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FIELD EVALUATION OF SWEET POTATO CULTIVARS FOR RESISTANCE TO SWEETPOTATO WEEVILS, WHITE GRUBS, AND ROOTWORMS, 2011

FIELD EVALUATION OF SWEET POTATO CULTIVARS FOR RESISTANCE TO SWEETPOTATO WEEVILS, WHITE GRUBS,... Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.M7 (M7) SWEET POTATO: Ipomoea batatas (L.) Lam, ‘Beauregard’ FIELD EVALUATION OF SWEET POTATO CULTIVARS FOR RESISTANCE TO SWEETPOTATO WEEVILS, WHITE GRUBS, AND ROOTWORMS, 2011 Richard N. Story Dept. Entomology, LAES LSU AgCenter Baton Rouge, LA 70803 Phone: (225) 578-1833 Email: rstory@agcenter.lsu.edu M.J. Murray Email: mmurray@agcenter.lsu.edu D.R. LaBonte Dept. Horticulture, LAES LSU AgCenter Baton Rouge, LA 70803 (225) 578-1024 Email: dlabon@agcenter.lsu.edu Sweetpotato weevil: Cylas formicarius elegantulus (Summers) Rootworms (RW): Diabrotica spp. White grubs (WG): Phyllophaga spp. A test was conducted in 2011 at the LSU AgCenter Burden Research Station in Baton Rouge, Louisiana, to determine the resistance of 3 cultivars and 17 breeding lines of sweetpotato to sweetpotato weevils, rootworms and white grubs. Single row plots consisting of 10 plants (12 ft. row length) were arranged in a completely randomized block design with 4 replications. Slips were transplanted on 24 Jun. Roots were harvested on 16 Dec and rated for insect damage. Roots from each plot were evaluated for the presence/absence of sweetpotato weevil damage, rootworm feeding scars, and white grub damage. Data were analyzed with ANOVA using SAS Proc GLM. Rootworm damage was variable, ranging from 40% (08-43w) to 0% (10-80). Beauregard, the susceptible standard, had 28% rootworm damage. None of the cultivars and lines had significantly less rootworm damage compared to Beauregard. Rootworm damage was highly variable among the plots. Sweetpotato weevil damage ranged from 32% (08-31w) to 3% (10-72). The line 03-3w had significantly less weevil damage compared to Beauregard. White grub damage ranged from 14% (10-71), to 0% (several lines and Murasaki). Percent Roots Percent Roots Percent Roots Damaged by Damaged by Damaged by Cultivar/Line Rootworms Sweetpotato Weevil White Grubs 08-43w 40a 29abc 10ab 10-66 39ab 16abc 3bc 10-71 38ab 26abc 14a Evangeline 37abc 25abc 4bc 10-65 29abcd 15abc 0c Beauregard 28abcde 31ab 5bc 10-64 22abcde 21abc 4bc 08-7w 21abcde 28abc 0c 08-29w 19abcde 18abc 1c 08-31w 15abcde 32ab 1c 10-63 13abcde 18abc 0c 10-81 10bcde 21abc 1c 08-46w 10cde 36a 3bc 10-72 6de 3bc 0c Percent Roots Percent Roots Percent Roots Damaged by Damaged by Damaged by Cultivar/Line Rootworms Sweetpotato Weevil White Grubs 08-38w 6de 21abc 0c 08-37w 6de 23abc 0c 10-82 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

FIELD EVALUATION OF SWEET POTATO CULTIVARS FOR RESISTANCE TO SWEETPOTATO WEEVILS, WHITE GRUBS, AND ROOTWORMS, 2011

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Oxford University Press
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2155-9856
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10.4182/amt.2012.M7
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Abstract

Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.M7 (M7) SWEET POTATO: Ipomoea batatas (L.) Lam, ‘Beauregard’ FIELD EVALUATION OF SWEET POTATO CULTIVARS FOR RESISTANCE TO SWEETPOTATO WEEVILS, WHITE GRUBS, AND ROOTWORMS, 2011 Richard N. Story Dept. Entomology, LAES LSU AgCenter Baton Rouge, LA 70803 Phone: (225) 578-1833 Email: rstory@agcenter.lsu.edu M.J. Murray Email: mmurray@agcenter.lsu.edu D.R. LaBonte Dept. Horticulture, LAES LSU AgCenter Baton Rouge, LA 70803 (225) 578-1024 Email: dlabon@agcenter.lsu.edu Sweetpotato weevil: Cylas formicarius elegantulus (Summers) Rootworms (RW): Diabrotica spp. White grubs (WG): Phyllophaga spp. A test was conducted in 2011 at the LSU AgCenter Burden Research Station in Baton Rouge, Louisiana, to determine the resistance of 3 cultivars and 17 breeding lines of sweetpotato to sweetpotato weevils, rootworms and white grubs. Single row plots consisting of 10 plants (12 ft. row length) were arranged in a completely randomized block design with 4 replications. Slips were transplanted on 24 Jun. Roots were harvested on 16 Dec and rated for insect damage. Roots from each plot were evaluated for the presence/absence of sweetpotato weevil damage, rootworm feeding scars, and white grub damage. Data were analyzed with ANOVA using SAS Proc GLM. Rootworm damage was variable, ranging from 40% (08-43w) to 0% (10-80). Beauregard, the susceptible standard, had 28% rootworm damage. None of the cultivars and lines had significantly less rootworm damage compared to Beauregard. Rootworm damage was highly variable among the plots. Sweetpotato weevil damage ranged from 32% (08-31w) to 3% (10-72). The line 03-3w had significantly less weevil damage compared to Beauregard. White grub damage ranged from 14% (10-71), to 0% (several lines and Murasaki). Percent Roots Percent Roots Percent Roots Damaged by Damaged by Damaged by Cultivar/Line Rootworms Sweetpotato Weevil White Grubs 08-43w 40a 29abc 10ab 10-66 39ab 16abc 3bc 10-71 38ab 26abc 14a Evangeline 37abc 25abc 4bc 10-65 29abcd 15abc 0c Beauregard 28abcde 31ab 5bc 10-64 22abcde 21abc 4bc 08-7w 21abcde 28abc 0c 08-29w 19abcde 18abc 1c 08-31w 15abcde 32ab 1c 10-63 13abcde 18abc 0c 10-81 10bcde 21abc 1c 08-46w 10cde 36a 3bc 10-72 6de 3bc 0c Percent Roots Percent Roots Percent Roots Damaged by Damaged by Damaged by Cultivar/Line Rootworms Sweetpotato Weevil White Grubs 08-38w 6de 21abc 0c 08-37w 6de 23abc 0c 10-82

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2012

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