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INFLUENCE OF SEED TREATMENTS AND GRANULAR INSECTICIDE ON TWO PEANUT CULTIVARS FOR THRIPS MANAGEMENT, 2013

INFLUENCE OF SEED TREATMENTS AND GRANULAR INSECTICIDE ON TWO PEANUT CULTIVARS FOR THRIPS... Arthropod Management Tests 2014, Vol. 39 doi: 10.4182/amt.2014.F30 (F30) PEANUT: Arachis hypogaea L., ‘Bailey’ and ‘Sugg’ INFLUENCE OF SEED TREATMENTS AND GRANULAR INSECTICIDE ON TWO PEANUT CULTIVARS FOR THRIPS MANAGEMENT, 2013 R. Whalen Virginia Tech Tidewater Agric. Res. & Ext. Ctr. 6321 Holland Road Suffolk, VA 23437 Phone: (757) 657-6450 Fax: (757) 657-9333 Email: wrebec9@vt.edu D.A. Herbert, Jr. S. Malone Tobacco thrips (TT): Frankliniella fusca (Hinds) Selected seed treatments and an in-furrow, at planting granular insecticide were evaluated for control of thrips in two peanut cultivars. ‘Sugg’ and ‘Bailey’ peanut were planted 9 May at the Virginia Tech Tidewater Agric. Res. & Ext. Ctr., Suffolk, VA, using 36-inch row spacing. Cruiser Maxx Peanuts and Dynasty seed treatments were applied commercially. Granular in-furrow Thimet treatments were applied into the seed furrow at the time of planting using tractor-mounted inverted polypropylene jars with lid holes calibrated to deliver exact amounts via gravity. A RCB experimental design was used with 4 replicates; plots were 4 rows by 35 ft. Thrips injury to plants was determined by visually rating injury using a 0 to 10 scale, where 0 = no injury, 1 = 10% leaves injured, 2 = 20% leaves injured, 3 = 30% leaves injured, 4 = 40% leaves injured, 5 = ≥ 50% leaves injured and ≤ 5% terminal buds injured, 6 = ≥ 50% leaves injured and 25% terminal buds injured, 7 = ≥ 50% leaves injured and 50% terminal buds injured, 8 = ≥ 50% leaves injured and 75% terminal buds injured, 9 = ≥ 50% leaves injured and 90% terminal buds injured, and 10 = dead plants. Thrips counts were determined by collecting ten unopened terminal leaflets per plot in vials containing 30 ml soapy water, teasing the leaflets open, and counting TT under a stereoscope following suction filtration. Peanut stand was determined on 24 May by counting all plants in rows one and two of each plot. The number of plants with visual symptoms of Tomato spotted wilt (TSW) was determined by examining two rows per plot on two dates. Peanuts were dug on 26 Sep. Yields were determined by combining peanuts from 2 rows of each plot on 2 Oct and adjusting to 7% moisture. Data were analyzed using ANOVA and LSD statistical procedures. Thrips injury levels were lowest in plots where Thimet was included as part of the treatment. The number of adult thrips per 10 terminal leaflets was not significantly different for any treatment and immatures were more in the Dynasty PD and CruiserMaxx Peanuts treatments applied alone. Numerically, Sugg cultivar treated with CruiserMaxx Peanuts had the most plants per 35 row ft. There were significant differences in yield ranging from 5,714 to 7,033 lbs/acre. This research was supported by industry gifts of products and research funding. 1 Arthropod Management Tests 2014, Vol. 39 doi: 10.4182/amt.2014.F30 Thrips per 10 terminal leaflets Plants per TSW hits per Treatment/ Thrips injury rating 22 May 30 May 4 Jun 12 Jun 35 row ft 70 row ft formulation and Yield Cultivar rate/acre 29 May 4 Jun 10 Jun 17 Jun Immature Adult Immature Adult Immature Adult Immature Adult 24 May 13 Aug 25 Sep lb/acre Sugg Dynasty PD 2.94a 3.75a 5.13a 6.25a 1.75 2.50 1.00 4.00 14.00b 4.50 13.25b 1.50 85.0bc 0.00 8.00a 5,714d Sugg CruiserMaxx Peanuts 1.00b 1.50b 3.25b 5.31b 0.50 1.25 1.25 6.25 8.25b 5.75 39.25a 1.50 96.1a 0.00 5.75a-c 6,120cd Sugg Dynasty PD 0.69cd 0.69c 0.75c 0.94c 0.75 1.50 0.50 3.00 4.00b 6.00 6.25b 4.00 93.6a 0.00 3.00b-d 6,558a-c +Thimet 20G @ 5 lb Sugg CruiserMaxx Peanuts 0.56d 0.56c 0.75c 1.06c 0.00 0.75 0.00 3.25 2.75b 7.00 5.00b 5.25 94.1a 2.00 7.00ab 6,501bc +Thimet 20G @ 5 lb Bailey Dynasty PD 2.94a 3.69a 5.13a 6.25a 1.00 3.00 2.00 3.50 28.75a 6.25 25.25ab 1.75 92.3ab 0.00 1.50cd 6,390bc Bailey CruiserMaxx Peanuts 0.81bc 1.38b 3.25b 5.31b 0.25 1.50 0.75 6.25 9.00b 4.25 39.50a 2.25 84.8bc 0.75 2.75b-d 6,212c Bailey Dynasty PD 0.56d 0.69c 0.75c 0.94c 0.75 1.00 1.00 5.75 4.25b 3.00 10.00b 2.50 90.0ab 0.00 1.25d 6,713ab +Thimet 20G @ 5 lb Bailey CruiserMaxx Peanuts 0.56d 0.56c 0.75c 1.06c 0.00 1.50 1.75 5.00 7.00b 8.50 14.00b 3.00 81.8c 0.00 2.50cd 7,033a +Thimet 20G @ 5 lb LSD 0.21 0.26 0.14 0.27 NS NS NS NS 12.79 NS 22.90 NS 8.16 NS 4.32 485.5 Means within a column followed by the same letter(s) are not significantly different (Protected LSD, P>0.05). Thrips injury rated on a 0-10 scale, 0=no thrips injury and 10=dead plants. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

