- 36 - 

 Disease Control 



Del. Botryosphaeria Rot of i^ple in Storage. To obtain infor- 



mation on (1) life history of the causal organisms, Botryo - 

 sphaeria rib is , on apples entering, during, and after cold 

 storage; (2) development of rot under cold storage euid post- 

 storage conditions; and, (3) control of rot by treatment of 

 apples before entering and when leaving cold storage. 

 Plant Path. l6-P 



Del. Apple Fruit Rots . To obtain more information on the 



life -histories of the causal organisms, and to develop effect- 

 ive, economically soiind control meeisures. 

 Plant Path. U3-P 



Maine Organic and Other Fungicides as Spray Materials for Apples . 

 To evaluate organic fungicides as to scab control and such 

 side effects as chlorophyll content, tree growth, yield rate, 

 fruit quality, compatibility, and residual effects in the soil. 

 Plant Path. 29 



Mo. The Use of Antibiotics and Antibacterial Substances in 



the Control of Horticxiltural Crop Diseases. A, Fire Blight 

 and Its Control ^ To (1) find effective and safe spray combin- 

 ations and formulations of antibiotics which will control fire 

 blight; and, (2) determine qiiantitatlve distribution between 

 blight susceptible and blight resistant varieties of an anti- 

 biotic substance naturally occuring in apple leaves. 

 Hort. 27-a 



N. Y. The Fire Blight Disease of Pome Fruits and Its Control . 



(Cornell) I. Influence of Soil and Cultural Conditions on Disease Devel- 

 opment . To determine (1) if soil texture and moisture relations 

 may influence disease development independent of influence on 

 growth of trees; (2) influence of different nutrient levels 

 and balance on development of disease in trees on soils different 

 in type and moisture, and determine effect of varying soil 

 nutrient balsmce on disease; (3) influence of different cul- 

 tural practices as to cultivation, sod culture, and cover crops 

 on disease development; and, (k) apply information to reduce 

 disease develoisnent in commercial orchards, 

 Pomol., Plant Path. 129-1 



