RECEKT RliiPORTS OX F'RUIT UISBASES MP TliBIh COIMTKOL (conxinued) 



Fermate S uperio r to Bordeaux on Grapes . Our present recommendations for 

 using iron carbamate instead of copper fungicides on grapes are based primarily 

 upon experiments conducted prior to 1948 by the N. Y, (Geneva) Station. A. J, 

 Braun of that Station reports further on the tests (Phytopath, Abstract 39 :1; 

 0,1949): "Concord vines sprayed tv/o seasons with Bordeaux Mixture, 4-4-100 

 and 8-8-100, and with Fermate (ferric dimethyl dithiocarbamate), 1-100 and 

 2-100, shovred accumulative effects of the treatments. The data were obtained 

 from control-pruned vines on which the number of buds was determined by the 

 weight of the previous season's shoot growth. Three applications of Bordeaux 

 liixture decreased vine growth as measured by length of shoot and petiole. 

 Similar applications of Fermate increased the vine growth. Berry size was 

 decreased by Bordeaux Mixture and increased by Fermate. Bordeaux Mixture 

 delayed ripening of the fruit. The vines sprayed with Fermate yielded more 

 than the unsprayed vines (yields adjusted for disease control) whereas those 

 sprayed with Bordeaux mixture yielded less. By taking advantage of the 

 increased vine growth resulting from the Fermate applications, greater increases 

 in yields may be expected. Early applications of Fermate decreased the 

 retarding effects of later applications of Bordeaux liixture." 



A Mist Sprayer and a Spray-Duster that Really VIork on Fruit Trees , Plant 

 pathologists at Cornell University (Ithaca, N. Y, j report the following 

 (Phytopath. Abstract 39_: 1: 19,1949) : "A sprayer for fruit trees, developed at 

 Cornell University, applies either wetted dusts or mist spray formulations. 

 The spray, or spray-dust, is carried by an air stream delivered from a 3-inch 

 slot, 8 feet long, set at an angle of 35° from the horizontal. The air 

 delivery of the machine now under test is approximately 20,000 cu. ft, per 

 min. at 105 m.p.h. Means are provided to adjust the angle of the air streams 

 to compensate for wind interference. There is a saving of water of approxi- 

 mately 7/8 of the amount used in conventional spraying. Control of apple 

 scab, cherry leaf-spot, and peach leaf curl has been equal or superior to that 

 obtained by conventional methods. Sulfur, lime sulfur, low soluble copper 

 compounds, ferric dimethyl dithiocarbamate, 2-heptadecyl glioxalidine, dinitro 

 ortho cresol, and insecticides have been applied. Experiments on the control 

 of fruit insects have been made in cooperation with entomologists. Both the 

 spray-dust and mist spray methods are effective, but the latter is more 

 economical of materials and is mechanically simpler. Disease control and  

 chemical deposit data indicate that adequate coverage is obtained with this 

 machine, which offers advantages over conventional sprayers in ease, speed, aiid 

 economy of operation," 



Cooling Peaches After Harvest Reduces Crovm Rot . The following report 

 by experimental station v/orkers in Indiana (Phytopath, Abstract 59; 1: 22, 1949) 

 appears to have more promise for post-harvest control of peach brown rot than 

 various pre-harvest spray and post-harvest dips employed by various experiment 

 station workers in 1948: "During the past three seasons broxvn rot has caused 

 serious losses to the Indiana commercial peach crop in storage. Common fungi- 

 cides applied in the orchard have not adequately prevented these storage 

 losses. Comparable samples of peaches were harvested in duplicate from 