INFLUENCE OF SEED TREATMENTS AND GRANULAR INSECTICIDE ON TWO PEANUT CULTIVARS FOR THRIPS MANAGEMENT, 2013

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Oxford University Press
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© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.4182/amt.2014.F30
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Abstract

Arthropod Management Tests 2014, Vol. 39 doi: 10.4182/amt.2014.F30 (F30) PEANUT: Arachis hypogaea L., ‘Bailey’ and ‘Sugg’ INFLUENCE OF SEED TREATMENTS AND GRANULAR INSECTICIDE ON TWO PEANUT CULTIVARS FOR THRIPS MANAGEMENT, 2013 R. Whalen Virginia Tech Tidewater Agric. Res. & Ext. Ctr. 6321 Holland Road Suffolk, VA 23437 Phone: (757) 657-6450 Fax: (757) 657-9333 Email: wrebec9@vt.edu D.A. Herbert, Jr. S. Malone Tobacco thrips (TT): Frankliniella fusca (Hinds) Selected seed treatments and an in-furrow, at planting granular insecticide were evaluated for control of thrips in two peanut cultivars. ‘Sugg’ and ‘Bailey’ peanut were planted 9 May at the Virginia Tech Tidewater Agric. Res. & Ext. Ctr., Suffolk, VA, using 36-inch row spacing. Cruiser Maxx Peanuts and Dynasty seed treatments were applied commercially. Granular in-furrow Thimet treatments were applied into the seed furrow at the time of planting using tractor-mounted inverted polypropylene jars with lid holes calibrated to deliver exact amounts via gravity. A RCB experimental design was used with 4 replicates; plots were 4 rows by 35 ft. Thrips injury to plants was determined by visually rating injury using a 0 to 10 scale, where 0 = no injury, 1 = 10% leaves injured, 2 = 20% leaves injured, 3 = 30% leaves injured, 4 = 40% leaves injured, 5 = ≥ 50% leaves injured and ≤ 5% terminal buds injured, 6 = ≥ 50% leaves injured and 25% terminal buds injured, 7 = ≥ 50% leaves injured and 50% terminal buds injured, 8 = ≥ 50% leaves injured and 75% terminal buds injured, 9 = ≥ 50% leaves injured and 90% terminal buds injured, and 10 = dead plants. Thrips counts were determined by collecting ten unopened terminal leaflets per plot in vials containing 30 ml soapy water, teasing the leaflets open, and counting TT under a stereoscope following suction filtration. Peanut stand was determined on 24 May by counting all plants in rows one and two of each plot. The number of plants with visual symptoms of Tomato spotted wilt (TSW) was determined by examining two rows per plot on two dates. Peanuts were dug on 26 Sep. Yields were determined by