A Southwide Rate Test of Azinphosmethyl (Guthion®) for Cone and Seed Insect Control in Loblolly Pine Seed Orchards

Mangini, Alex C.; Barber, Larry R.; Cameron, Ron; DeBarr, Gary L.; Hodge, Gary R.; Jett, J. B.; Lowe, W.L.; McConnell, James; Nord, John C.; Taylor, J. W.

doi:10.1093/sjaf/22.2.106

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…Important seed-feeding insects include the multivoltine leaffooted pine seed bug, Leptoglossus corculus (Say) (Heteroptera: Coreidae), and the univoltine shieldbacked pine seed bug, Tetyra bipunctata (Herrich-Schaffer) (Heteroptera: Scutelleridae). Insecticides are often applied four to six times annually by helicopter or fixed-wing aircraft to control this complex of pests (Nord et al 1985;Lowe et al 1994;Mangini et al 1998). Most insecticides applied to control Dioryctria spp.…”

Section: Introductionmentioning

confidence: 99%

Degree-day model for timing insecticide applications to controlDioryctria amatella(Lepidoptera: Pyralidae) in loblolly pine seed orchards

et al. 2002

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Because Dioryctria amatella (Hulst) is a key pest in loblolly pine, Pinus taeda L. (Pinaceae), seed orchards in the southeastern United States, improved timing of insecticide applications would be valuable for its control. To time two fenvalerate (Pydrin® 2.4 EC) applications we tested four variations of a degree-day model that was developed to predicted when various proportions of D. amatella eggs would hatch during the spring generation. We compared reductions in Dioryctria spp. cone damage to unsprayed checks and a standard operational spray regime of four monthly applications of fenvalerate. In addition, we examined seeds from healthy cones to determine if sprays to control D. amatella also reduced seed damage caused by Leptoglossus corculus Say (Heteroptera: Coreidae) and Tetyra bipunctata (Herrich-Schäffer) (Heteroptera: Scutelleridae). Trials were conducted from 1984 to 1986 in two orchards in South Carolina and one in Alabama. Degree-day accumulations (threshold = 11 °C) were begun on the day when the cumulative number of male D. amatella equaled or exceeded five captured in 15 Pherocon 1C® traps baited with 100 μg of Z-11-hexadecenyl acetate. One application per year was insufficient to control D. amatella or reduced seed-bug damage. Two sprays based on D. amatella phenology significantly reduced coneworm and seed bug damage, and were as effective as four sprays applied monthly. None of the treatments reduce spring cone losses, which are primarily caused by Dioryctria merkeli Mutuura and Monroe. Several variations of the model performed well, but we suggest that the best, based on efficacy and ease of use, was when sprays were applied immediately after five males were caught (degree-day = 0) and again when the model predicted 50% of the spring generation eggs had hatched.

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Section: Introductionmentioning

confidence: 99%

Degree-day model for timing insecticide applications to controlDioryctria amatella(Lepidoptera: Pyralidae) in loblolly pine seed orchards

et al. 2002

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(3Z,6Z,9Z,12Z,15Z)-Pentacosapentaene and (Z)-11-Hexadecenyl Acetate: Sex Attractant Blend for Dioryctria amatella (Lepidoptera: Pyralidae)

Miller¹,

Millar²,

Mangini³

et al. 2010

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In 2006-2008, we tested (3Z,6Z,9Z,12Z,15Z)-pentacosapentaene (pentaene) with the pheromone components (Z)-11-hexadecenyl acetate (Z11-16:Ac) and (Z)-9-tetradecenyl acetate (Z9-14:Ac), as sex attractants for four sympatric species of coneworms, Dioryctria Zeller (Lepidoptera: Pyralidae) in slash (Pinus elliottii Engelm.) and loblolly pine (Pinus taeda L.) seed orchards in Georgia and Louisiana, respectively. The addition ofpentaene increased catches of male southern pine coneworm, Dioryctria amatella (Hulst), in wing traps baited with Z11-16:Ac, whereas catches of Dioryctria disclusa Heinrich in traps baited with Z9-14:Ac were unaffected by the addition of pentaene. The effect of pentaene on male Dioryctria merkeli Mutuura & Munroe was inconsistent. In 2006, pentaene seemed to inhibit attraction of D. merkeli to traps baited with Z9-14:Ac, whereas in a subsequent trial in 2008, moths were equally attracted to Z9-14:Ac with or without the pentaene. We caught too few Dioryctria clarioralis (Walker) in any experiment for meaningful analyses. Our field results with pentaene and the unresolved complexity of the taxonomy, ecology, and management of southern coneworms support the need for a comprehensive examination of the chemical ecology of Dioryctria spp.

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A Southwide Rate Test of Azinphosmethyl (Guthion®) for Cone and Seed Insect Control in Loblolly Pine Seed Orchards

Cited by 2 publications

References 7 publications

Degree-day model for timing insecticide applications to controlDioryctria amatella(Lepidoptera: Pyralidae) in loblolly pine seed orchards

Degree-day model for timing insecticide applications to controlDioryctria amatella(Lepidoptera: Pyralidae) in loblolly pine seed orchards

(3<I>Z</I>,6<I>Z</I>,9<I>Z</I>,12<I>Z</I>,15<I>Z</I>)-Pentacosapentaene and (<I>Z</I>)-11-Hexadecenyl Acetate: Sex Attractant Blend for <I>Dioryctria amatella</I> (Lepidoptera: Pyralidae)

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