-16-


 Relative humidity was monitored in the 1.2 m weatherhouse. Foliage damage
 occurred with the longer off-intervals and lower flower temperatures. The
 bed thermometers gave the best correlation of air temperature with length
 of time for flower surface to reach -l.l1C after irrigation was stopped.
 The regression equation was: time in min = 17.07 + 3.24X1 + 0.08X2 where
 X1 is the air temperature on the non-irrigated bed and X2 is the relative
 humidity. The R2 was 0.76**. Damage to fruit and foliage was slightly
 greater at lower flower temperatures and if the off interval was 30 rather
 than 15 min. Cycling of irrigation during radiation type freezes seems to
 be feasible when the temperature on the mulch is -3.90C or above.

 45. Hochmuth, G. J., S. R. Kostewicz, S. J. Locascio, E. E. Albregts, C. M.
 Howard, and C. D. Stanley. 1986. Freeze protection of strawberries with
 floating row covers. Proc. Fla. State Hort. Soc. 99:307-311.

 Three types of nonwoven and 3 types of polyethylene row covers were evaluat-
 ed alone, and with drip or sprinkler irrigation for freeze protection of.
 strawberries (Fragaria X ananassa Duch.) at Gainesville and Dover, Fla.
 Treatments were applied only during freeze events. Thirteen freeze events
 occurred at Gainesville during the 15 Dec., 1985 to 31 Jan., 1986 period
 while only 4 freeze events occurred during the same period at Dover. Air
 and flower temperatures were' higher under row covers compared to that in
 the uncovered treatment. However, during the 25/25 Dec., 1985 freeze, only
 the 1.5-oz polypropylene (Dover) and the 2.0-oz polypropylene and the
 polyethylene blanket row covers (Gainesville) maintained temperatures above
 300C. Early (Dec. and Jan.) fruit yield produced with some covers used alone
 was equal to that obtained with sprinkler irrigation alone. At Gainesville,
 the use of certain row covers in conjunction with sprinkler irrigation, but
 not with drip, resulted in increased early yield over use of row cover or
 sprinkler irrigation alone.

 46. Zazueta, F. S., E. E. Albregts, and C. D. Stanley. 1986. Rainwater
 harvesting and irrigation tailwater recovery to reduce water use for
 fruiting strawberry. Soil.and Crop Sci. Soc. Fla. Proc. 45:129-131.

 Rainfall and irrigation runoff were collected in a man-made retention pond
 for a period of 1 yr and reused for strawberry (Fragaria X ananassa Duch.)
 irrigation. The study was conducted at a commercial strawberry production
 site without changing cultural and other practices. For the specific
 condition of this site and for 1 yr, pumping from the aquifer was reduced
 by more than 50%. The potential water savings resulting from harvesting
 precipitation and recycling irrigation runoff were demonstrated.

NEMATODES:

 47. Overman, A. J., and C. M. Howard. 1984. Influence of Nemacur and Vydate on
 root-knot, sting, and stunt nematodes and strawberry yield, 1982. Fungicide
 and Nematicide Tests, 39:98.

 Soil treatments were applied on Oct 8; foliar sprays were initiated Dec 21
 at first heavy bloom and applied weekly 3 times thereafter. Soil treatments
 were incorporated 5 cm deep on the bed surface (0.6 m wide) prior to
 sealing a full-bed film of 1.25 mil black polyethylene over each plot. The
 nematode population in soil of each plot was estimated by a modified
 Baermann technique prior to treatment, 11 weeks after soil treatment (at
 the time of the first foliar spray), 15 weeks after soil treatment (1 week