(G8) BERMUDAGRASS: Cynodon dactylon L. Pers X Cynodon transvaalensis Burtt-Davy COMPARISON OF GENERIC BIFENTHRIN AND TALSTAR FORMULATIONS FOR MOLE CRICKET NYMPH CONTROL ON GOLF COURSES, 2002 J. Bryan Unruh West Florida Research and Education Center Institute of Food and Agricultural Sciences University of Florida 5988 Hwy. 90 W., Bldg. 4900 Milton, FL 32583 Tel: (850) 995-3720 ext. 108 Fax: (850) 995-3723
[email protected] Eileen A. Buss Entomology and Nematology Department University of Florida PO Box 110620 Gainesville, FL 32611 Tel: (352) 392-1901 ext. 116 Fax: (352) 392-0190
[email protected] Tawny mole cricket (TMC): Scapteriscus vicinus Scudder Two experiments were conducted at Tiger Point Country Club, Gulf Breeze, FL on two fairways (Tifway 419 bermudagrass) to compare the efficacy of Top Pro Specialties' generic bifenthrin formulations with Talstar EZ and Talstar GC Flowable (FMC Corp.). Trials were initiated on 24 May (granular) and 30 May (flowable) with each plot measuring 2,000 ft2 . Experimental design was a CRB and each treatment was replicated four times. Granular formulations were applied with a handheld broadcast applicator and flowable formulations were applied with a boom sprayer calibrated to deliver 40 gpa of spray solution at 25 psi operating pressure. Environmental conditions on 24 May were 79 and 75°F ambient and 2-inch soil temperature, respectively, 90% cloud cover, and 3 MPH wind speed. Conditions on 30 May were 80 and 77°F ambient and 2-inch soil temperature, respectively, no cloud cover, and 5 MPH wind speed. Pretreatment soil moisture was adequate and plots received 0.25 inch of water using the in-ground irrigation system following treatment application for both trials. Damage levels of a natural tawny mole cricket (TMC) population were determined by placing a 10.8 ft2 grid, divided into nine subsections, randomly in each plot and rating damage on 0-9 scale given based on the number of subsections with fresh mole cricket damage (0 = no damage and 9 = severe damage). Ten damage estimates per plot were taken on each sampling date. Actual damage means for each sampling date are reported in the tables. All data were transformed square root (x + 0.5) prior to ANOVA and means were separated by LSD (P < 0.05). At 18, 39, and 48 DAT, granular treatments (Table 1) did not statistically differ from each other, but were different from the untreated check. At 68 DAT, bifenthrin at 150 lb/acre (generic and Talstar EZ) exhibited better control than either material applied at 100 lb/acre. Similarly, on all sampling dates, the flowable formulations of bifenthrin (Table 2) were not different from each other, but were different than the untreated check. From these results, there appears to be no significant difference between Top Pro
Specialties' generic bifenthrin and Talstar EZ granular formulations.
