NORTH FLORIDA EXPERIMENT STATION Quincy, Florida Table 2. Effects of Nematocidal and Fungicidal Treatments on Weed Growth, Plant Growth, Reduction of Nematodes, Reduction of Root Diseases, and Crop Data on Dixie Shade Tobacco (DL-4) 1965. Weed Index Plant Heights Treatment and Dates of Avg. 4 Reps. Avg./Plant 4 Reps. Doc.ae per Acre Treatment 3/5 4/2 5/26 5/12 5/19 5/26 6/2 Penphene, 80 lbs. Feb. 4 2.75 3.25 3.75 15.39 24.75 38.91 56.10 NIA-10242, 300 Ibs. Feb. 4 1.75 3.00 3.50 20.11 32.23 49.50 69.43 NIA-10242, 600 Ibs. Feb. 4 1.75 2.75 3.50 17.90 30.53 47.89 67.78 NIA-9227, 550 lbs. Feb. 4 2.00 3.00 3.25 19.54 31.53 48.56 67.35 UC-21149, 80 lbs. Feb. 4 1.75 3.00 3.75 15.44 26.44 43.05 61.75 SKF-21701, 80 Ibs. Feb. 4 2.00 3.00 3.75 15.39 25.35 40.50 58.41 M-2633, 30.5 gals. Feb. 5 2.00 2.25 2.25 20.21 33.33 51.05 71.18 M-2811, 6.1 gals. Feb. 4 2.25 2.00 2.25 19.36 31.00 47.73 65.63 Bayer 25141, 150 + 150 lbs. Feb. 4 + Apr. 19 2,25 3.25 3.25 21.18 33.95 52.25 71.94 Diazinon GA-301, 7.6 gals. Feb. 5 2.00 3.25 3.50 16.81 27.93 43.34 61.18 Diazinon A-1619, 7.4 gals. Feb. 5 2.25 3.25 3.50 17.39 28.56 45.24 63.49 Check, untreated ----- 4.00 4.00 4.00 15.29 25.00 39.35 56.65 L.S.D. 5% 0.93 0.87 0.75 2.74 3.48 5.14 6.87 L.S.D. 1% 1.26 1.16 1.01 3.68 V4.68 6.91 9.24 C.V. (%) 29 20 16 11 8 8 7