AKKA.NSAS. 77 



Work on the apple-twig blight as originally outlined was about 

 concluded and the data were worked up for publication. Marked 

 differences in the susceptibility of varieties were noted, and the 

 influence of proper soil and fertilizer treatment in the control of 

 the disease was observed. Work was begun on the determination of 

 factors of immunity in certain varieties. Studies were made of the 

 causal organism and of the chemical changes brought about in dis- 

 eased twigs. 



In connection with the study of losses in soil fertility in fruit 

 growing a large amount of analytical data was accumulated during 

 the year. Work on the toxic substances in cottonseed meal was pur- 

 sued^ and studies on the woolly aphis and the apple-tree borer were 

 continued. Progress was also made in cotton-breeding work and 

 the study of the transmissible characters in cotton. 



The work conducted with the Hatch and other funds of the station 

 was extensive and varied, and part was taken in it by all the different 

 departments. The department of entomology studied methods for 

 ,the control of the San Jose scale, codling moth, plum curculio on 

 apples, black aphis of the peach, cotton-boll weevil, and other in- 

 sects. A new borer was found and its life history is being worked 

 out. The results of spraying work were reported upon m Bulletin 

 107 of the station. 



The plant pathologist investigated the bacterial flora of apples, 

 plums, and other fruits in relation to disease production, and entered 

 upon work on rice blight. 



The chemist cooperated with other departments, doing a great 

 deal of analytical work in connection with a number of projects and 

 including numerous analyses of feeds and soils. 



In agronomy special attention was given to 9otton and com, the 

 experiments conducted including tests of varieties, dates and meth- 

 ods of planting, cultivation, the use of fertilizers, and similar cul- 

 tural problems. Similar work was carried on with wheat, oats, bar- 

 ley, rye, forage plants, including grasses, clovers, alfalfa, soy beans, 

 cowpeas, and other crops. Work was also carried on with sorghum, 

 Kafir corn, beggarweed, velvet beans, and other similar plants to 

 determine their adaptability to Arkansas conditions. 



The department of horticulture brought together a lot of data on 

 various fruits and vegetables, carried on experiments with aspara- 

 gus, rhubarb, potatoes, tomatoes, strawberries, and orchard cover 

 crops, and tested in cooperation with this department the value of 

 Hungarian apple stocks. Experiments were also conducted in 

 orchard heating for the prevention of frost and work was begun 

 .with walnuts and pecans. In addition a large amount of material 

 secured from this department was given trial. 



