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work in laboratory and field before they can meet the requirements of a 

 standard fungicide. 



Fermate (Ferric dimethyl dithiocarbamate ) . This black, soot-like 

 powder has""b'een~sub jected to experimentation and field trials for several 

 years, and is now recognized as a standard fungicide for several fruit 

 diseases. J-fc is given full recognition in the 1946 apple spray chart. 

 Fermate may be used either as a spray or a dust. It is compatible with 

 all other common spray materials including summer oils, except lime and 

 copper. Although lime does not reduce its fungicidal value, it reacts 

 chemically with Fermate to form a more soluble compound that may injure 

 various crops/ Fermate is particularly compatible with sulfur, appearing 

 to be benefited by the sulfur as well as stepping up the fungicidal value 

 of the latter, but it should not be mixed v;ith copper, 



Fermate, either in dust or spray form, is a decided specific for 

 cedar rusts on apple and quince. It also acts as a safener for arsenical 

 injury when combined with lead arsenate. Fermate is as effective as or 

 better than wettable sulfurs for the control of scab and black rot of 

 apple and pear, also leaf and fruit spots of pear, and it is much safer 

 for those crops as regards fruit russet. It likewise is as effective as 

 standard copper sprays, with much less injury to foliage and fruits, on 

 apples for control of blotch, Nev; Hampshire fruit spot, and bitter rot. 

 Fermate is as effective as Bordeaux mixture or copper dusts for black 

 rot of grapes; the equal of sulfur, and with less injury, for cherry 

 brown rot and leaf spot. It is considerably superior to Bordeaux and 

 other copper sprays for the control of cranberry fruit rots. V/hile Fer- 

 mate is effective against peach scab and brown rot of stone fruits, it 

 is not considered safe for tender peach foliage. 



In 1946, Fermate will be available in three-pound packages as 

 v/ell as in 20-pound drums. The spray deposit is improved at least on 

 some crops by the addition of a moderate amount of spreader. Fermate 

 should be made into a slurry or water suspension before it is added to the 

 tank, preferably by pouring the mixture, v/ith the spreader, repeatedly from 

 one large pail or can into another. At the prevailing price of 60 to 70 

 cents per pound, Fermate may perhaps be employed most economically for 

 control of cedar rusts and as the standard fungicide on russet-susceptible 

 varieties such as Baldxvin, Delicious, etc, 



Puratized N5-E (Phenyl mercuri triethanol ammonium lactate). 

 This complex organic compound occurs in true solution, and has been used 

 extensively by the U.S. armed forces for mildevir-proof ing various kinds 

 of cloth and other fabrics. It is considered compatible with arsenicals, 

 nicotine sulfate, fish oil or linseed oil, but not with lime. There is 

 some question whether it is compatible with summer oils, also with hard 

 water, and with sulfur and when following sulfur sprays. It is considered 

 at least as effective as the best wettable sulfurs in preventing apple 

 scab and black rot; also the equal of limo-sulfur in burning out apple 

 scab leaf spots without causing any injury whatever to the foliage or fruit. 



The principal handicap for Puratized is the extremely small amount 

 of mercury it contains. As long as there exists no set tolerance for this 



