Record 229 of 382 - CRIS/ICAR 9/96 TI: IMPROVEMENT OF STRAWBERRY CULTIVARS IN: PRICE-J-F PO: GULF COAST RES CNTR, BRADENTON. UNIVERSITY OF FLORIDA LO: BRADENTON, FLORIDA 34203. FY: 1992 CL: PRIMARY CLASSIFICATION GENERAL CLASSIF. RPA ACTVTY CMMDTY SCNCE PRCNT PRGM JTC R204 A4500 C1000 F0412 25% P3.13 J2B R205 A4600 C1000 F1112 25% P3.13 J2B R304 A5000 C1000 F0212 50% P3.13 J2A PH: R204 (Insect-Control-Fruit,-Vegetables); R205 (Disease-Control-Fruit,-Vegetables); R304 (Biological-Efficiency-Fruit,-Vegetables); A4500 (Protection-Against-Insects); A4600 (Protection-Against-Diseases,-Parasites); A5000 (Biological-Efficiency-of-Plants,-Animals); C1000 (Deciduous-and-Small-Fruits-and-Nuts); F0412 (Entomology-Plant); F1112 (Pathology-Plant); F0212 (Biology-Environmental,-Systematic-Plant) GH: P3.13 (Fruit); J2B (Plant-Protection); J2A (Plant-Production) SC: S1030 (Berries-and-Cane-Fruits,-General) 100% DE: STRAWBERRIES; PLANT-GENETICS; PLANT-IMPROVEMENT; CULTIVARS; PLANT-BREEDING; PLANT-DISEASE-RESISTANCE; VERTICILLIUM; COLLETOTRICHUM-FRAGARIAE; MITES; PLANT-INSECT-RESISTANCE; NEMATODES; CROP-QUALITY; CROP-YIELDS; SELECTION; SMALL-FRUIT; FRUIT; MYCOSPHAERELLA; TETRANYCHUS CT: Basic 0%; Applied 100%; Developmental 0% OB: To develop strawberry cultivars that have desirable horticultural characteristics and resistance to diseases and arthropod pests that are important in Florida. AP: Strawberry varieties and breeding stocks from various parts of the world which are known to possess horticultural characteristics or pest resistance desirable in Florida varieties will be obtained and tested to determine if these characteristics are exhibited under local growing conditions. Controlled crosses will be made between selected clones and selection from seedling populations will be performed. Selections will be based on yield, horticultural and fruit characteristics, fruit quality, and resistance to diseases, arthropods and nematodes. PR: 9201 TO 9212 Research involving twospotted spider mites (Tetranychus urticae) as pests of strawberries showed that: 1) Four weekly applications of cyhexatin reduced mites on fruiting strawberries, but not as well as did twice weekly applications. Mites remained low for 2 weeks; 2) Methomyl treatments reduced natural mite predators and increased mite densities; 3) Cyhexatin, clofentezine and hexythiazox miticides applied in various programs reduced mite densities; 4) Little differences exist among 20 strawberry cultivars or breeding lines in their capacity to support spider mite population increase; 5) Strawberry cultivars and breeding lines vary in their amount of deterioration due to spider mites feeding; 6) Strawberry cultivars and lines that produce larger amounts of foliage during the period of mite population development tended to survive spider mite infestations better than other plants; 7) No important advantages were detected between success of Phytoseiulus persimilis and P. macropilis as biological control agents; 8) When P. persimilis was applied at the density of one per plant, there was no advantage to applying one per plant again 1 and 2 weeks later; 9) P. persimilis predators were found 23 meters from release points 1 week after release; 10) Deutonymphal P. persimilis are dispersed by wind from densely colonized host plants. PB: 9201 TO 9212 KROPCZYNSKA, D., VAN DE VRIE, M. and PRICE, J.F. 1992. Reproduction of twospotted spider mite (Tetranychus urticae Koch) on different strawberry cultivars and lines as related to developmental stage of host plant. Proc. Second Symposium. POHRONEZNY, K.L, SCHUSTER, D.J., TYSON, R., GILREATH, P.R., MITCHEL, R.K., BROWN, R.L, WADDILL, V.H., MCSORLEY, R.T., PRICE, J.F., SUMMERHILL, W.R., DANKERS, W.A. and SPRENKEL, R.K. 1989. The impact of integrated pest management on select. PRICE, J.F. and KRING, J.B. 1991. Response of twospotted spider mite, Tetranychus urticae Koch, and fruit yield to new miticides and their use patterns in strawberries. J. Agric. Entomol. 8(2). Pages 83-91. SCHUSTER, D.J. and PRICE, J.F. 1992. Seedling feeding damage and preference of Scapteriscus spp. mole crickets associated with horticultural crops in west-central Florida. Fla. Entomol. 75(1). 115-9. PB: 9010 TO 9109 PRICE, J.F. and KRING, J. B. 1991. Response of twospotted spider mite, tetranychus urticae Koch, and fruit yield to new miticides and their use patterns in strawberries. J. Agric. Entomol. 8(2):83-91. PB: 8910 TO 9009 PRICE, J.F. and KRING, J.B. 1991. Response of twospotted spider mites Tetranychus urticae Koch (Acari:Tetranychidae) and fruit yield to new miticides and their use patterns in strawberries. J. Agric. Entomol. 8(2): in press. OC: 002145 IC: 001357 SU: Region 2 (Southern). PS: TERMINATED UD: 8705 UP: 9306 PP: 9212 --------------------------------------------------------------------------------