. Better fruit. Fruit-culture. 1 age 6 BETTER FRUIT September most abundantly in the e;irly-niorning hours, so it is very easy for these in- sects to carry the blight germs upim their feet and nioiilli parts from the base of the trees to the blossoms, which are very susceptible at this season of the year. A few years ago several hundred trees were used in an experiment for the control of crown gall. In this ex- periment various chemicals were ap- plied to crown-gall infections on the roots of such trees. Among other com- pounds sulphur was used very gener- ously in this experiment and in check
. Better fruit. Fruit-culture. 1 age 6 BETTER FRUIT September most abundantly in the e;irly-niorning hours, so it is very easy for these in- sects to carry the blight germs upim their feet and nioiilli parts from the base of the trees to the blossoms, which are very susceptible at this season of the year. A few years ago several hundred trees were used in an experiment for the control of crown gall. In this ex- periment various chemicals were ap- plied to crown-gall infections on the roots of such trees. Among other com- pounds sulphur was used very gener- ously in this experiment and in check- ing up on the results of this experiment we noticed that wherever powdered sulphur was used, that we seldom found any insects around the base of the trees, while on the check trees and on many of the other trees in the ex- periment, click beetles and other in- sects were found (]iiitc generally. From this experiment with sulphur on crown gall we conceived the idea that sulphur around the base of the trees might act as an aid in controlling blight. When this fact was made known to some of our orchardists, two carloads of sul- phur were purchased by the growers and applied at the rate of 2 to 4 pounds around the base of each tree, usually about 2 or 3 inches below the surface of the soil. This sulphur has been around these trees for the past three years and apparently is quite a factor in controlling blight. Tanglefoot bands around the trunks of trees have also proved to be an aid in controlling blight by catching insects that crawl up and down the trunks. The use of sprays for the control of pear and apple blight has been discour- aged by the Department of Agriculture and Experiment Stations for many years, and investigators have not been experimenting to any extent with sprays for the control of blight. Our idea in experimenting with this spray for the control of blight was not that we would control or retard the de- velopment of blight after it had once gained access to the
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