Record 234 of 382 - CRIS/ICAR 9/96 TI: LONGEVITY, HARDINESS, AND PRODUCTION PHYSIOLOGY OF FRUIT CROPS IN MIDDLE GEORGIA IN: YADAVA-U-L PO: AGRICULTURAL RESEARCH STATION. FORT VALLEY STATE COLLEGE LO: FORT VALLEY, GEORGIA 31030. FY: 1991 RN: S-00097 CL: PRIMARY CLASSIFICATION GENERAL CLASSIF. RPA ACTVTY CMMDTY SCNCE PRCNT PRGM JTC R104 A4400 C0100 F0212 20% P1.01 J1A R205 A4600 C1000 F1312 20% P3.13 J2B R109 A4840 C0400 F1312 20% P1.05 J1A R304 A5000 C1000 F1312 20% P3.13 J2A R109 A7500 C0100 F1312 20% P1.05 J1A PH: R104 (Alternative-Uses-of-Land); R205 (Disease-Control-Fruit,-Vegetables); R109 (Weather-Adaptation-and-Modification); R304 (Biological-Efficiency-Fruit,-Vegetables); A4400 (Evaluation-of-Alternative-Uses); A4600 (Protection-Against-Diseases,-Parasites); A4840 (Protection-Against-Climatic-Extremes); A5000 (Biological-Efficiency-of-Plants,-Animals); A7500 (Research-Equipment-and-Technology); C0100 (Soil-and-Land); C1000 (Deciduous-and-Small-Fruits-and-Nuts); C0400 (Air-and-Climate); F0212 (Biology-Environmental,-Systematic-Plant); F1312 (Physiology-Plant) GH: P1.01 (Soil-and-Land-Use); P3.13 (Fruit); P1.05 (Weather-Modification); J1A (Land,-Water,-Air); J2B (Plant-Protection); J2A (Plant-Production) SC: S1010 (Deciduous-Tree-Fruits,-General) 10%; S1030 (Berries-and-Cane-Fruits,-General) 20%; S1050 (Edible-Tree-Nuts,-General) 10% DE: PRUNUS-PERSICA; FRAGARIA; CARYA-ILLINOENSIS; PEACHES; SHORT-LIFE-(PEACHES); HARDINESS; PLANT-HORMONES; GAS-EXCHANGE; INTER-CROPPING; GERM-PLASM; ELISA-(ASSAY); PLANT-LONGEVITY; PLANT-PHYSIOLOGY; PECANS; STRAWBERRIES; PLANT-DORMANCY CT: Basic 60%; Applied 30%; Developmental 10% OB: (1) Determine rootstock effect on scion hardiness, tree survival, and orchard performance in relation to peach tree short life, (2) Evaluate peach tree short life in perspectives of phytohormones and gas exchange activities, (3) Investigate potential of strawberry cultivation in Georgia and its feasibility for intercropping in peach and pecan. AP: Rootstock effect on scion longevity and performance as related to peach tree short life development, will be investigated to understand rootstock physiology as influenced by scion hardiness, phytohormones, and gas exchange activities. To evaluate rootstock potential of exotic peach germplasm cold hardiness, water relations, and gas exchange activities of desirable genotypes will be further studied in comparison with Lovell standard rootstock. Development of peach tree short life syndrome and its association with gas exchanges and phytohormone influence will be undertaken in microplots. Selected strawberry cultivars will be evaluated for their cold hardiness, response to gas exchanges and protective structures, feasibility for intercropping in peach and pecan, and production in Georgia. Endogenous phytohormones and their relations with peach tree short life, gas exchanges, cold hardiness, and fruit production will be investigated using ELISA microtechnique. PR: 9101 TO 9112 Seven peach plantings at the Fort Valley State College Agricultual Research Station were involved in this project to investigate peach tree physiology in relation to phytohormone, rootstock (RS), and gas exchanges. Four peach trees in the regional RS planting, 6 in the phytohormone block, and 4 in jicroplots were killed by short life stresses. Rootstock showed trivial effect on tree growth, however tree survival was significantly influenced by rootstock, cultivar and planting soil. Due to unusually warm 1990-91 winter season, no serious canker or cold damages were observed. Observations from the phytohormone planting indicated that tree survival on Lowell RS was again higher this year than on Siberian C. Tree mortality in microplot trial was more frequent in short life than in non-short-life soil. No seedling trees of Wild peach or Lovell died during this season. Redhaven peach planting of 1990 on Lovell, Nemaguard, and Wild peach RS was properly maintained. Gas exchanges data on these trees were collected daily to determine cyclic pattern of these activities, however, observations were discontinued after few weeks due to weather interruptions. A planting of 144 trees consisting of 48 trees each of Lovell, Nemaguard, and Wild peach seedlings, was established in fumigated and non-fumigated short-life soil at the USDA Research Station, Byron, to study physiological impact of rootstock and nematode on scion performance related to short life stress. PB: 9101 TO 9112 YADAVA, U.L. 1991. Rootstock effect on short life performance of peach during 12 years. Acta Horticulturae (in press). PUSEY, P.L. and YADAVA, U.L. 