Insect Pest Management in Virginia Cotton, Peanut, and Soybean
Insect Pest Management in Virginia Cotton, Peanut, and Soybean
Insect Pest Management in Virginia Cotton, Peanut, and Soybean
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Table 32. Percent external bollworm damage 1 <strong>and</strong> yield, CT11-BW3. Tidewater AREC,<br />
Suffolk, VA, 2011.<br />
Aug 8 Aug 15 L<strong>in</strong>t lb/acre 2<br />
# Variety Protected<br />
Not<br />
protected Protected<br />
Not<br />
protected Protected<br />
Not<br />
protected<br />
1 PHY 375 WRF 0.00 1.00 0.00 0.00 880 840 a<br />
2 PHY 315 RF 0.00 8.00 1.00 2.00 770 643 b<br />
LSD NS NS NS NS NS 127.4<br />
Means with<strong>in</strong> a column followed by the same letter(s) are not significantly different (Protected LSD, P=0.05).<br />
1 External bollworm damage based on a sample of 25 bolls per plot.<br />
2 <strong>Cotton</strong> was harvested on October 24. Gross yields were reduced by 58.6-59.3% to account for seed <strong>and</strong> trash.<br />
Treatment means (% bollworm damage, yield) Aug 8 Aug 15 Yield<br />
1. With <strong>in</strong>secticide ..................................................... 0.000 ................... 0.50 ....................833<br />
2. Without <strong>in</strong>secticide ................................................ 4.500 ................... 1.00 ....................742<br />
LSD ............................................................................ NS....................... NS ....................... NS<br />
Variety mean (% bollworm damage, yield) Aug 8 Aug 15 Yield<br />
1. PHY 375 WRF ....................................................... 0.500 ................... 0.00 .................. 860 a<br />
2. PHY 315 RF ........................................................... 4.000 ................... 1.50 .................. 697 b<br />
LSD ............................................................................ NS....................... NS .................... 110.6<br />
Split plot analysis (% bollworm damage, yield) Aug 8 Aug 15 Yield<br />
Treatment ................................................................... 0.0780 ................. 0.7177 .................0.1382<br />
Variety ........................................................................ 0.1405 ................. 0.2283 .................0.0018<br />
Treatment x variety .................................................... 0.1405 ................. 0.6704 .................0.2807<br />
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