NFREC Quincy and AREC, Live Oak, Florida


Table 6. Effects of Certain Insecticidal Treatments on Grasshopper Damage Ratings, Yield, and Dollar Return
 per Acre of Flue-Cured Tobacco (K-326) 1988.

 Grasshopper ,d Yield Dollar Mean Rate
 bDamage Rating Lbs./Acre d Return/Acre d Lbs. AI/Acre/
Treatment' 6/8 Mean 3 Reps. Mean 3 Reps. Application

Lannate, 0.29%S (1.8 lbs./gal. L) 6.3cd 3,666a 4,855a 0.701
Lannate, 0.58%S (1.8 lbs./gal. L) 5.0bc 3,386a 4,363a 1.362
Orthene, 0.5%S (75% SP) 3.0ab 3,668a 5,049a 1.163
Orthene, 1.0%S (75% SP) 1.3a 3,170a 4,093a 2.259
Capture, 0.027%S (2.0 lbs./gal. EC) 2.0a 3,349a 4,506a 0.062
Capture, 0.051%S (2.0 lbs./gal. EC) 1.0a 3,371a 4,418a 0.113
F-7869, 0.0236%S (0.42 lb./gal. EC) 3.7abc 3,025a 3,929a 0.045
F-7869, 0.0472%S (0.42 lb./gal. EC) 2.7ab 2,975a 3,864a 0.093
F-7869, 0.0708%S (0.42 lb./gal. EC) 2.7ab 2,987a 3,907a 0.146
Check (Untreated) 8.0d 2,871a 3,786a

LSD 5% 2.7 NS NS
LSD 1% 3.7 NS NS

aSee Table 1 for more details. Sprays were applied on 4/27, 5/11, 5/25, 6/8, 6/22, and 7/6/88.
Tobacco was transplanted on 3/21/88. Plants were hand topped on 5/31/88. Sucker control was applied:
Royal Tac 6/2 and MH-30 on 6/10/88. Plants were hand suckered on 6/9/88. Tobacco was harvested on 6/7,
6/21, 7/5, and 7/25/88.
,Rating System: 0 = None and 10 = 100% of foliage showing some damage from Melanoplus femurrubrum (DeGeer).
Means followed by the same letter are not significantly different at the 5% level.