combining peanuts from 2 rows of each plot on 2 Oct and adjusting to 7% moisture. Data were analyzed using ANOVA and LSD statistical procedures. Thrips injury levels were lowest in plots where Thimet was included as part of the treatment. The number of adult thrips per 10 terminal leaflets was not significantly different for any treatment and immatures were more in the Dynasty PD and CruiserMaxx Peanuts treatments applied alone. Numerically, Sugg cultivar treated with CruiserMaxx Peanuts had the most plants per 35 row ft. There were significant differences in yield ranging from 5,714 to 7,033 lbs/acre. This research was supported by industry gifts of products and research funding. 1 Arthropod Management Tests 2014, Vol. 39 doi: 10.4182/amt.2014.F30 Thrips per 10 terminal leaflets Plants per TSW hits per Treatment/ Thrips injury rating 22 May 30 May 4 Jun 12 Jun 35 row ft 70 row ft formulation and Yield Cultivar rate/acre 29 May 4 Jun 10 Jun 17 Jun Immature Adult Immature Adult Immature Adult Immature Adult 24 May 13 Aug 25 Sep lb/acre Sugg Dynasty PD 2.94a 3.75a 5.13a 6.25a 1.75 2.50 1.00 4.00 14.00b 4.50 13.25b 1.50 85.0bc 0.00 8.00a 5,714d Sugg CruiserMaxx Peanuts 1.00b 1.50b 3.25b 5.31b 0.50 1.25 1.25 6.25 8.25b 5.75 39.25a 1.50 96.1a 0.00 5.75a-c 6,120cd Sugg Dynasty PD 0.69cd 0.69c 0.75c 0.94c 0.75 1.50 0.50 3.00 4.00b 6.00 6.25b 4.00 93.6a 0.00 3.00b-d 6,558a-c +Thimet 20G @ 5 lb Sugg CruiserMaxx Peanuts 0.56d 0.56c 0.75c 1.06c 0.00 0.75 0.00 3.25 2.75b 7.00 5.00b 5.25 94.1a 2.00 7.00ab 6,501bc +Thimet 20G @ 5 lb Bailey Dynasty PD 2.94a 3.69a 5.13a 6.25a 1.00 3.00 2.00 3.50 28.75a 6.25 25.25ab 1.75 92.3ab 0.00 1.50cd 6,390bc Bailey CruiserMaxx Peanuts 0.81bc 1.38b 3.25b 5.31b 0.25 1.50 0.75 6.25 9.00b 4.25 39.50a 2.25 84.8bc 0.75 2.75b-d 6,212c Bailey Dynasty PD 0.56d 0.69c 0.75c 0.94c 0.75 1.00 1.00 5.75 4.25b 3.00 10.00b 2.50 90.0ab 0.00 1.25d 6,713ab +Thimet 20G @ 5 lb Bailey CruiserMaxx Peanuts 0.56d 0.56c 0.75c 1.06c 0.00 1.50 1.75 5.00 7.00b 8.50 14.00b 3.00 81.8c 0.00 2.50cd 7,033a +Thimet 20G @ 5 lb LSD 0.21 0.26 0.14 0.27 NS NS NS NS 12.79 NS 22.90 NS 8.16 NS 4.32 485.5 Means within a column followed by the same letter(s) are not significantly different (Protected LSD, P>0.05). Thrips injury rated on a 0-10 scale, 0=no thrips injury and 10=dead plants.

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Arthropod Management TestsOxford University Press

Published: Jan 1, 2014

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