-9-


 (A) 1 x twice-weekly, (B) 2 x1 twice-weekly (C) 1 xl once-weekly, (D) 2 x,
 once-weekly,. (E) 1 x once every 2 weeks, (F) 2 x1 once every 2 weeks, and
 (G) no foliar fertilization (control). Only the treatment receiving the 2 x
 rate applied twice weekly gave lower fruit yields throughout the season. For
 'Dover', the control treatment gave the highest seasonal fruit yield but was
 different only from the treatment receiving the 2 x rate applied twice
 weekly. For 'Tufts', the treatment receiving the 1 x rate applied once
 weekly gave the highest seasonal fruit yield but was different only from the
 treatment receiving the 2 x rate applied twice weekly. Fruit size, firmness,
 and resistance to abrasion were not affected by foliar treatments. The
 percent of the marketable size fruit which were misshapen or fan-shaped or
 had green shoulders were different because of foliar fertilizer treatments,
 but differences were not consistent between cultivars. Data indicated that
 foliar fertilization of strawberries adequately fertilized prior to mulching
 was not beneficial for fruit production.

 21. Durner, E. F., E. B. Poling, and E. E. Albregts. 1986. Early season yield
 responses of selected strawberry cultivars to photoperiod and chilling in a
 Florida winter production system. J. Amer. Soc. Hort. Sci. 111(6):53-56.

 'Douglas', 'Tufts', and 'Pajaro' strawberry (Fragaria X ananassa Duch.)
 plants were sampled for 3 consecutive years ( 1984), and 'Chandler'
 plants were sampled for one year (1984) from September through October from
 a North Carolina nursery. Plants were subjected to short days (12-hr
 photoperiod) at day/night temperatures of 15.50/4.4C in 1982-1983 and to
 short days (9-hr photoperiod) and long days (9-hr photoperiod with a 3-hr
 night interruption) with or without chilling 15.50/4.40 (day/night) or
 22.00/18.00 (day/night), respectively in 1984 for 0, 1, 6, or 12 days in
 the NCSU phytotron. After treatment, plants were shipped to Florida for
 planting in the winter planting system for evaluation of early season yield
 1 Dec. 15 Jan.). Optimum digging dates for all cultivars were observed to
 be a photoperiod response. Chilling enhanced early yield for 'Douglas' and
 'Pajaro' when plants were dug prior to or at the optimum date. Plants dug
 later than the optimum date had much lower yields even with substantial
 chilling. In 'Chandler', slight chilling ( 125 hr from 1 Sept. until
 digging date) suppressed early yield, while increased chilling ( 125 hr)
 enhanced early yield when plants were dug at or prior to the optimum date.
 Chilling decreased early yield in 'Tufts' regardless of digging date.
 Significant yield increases were only obtained with chilling much greater
 than that which naturally occurs in North Carolina.

WEED CONTROL:

 22. Albregts, E. E., and C. M. Howard. 1983. Weed control in the strawberry
 fruit production field. Proc. Fla. State Hort. Soc. 96:75-76.

 Herbicides were applied for 2 seasons to a strawberry (Fragaria X ananassa
 Duch.) fruit production field. During the first season, herbicides were
 applied on 3 October, 1980 in the row middles immediately after transplanting.
 Treatments were napropamide (2-(a-naphthoxyl)-N,N-diethypropionamide) at 6 lb
 a.i./acre, DCPA (dimethyl tetrachloroterephthalate) at 12 Ib. a.i./acre,
 chloroxuron (3-(p-(chlorophenoxy)phenyl)-l,l-dimethylurea) at 6 Ib/a.i./acre,
 and an unhoed check. Plots were evaluated and then cultivated on November 10,
 December 4, and March 3. During the second season, herbicides were applied
 on October 6, 1981 prior to transplanting to row middles and to beds with
 mulch temporarily removed, and on December 28 to row middles only.