Title page for ETD etd-11172012-040219

Type of Document Master's Thesis
Author Kerkhoff, Karen Leigh
URN etd-11172012-040219
Title Effects of defoliation on the cultivated strawberry :(Fragaria X ananassa Duch.)
Degree Master of Science
Department Horticulture
Advisory Committee
Advisor Name Title
Williams, Jerry Michael Committee Chair
Barden, John A. Committee Member
Seiler, John R. Committee Member
  • Defoliation
Date of Defense 1987-08-05
Availability restricted

Using 'Redchief' (Junebearer) and 'Tribute' (dayneutral) cultivars, greenhouse and field studies were conducted to determine the effects of defoliation on photosynthesis, growth and yield of the strawberry. From preliminary photosynthesis experiments it was found that both 'Redchief' and 'Tribute' strawberry leaves reached maximum net photosynthesis (Pn) concurrently with full leaf expansion at approximately 8 to l0 days and 4 to 5 days, respectively, after unfolding. By exposing the plants to increasing irradiance it was determined that these cultivars were light saturated at 600 to 700)υmol•m-2s-1. Neither cultivar showed a consistent diurnal pattern when Pn was monitored hourly over two consecutive days.

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