25 



Md. Chemical Thinning of Apples and Peaches . To (1) deter- 



mine response of heavy- fruiting major varieties of apples to 

 post-bloom chemical thinning sprays and margins of safety for 

 each variety; (2) study effects of time of application and 

 concentration of chemicals on thinning of apples and peaches 

 by means of post-bloom sprays; (3) develop satisfactory 

 method of chemical thinning of peaches in post-bloom period; 

 and (U) determine possibilities of reducing biennial bearing 

 of major apple varieties by chemical thinning. 

 Hort. L-7U-B 



Mass. Influence of Chemical Treatments on Flowering and Fruit- 



ing of Fruit Trees . Improve the size, color and quality of 

 fruit on heavily bearing fruit varieties by the use of chemical 

 thinning materials. Prevent wide fluctuations in the pro- 

 ductivity of fruit trees, especially apple varieties, which 

 have a tendency to bear heavily in one year and be practically 

 barren the following year, by the use of chemical thinning 

 techniques. Reduce the hazard of spring frost damage, which 

 may not only reduce or eliminate the current year's crop but 

 also may tend to make even generally annual bearing apple 

 varieties alternate for several years, thereafter, by delay- 

 ing the time of blossoming with some chemical or other treat- 

 ment. Improve the set on fruit varieties, which because of 

 climatic conditions or lack of pollenizers fail to set full 

 crops, by the use of hormone materials or improved methods of 

 pollen dissemination. 

 Hort. 95 



Mich. Agricultural Application of Growth Regulators and Their 



Physiological Basi s. To (1) develop physiological studies to 

 enhance understanding of mechanism of action of plant growth 

 regulators; (2) find new - materials and methods to apply to 

 crop production practices; and (3) find new uses for materials 

 already available. 



Hort., Agr. Chem. 55 



Mich. Control of Flowering and Fruiting in Vegetable Crops . 



Define environmental conditions which control flower formation 

 and development. Evaluate reproductive and vegetative responses 

 to chemical treatment. Promote earlier flowering and fruiting 

 through chemical treatment and controlled environment and 

 develop practical basis for these methods in commercial pro- 

 duction. Study biochemical and morphological aspects of 

 flowering. 



Hort. 89 



Mich. Translocation of Plant Growth Hormones as Modified by 



Alanap Treatment^ Investigate the possibility of controlling 

 plant growth by application of compounds which effect the 

 plants ability to translocate its own internal growth hormones. 

 Bot. and PI. Path. 827 



