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EFFICACY OF ONYX AS A TRUNK SPRAY AND PREVENTATIVE AGAINST ROUNDHEADED APPLETREE BORER, 2004

EFFICACY OF ONYX AS A TRUNK SPRAY AND PREVENTATIVE AGAINST ROUNDHEADED APPLETREE BORER, 2004 (H1) MOUNTAIN-ASH, EUROPEAN: Sorbus aucuparia L. EFFICACY OF ONYX AS A TRUNK SPRAY AND PREVENTATIVE AGAINST ROUNDHEADED APPLETREE BORER, 2004 Stanley R. Swier University of New Hampshire 254 Spaulding Hall Durham, NH 03824-3544 Phone: (603) 862-1733 Fax: (603) 862-1713 E-mail: stanley.swier@unh.edu Alan Rollins Roundheaded appletree borer (RHATB): Saperda candida Fabricius This trial was conducted at a nursery in Loudon, NH. On 30 Jun 2004, fifty-four trees were marked with colored marking tape, eighteen trees per treatment with three treatments (including an untreated check). A 2 gal hand-pump sprayer was used to apply both treatments of Onyx to the bottom 1 ft of the tree, wetting the area until there was sign of run-off. One adult RHATB was observed emerging from a hole at the base of one of the trees. The degree-day reading at time of treatment was 664, at base 50 degree-days. The air temp was 74°F; the sky was sunny, and the wind was less than 5 mph. The trial was rated on 16 Sep by counting the number of new holes and frass at the base of each marked tree. Data were analyzed with ANOVA and means were separated using DMRT (P ≤ 0.05). The timing of the treatments was perfect as adult borers were just emerging. These trees had tremendous tissue proliferation at the graft union as well as extensive suckering. Most of the borer holes were in the graft union, or at the base of the suckers. We feel the differences in control between the high rate and low rate was due to operator technique. The low rate was apparently applied more thoroughly and provided better coverage of the trunk surface and suckers. Onyx provides excellent control of RHATB properly timed with thorough coverage. Rate Total Mean Treatment/formulation oz product/100 gal new holes new holes % control Onyx 2EC 12.8 5 0.28b 89.1 Onyx 2EC 32.0 18 1.0a 60.9 Untreated check -- 46 2.6c -- Means followed by the same letter are not significantly different (P > 0.05, DMRT). Transformations by the square root of [x]; non-transformed means presented. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EFFICACY OF ONYX AS A TRUNK SPRAY AND PREVENTATIVE AGAINST ROUNDHEADED APPLETREE BORER, 2004

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Oxford University Press
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© Published by Oxford University Press.
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2155-9856
DOI
10.1093/amt/30.1.H1
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Abstract

(H1) MOUNTAIN-ASH, EUROPEAN: Sorbus aucuparia L. EFFICACY OF ONYX AS A TRUNK SPRAY AND PREVENTATIVE AGAINST ROUNDHEADED APPLETREE BORER, 2004 Stanley R. Swier University of New Hampshire 254 Spaulding Hall Durham, NH 03824-3544 Phone: (603) 862-1733 Fax: (603) 862-1713 E-mail: stanley.swier@unh.edu Alan Rollins Roundheaded appletree borer (RHATB): Saperda candida Fabricius This trial was conducted at a nursery in Loudon, NH. On 30 Jun 2004, fifty-four trees were marked with colored marking tape, eighteen trees per treatment with three treatments (including an untreated check). A 2 gal hand-pump sprayer was used to apply both treatments of Onyx to the bottom 1 ft of the tree, wetting the area until there was sign of run-off. One adult RHATB was observed emerging from a hole at the base of one of the trees. The degree-day reading at time of treatment was 664, at base 50 degree-days. The air temp was 74°F; the sky was sunny, and the wind was less than 5 mph. The trial was rated on 16 Sep by counting the number of new holes and frass at the base of each marked tree. Data were analyzed with ANOVA and means were separated using DMRT (P ≤ 0.05). The timing of the treatments was perfect as adult borers were just emerging. These trees had tremendous tissue proliferation at the graft union as well as extensive suckering. Most of the borer holes were in the graft union, or at the base of the suckers. We feel the differences in control between the high rate and low rate was due to operator technique. The low rate was apparently applied more thoroughly and provided better coverage of the trunk surface and suckers. Onyx provides excellent control of RHATB properly timed with thorough coverage. Rate Total Mean Treatment/formulation oz product/100 gal new holes new holes % control Onyx 2EC 12.8 5 0.28b 89.1 Onyx 2EC 32.0 18 1.0a 60.9 Untreated check -- 46 2.6c -- Means followed by the same letter are not significantly different (P > 0.05, DMRT). Transformations by the square root of [x]; non-transformed means presented.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2005

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