Record 233 of 382 - CRIS/ICAR 9/96 
 TI:  HEAT STRESS OF SMALL FRUIT CROPS AND METHODS FOR STRESS ALLEVIATION 
 IN:  HELLMAN-E-W 
 PO:  HORTICULTURE. KANSAS STATE UNIV 
 LO:  MANHATTAN, KANSAS 66506. 
 FY:  1990 
 CL:   
                   PRIMARY CLASSIFICATION                  GENERAL CLASSIF. 
          RPA     ACTVTY   CMMDTY   SCNCE    PRCNT           PRGM     JTC 
          R304    A4900    C1000    F0212    100%            P3.13    J2A 
 PH:  R304 (Biological-Efficiency-Fruit,-Vegetables); 
      A4900 (Biology-of-Plants-and-Animals); 
      C1000 (Deciduous-and-Small-Fruits-and-Nuts); 
      F0212 (Biology-Environmental,-Systematic-Plant) 
 GH:  P3.13 (Fruit); 
      J2A (Plant-Production) 
 SC:  S1030 (Berries-and-Cane-Fruits,-General) 100% 
 DE:  STRAWBERRIES; RASPBERRIES; HEAT-STRESS; PLANT-WATER-RELATIONS;
 STRESS-TOLERANCE; ENVIRONMENTAL-STRESS; SPRINKLER-IRRIGATION;
 HIGH-TEMPERATURE; TRANSPIRATION; ANTI-TRANSPIRANTS; PLANT-TRANSPIRATION;
 EVAPORATIVE-COOLING; PLANT-GROWTH; GROWTH-INHIBITORS; SMALL-FRUIT 
 CT:  Basic 0%; Applied 100%; Developmental 0% 
 OB:  Determine critical heat stress temperatures for strawberry and evaluate
 the use of microsprinkler irrigation for evaporative cooling to relieve
 stress. Examine plant water relations of red raspberry under high
 temperatures, and evaluate the following cultural practices for potential to
 alleviate heat stress. Film-forming antitranspirants. Microsprinkler
 irrigation for evaporative cooling. 
 AP:  Strawberry plants will be subjected to heat stress to determine
 growth-limiting temperatures. Sprinkler irrigation will be used on field-grown
 strawberry and raspberry for evaporative cooling to relieve heat stress.
 Film-forming antitranspirants will be evaluated for improving plant water
 status of raspberry at high temperatures. 
 PR:  8707 TO 9006 
      Heat stress studies were conducted on strawberries grown in controlled
 environment chambers. Plants were subjected to a series of day/night
 temperature regimes (30/20, 35/25, 40/30C) to determine a critical heat stress
 temperature. Fruit weight was significantly reduced by the highest temperature
 regime. Soluble solids content of fruit was highest in berries grown under the
 lowest temperature regime. Runner growth of strawberry plants was also
 significantly reduced at the highest temperature regime tested, suggesting
 that the critical high temperature range for strawberry is between 35 and 40C.
 Field studies were conducted using sprinkler irrigation for evaporative
 cooling of strawberry plants. Overhead irrigation with microsprinklers reduced
 leaf temperature as much as 15C when relative humidity was 29% and wind speed
 approximately 5.3 meters/sec. Part of the cooling effect was due to the
 initial temperature of the irrigation water (16C), but sustained temperature
 reductions varied considerably ranging from 7 to 30 minutes. The amount of
 leaf temperature reduction and the duration varied considerably depending on
 climatic conditions. Evaporative cooling is favored by low relative humidity
 and windspeed adequate to provide circulation of air above the canopy. 
 PB:  8707 TO 9006 
      HELLMAN, E.W. and TARARA, J. 1987. Strawberry heat stress and evaporative
 cooling studies. IN: 1987 Fruit Research Report. Dept. Horticulture, Kansas
 State University, Manhattan. 
 PB:  8801 TO 8812 
      HELLMAN, E.W. and TRAVIS, J.D. 1988. Growth inhibition of strawberry at
 high temperatures. Advances in Strawberry Production 7:36-38. 
 PB:  8707 TO 8712 
      HELLMAN, E.W. and TRAVIS, J. 1987. Strawberry heat stress and evaporative
 cooling studies. In: 1987 Fruit Research Report. Department of Horticulture,
 Kansas State University. 
 OC:  001430 
 IC:  001928 
 SU:  Region 3 (North-Central). 
 PS:  TERMINATED 
 UD:  8704 
 UP:  9104 
 PP:  9006 
       
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