1991. Influence of Prunus nectrotic ringspot virus on growth, productivity, and longevity of peach trees. Plant Disease 75:847-851. HARBER, R.M., NYCZEPIR, A.P., YADAVA, U.L. and SHARPE, R.R. 1991. Effect of rootstock, pruning, and soil fumigation on dormancy and cold hardiness of 'Redhaven' peach trees. HortScience 27:(accepted for production). YADAVA, U.L. 1991. Effect of planting soil, rootstock, and phytohormone sprayson peach tree survival in field microplots. HortScience 26(6):760 (abstract). PB: 9001 TO 9012 YADAVA, U.L. and RUSEY, P.L. 1990. Influence of Prunus Necrotic Ringspot Viruson gas exchange activities of 'Redhaven' peach trees growing on Lovell and Siberian C. rootstocks. Stone Fruit Tree Decline, 4th Workshop Proc. ARS-82:1-7.YADAVA, U.L. 1990. Rootstock effect on short life performance of peach during 12 years. Abstracts of contributed papers, 23rd Intl. Hort. Cong. Aug. 27-Sept. 1, 1990. Firenze, Italy, 2:4183. YADAVA, U.L. 1989. Single leaf gas exchange and chlorophyll content of 'Redhaven' peach as influenced by peach seedling rootstocks. Proceedings of Southeastern Professional Fruit Workers Conference 4:31-36. HARBER-STANG, R.M., NYCZEPIR, A.P., YADAVA, U.L. and SHARPE, R.R. 1991. Effectof rootstock, pruning, and soil fumigation on dormancy and cold hardiness of 'Redhaven' peach trees. HortScience 26: (accepted for publication). PUSEY, P.L. and YADAVA, U.L. 1990. Influence of Prunus Necrotic Ringspot Viruson growth, productivity, and short life-related performance of peach trees. Plant Disease: (submitted). PB: 8901 TO 8912 YADAVA, U.L. 1989. Gas Exchange Performance of Lovell and Wild Peach Seedlings. ASHS Programs and Abstracts 86:125. YADAVA, U.L. 1989. Effect of Rootstock and Growing Season on Gas Exchange Activities in Peach. Eighth Biennial Research Symposium 8:47. YADAVA, U.L. 1989. Gas Exchange and Chlorophyll Content of "Redhaven" Peach asInfluenced by Peach Seedling Rootstocks. Proceedings of Southeastern Professional Fruit Workers Conference 4:31-36 (Rept. #6). YADAVA, U.L. 1989. Comparison of Tree Performance and Physiological Charactersof Three Himalayan Peach Lines with Lovell. Journal of the American Society for Horticultural Science. (under review). YADAVA, U.L. and DOUD, S.L. 1989. Rootstock and Scion Influence Growth, Productivity, Survival, and Short-life-related Performance of Peach Trees. Journal of the American Society for Horticultural Science. 114(6):875-880. PB: 8801 TO 8812 YADAVA, U. L. (1988). Influence of rootstocks on the bark thickness and its relationship to the short life performance of peach trees. Fort Valley State College Agricultural Research Station Technical Bulletin No. 107, 12p. YADAVA, U. L., S. L. DOUD, D. J. WEAVER, and J. H. EDWARDS. (1988). Evaluation of laboratory and field methods to assess cold hardiness and survival of peach trees under natural freezing conditions. Fort Valley State College Agricultural. YADAVA, U. L. (1988). Peach tree short life in perspectives of gas exchange activities. Proceedings of 3rd Stonefruit Decline Workshop 3:54-64. YADAVA, U. L. (1988). Influence of freezing temperature and rootstock on cold hardiness of 'Redhaven' peach. HortScience. 23:171 (abstract ). YADAVA, U. L. and P. L. PUSEY. (1988). Influence of Prunus necrotic ringspot virus on gas exchange activities of 'redhaven peach trees growing on Lovell and Siberian C rootstocks. Proc. of 4th Stonefruit Decline Workshop 4:9-15. PB: 8701 TO 8712 YADAVA, U.L. 1987. Influence of abscisic acid (ABA) concentrations and cultivars on single leaf gas exchange activities of strawberry plants under greenhouse conditions. Proceedings of Plant Growth Regulator Society of America 14:360-368. YADAVA, U.L. and MCCRARY, D. 1987. Phytohormones influence single leaf gas exchange activities and the short-life related performance of peach trees in theorchard. Plant Proceedings of Plant Growth Regulator Society of America 14:395-403 JOHNSON, C., CARTER, J., SINGH, B. and YADAVA, U. 1987. Minority research apprenticeship students in horticulture as recruitment tool. HortScience 22(5):713 (abstract). YADAVA, U.L. and SINGH, B.P. 1987. Effect of soil water content on gas exchanges of peach seedlings in the greenhouse. Seventh Biennial Research Symposium 7:39 (abstract). YADAVA, U.L. and PUSEY, P.L. 1987. Influence of Prunus necrotic ringspot viruson vegetative growth, fruit production, and peach tree survival. HortScience 22(5):1136. OC: 001018 IC: 001566 SU: Region 2 (Southern). PS: TERMINATED UD: 8703 UP: 9210 PP: 9112 --------------------------------------------------------------------------------