Insect Pest Management in Virginia Cotton, Peanut, and Soybean

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Table 80. 2011 Virginia soybean insecticide usage percentages by district and state total. Total acreage % Acreage % Acreage % Acreage % A District surveyed scouted treated 1 overtreated under Northern 16,858 12.8 21.6 0.0 3 Central 10,600 10.4 20.3 7.5 2 Eastern (total) 245,382 63.3 84.6 5.2 2 Eastern Shore 20,000 90.0 185.0 0.0 1 Mid-Eastern 76,500 71.9 71.5 10.5 2 Southeast 148,882 55.3 77.8 3.2 1 STATE TOTAL 2 272,840 58.1 78.2 5.0 2 1 Acreage treated for all arthropod pests, combined. Treated acreage may exceed actual acrea some acres being treated more than once. 2 State totals are determined using grand total data from Table 79, not by means of district dat 155
Figure 1. Corn earworm regression. Relationship between the percentage of total soybean acreage treated for corn earworm from 1976-2011 and the percentage of corn ears infested in mid-July. Eastern Virginia, 2011. Y = 1.11x – 2.14; R 2 = 0.43 % Soybean acreage treated for corn earworm '82 '92 '10 '07 y = 1.1077x -‐ 2.136 R² = 0.43448 '08 '11 '86 '02 '99 '80 '77 '94 '09 '91 '95 '06 '87 '88 '81 '83 '85 '05 '93 '76 '98 '97 '90N '03 '04 '01 '78 '96 '00 % Corn ears infested '90S 156
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2011 Insect Pest Management in Virg
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ACKNOWLEDGMENTS The authors wish to
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INDEPENDENT CROP CONSULTANTS Chad H
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Contents Acknowledgments ..........
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Climatological Summary of the 2011
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Table 2. Daily precipitation (inche
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Table 3. Soil types, nutrient analy
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Test: CT11-THP-Regional-Irrigated,
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Table 4. Thrips injury ratings 1 ,
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Table 6. Plant height 1 , number of
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Test: CT11-THP-Regional-Dryland, Ef
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Table 10. Plant height 1 , number o
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Test: CT11-THP-Regional-Foliar, Eff
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Table 14. Plant height 1 , number o
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Test: CT11-THP-Regional-Eastern, Va
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Table 16. Thrips injury ratings and
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Test: CT11-THP-Bayer, Evaluation of
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Table 19. Thrips injury ratings and
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Test: CT11-THP-Dow, Efficacy of fol
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Table 21. Stand counts, thrips inju
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Test: CT11-THP-PHY, Test to evaluat
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Table 23. Stand counts, thrips inju
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Table 24. Stand counts, number of n
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Table 26. Mean number of thrips per
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Treatment application(s): Liquid in
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Table 29. Stand counts, plant heigh
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Treatment application(s): Broadcast
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Treatment means (% bollworm damage,
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Table 31. Percent external bollworm
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Test: CT11-BW4, Efficacy of selecte
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Lint 2 Table 35. Percent external b
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Test: CT11-SBUG-Valent, Evaluation
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Table 39. Percent internal boll dam
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Test: PT11-THP-1, Evaluation of in-
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Table 42. Stand counts, PT11-THP-1.
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Test: PT11-THP-2, Evaluation of liq
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Table 46. Stand counts and yield, P
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Treatment application(s): Liquid in
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Page 105 and 106: Table 52. Thrips injury ratings 1 ,
Page 107 and 108: Test: PT11-THP-Syngenta-1, Evaluati
Page 109 and 110: Table 54. Stand counts and thrips i
Page 111 and 112: Table 56. Tomato spotted wilt virus
Page 113 and 114: Treatment application(s): Granular
Page 115 and 116: Table 58. Mean number of thrips per
Page 117 and 118: Test: PT11-THP-VA Lines, Evaluation
Page 119 and 120: Table 61. Thrips injury ratings and
Page 121 and 122: Table 62. Stand counts on May 19 an
Page 123 and 124: Table 63. Mean number of larvae per
Page 125 and 126: Treatment application(s): Full cove
Page 127 and 128: Test: PT11-CEW-3, Evaluation of fol
Page 131 and 132: Table 66. Southern corn rootworm me
Page 133 and 134: Test: SB11-SEED-1, Evaluation of se
Page 135 and 136: Table 68. Thrips injury ratings 1 a
Page 137 and 138: Table 69. Stand counts, thrips coun
Page 139 and 140: Test: SB11-BMSB-1, Efficacy of foli
Page 141 and 142: Table 71 (continued). Mean number o
Page 143 and 144: Table 72. Mean number of brown marm
Page 145 and 146: Table 73. Mean number of brown marm
Page 153 and 154: Table 77. Mean number of insects pe
Page 155: Table 79. Results of the 2011 Virgi
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Insect Pest Management in Virginia Cotton, Peanut, and Soybean

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