Insect Pest Management in Virginia Cotton, Peanut, and Soybean

Table 74. Mean number of larvae per 10 sweeps and percent control 1 , SB11CEW-Speight (Speight farm, Suffolk, VA).
Tidewater AREC, Suffolk, VA, 2011. Insecticide treatments were applied on August 12.
Aug 15 Aug 18
# Material Rate
Small
larvae
Medium
larvae
Large
larvae
Total
larvae
Small
larvae
Medium
larvae
Large
larvae
Total
larvae % control
1 Steward 1.25EC 6 oz/A 6.25 1.50 b 1.50 b 9.25 b 0.00 b 1.25 b 1.00 b 2.25 b 83.2
2 Steward 1.25EC 10 oz/A 0.00 0.50 b 0.00 b 0.50 c 0.00 b 0.50 b 0.00 b 0.50 b 98.5
3 Steward 1.25EC
+ Baythroid XL
6 oz/A
2 oz/A
0.00 0.00 b 0.50 b 0.50 c 0.00 b 0.75 b 1.00 b 1.75 b 96.7
4 Belt 4SC 2 oz/A 0.75 3.00 b 1.00 b 4.75 bc 0.25 b 0.25 b 1.00 b 1.50 b 90.8
5 Belt 4SC 3 oz/A 0.25 3.25 b 1.25 b 4.75 bc 0.00 b 0.00 b 0.50 b 0.50 b 92.3
6 Belt 4SC
+ Baythroid XL
7 Baythroid XL
+ Orthene 97
2 oz/A
2 oz/A
2.8 oz/A
8 oz/A
0.25 0.25 b 0.00 b 0.50 c 0.00 b 0.25 b 0.25 b 0.50 b 98.5
0.25 0.50 b 0.00 b 0.75 c 0.00 b 0.00 b 0.50 b 0.50 b 98.2
8 Larvin 3.2 10 oz/A 1.25 1.25 b 0.25 b 2.75 bc 0.00 b 0.00 b 0.50 b 0.50 b 95.2
9 Larvin 3.2 16 oz/A 0.00 0.25 b 0.25 b 0.50 c 0.00 b 0.00 b 1.25 b 1.25 b 97.4
10 Larvin 3.2
+ Baythroid XL
10 oz/A
2 oz/A
0.00 0.00 b 0.25 b 0.25 c 0.00 b 0.00 b 0.50 b 0.50 b 98.9
11 Cobalt 19 oz/A 0.25 0.50 b 0.25 b 1.00 c 0.00 b 1.75 b 2.50 b 4.25 b 92.3
12 Untreated 4.75 12.75 a 18.00 a 35.50 a 4.00 a 12.25 a 16.50 a 32.75 a ---
LSD NS 3.42 2.35 8.07 0.92 2.07 2.59 3.83 ---
Means within a column followed by the same letter(s) are not significantly different (Protected LSD, P=0.05).
1 Percent control is based on cumulative larval days (CLD) in the treatment relative to the untreated control. CLD’s are calculated with the following equation: