Glyodin, 

 Captan, and US 605 (thiram and dichlone combined). The materials were combined 

 rtth superior type oils at delayed dormant and with insecticides recognized in the 

 official spray schedule. 



Taxonomy, Infection Cycle and Fungicidal Control of Peach Canker caused try 

 the fungus Fusicoccum amygdali . The late Dr, 0. C, Boyd reported this disease in 

 peach orchards of southeastern Massachusetts in 19iiO and this was the first report 

 of the disease in Ilassachusetts, When the disease came to ray attention in 19Sh, 

 it was epidemic and destructive, and a subject worthy of immediate study, V/e 

 have investigated the organism causing peach canker, the infection cycle and in- 

 fection sites. We have organized spray schedules to fit vulnerable periods in 

 the life history of the pathogen. In the beginning of our work the disease v/as 

 a big question mark, and our knowledge of its control was zero. By fundamental 

 stiidies, life history and infection studies, and spraying tests, the various aspects 



