26 



Minn. Physiological Studies of Fruit Crops as Related to Growth 



and Development" To (1 ) study fruit plants to learn their 

 ability to resist low temperatures; the relationship of plant 

 structure and physiological behavior to cold resistance; and 

 effects of environmental or cultural factors upon survival; 

 (2) screen new growth regulating chemicals for use in certain 

 applicable phases of three and small-fruit production; test 

 new or additional uses for these materials in fruit plantings; 

 and to undertake basic physiological studies to learn mode of 

 physiological action of the chemicals; (3) study response of 

 fruit plants to photoperiod under controlled length of day con- 

 ditions; and (ii) make survey to learn general nutrient level of 

 fruit plants in major producing areas of the state, and make 

 mineral analyses of plant tissues to be correlated with appro- 

 priate plant responses. 

 Hort. 212U 



Miss. The Effects of Growth-Regulators and Environment on Fruit 



Set and Quality of Tomatoes Grown in Plastic Greenhouses and 

 Under High Temperature in the Field . (1) Test methods of ven- 

 tilating and heating plastic greenhouses for proper control of 

 temperature, light, and humidity. (2) Learn effect of growth- 

 regulators on set of tomatoes grown in plastic greenhouses and 

 in field. (3) Study factors associated with drop of tomatoes. 

 Hort. HK-26 



Mo. Physiological Mechanisms of Reproduction of Horticultural 



Plants" ! To (1) make intensive investigations and evaluation of 

 effects of major antiauxins and one or two best known auxins on 

 flower bud initiation and development of tomatoes, beans, peas, 

 and possibly other horticultural plants, and secure desirable 

 set and yield of fruit after flower bud initiation and develop- 

 ment has been achieved; and (2) determine effect of various 

 synthetic plant growth regulators on fruit set, size and quality. 

 Hort. 129 



Mo. Hormone Sprays for Fruit Thinning and Control of Preharvest 



Drop . To (1) compare NA-Am and IPC at various concentrations 

 with NA for thinning Jonathan and Golden Delicious apples in 2 

 or 3 commercial orchards; and (2) compare 2,U,5-TP at various 

 concentrations with NA for preharvest crop control of Wealthy, 

 Jonathan and Winesap varieties in 2 or 3 commercial orchards. 

 Hort. 195 



N. J. Studies of the Photoperiodic Control of Flower-Bud Forma- 



tion in Strawberries , (l) Learn time and range of lower-bud 

 initiation in several strawberry varieties and if they are Short 

 Day, Long Day, or indeterminate plants. (2) Study inheritance 

 of the flower-bud initiation response in progeny of Sparkle x 

 Gem, (3) Study effect of far-red irradiation on flower-bud 

 initiation in strawberries. 

 Hort. 711 



