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CP.CILIRD SPIUYIIIG EI-^PIJRIIEIITS uOii UIIDER V^AY IIJ AIIIERST AIID VfALTIIAlvi 



u 



?if;^ardl<3ss of the nany changes v;hich have been i^orced upon us as a 

 r'ssult of the var effort, the battle against insect a?id disease pests con- 

 tinues uninterrupted. In fact, the study of new materials by the departnents 

 of Entx.ioloj^y, Botany, and Pomology has been intensified rather than di- 

 minished. 



In order that fruit growers throughout the state nay be informed of 

 the nature if the experiments which are being conducted for their benefit, 

 boti at State College and V.'altham Field Station, we are listing them in this 

 issuo of "Fruit Notes," 



1. A study of proposed substitutes to replace or supplement present 

 standard materials and practices giving special attention to roplaceraont 

 •of :.'iat3rials subject to curtailment because of the war emergency. These 

 include some of the non-arsenical compounds such as fixed nicotine sprays 

 and nicotine-pyrethrum compounds. (Araiierst) 



2. Tolerance tests on standard varieties of apples of early summer ap- 

 plicati^ns of DII sprays. The purpose of these tests is to determine the 

 reliitive safety to foliage of applications at different periods of the grow- 

 ing season and under different conditions of temperature and humidity such 

 as :?.ay be encountered in summer applications for the control of red mito. 

 (A.ri'irst and li^althan) 



o. Compatibility of Fermate, with and without lime, in standard spray 

 c "iLibinctions . (.•'iml'ierst) 



4. A study of materials vmich are being sold as bee repellents. The 

 purpose Tf these experiments are: 



a. To determine the effect of a particular repellent, in combina- 

 tion \.'ith a standard orchard spray, upon blossoms and leaves of fruit trees. 



b. To determine hc/r the repellent nay act and the duration of such 

 action. 



c. To determine the efficiency of each material as a repellent to 

 bees. (,^herst) 



5. The effect of measured gallonage as an indication of thorough cover- 

 age. This is a continuation of last year's experiment using Plum Curculio 

 as the test insect, 



6. A comparison of Cryolite with load arsenate and the compatibility of 

 Cryolite with Fermate. (Vfaltham) 



7. A study of the effect of a complete spray schedule using DU-lll and 

 Fermate vith lead arsenate added in the calyx and first cover sprays, (V/altham) 



8. A study of the comparison of Fermate v/ith various standard wettable 

 sulfurs. This experiment with test plots in various orchards throughout the 

 state is associated with the l.'ortheastern Spray Conference Cooperative Project. 



9. A study to determine the effect of the addition of lime to the standard 

 le^^d arsenate-wettable sulfur mixture upon the initial deposit and loss of 

 sulfur from weathering, (V/althan and Amherst) 



10. A study of the comparative scab control and rate of loss from weather- 

 in;, of coarse and fine grades of wettable sulfur, (Vfeltham) 



11. A study of the effect of different r ates of dilution of wettable sul- 

 fur and the fungicidal value of lead arsenate. (ITaltham and ;\mhorst) 



