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APPLE, EVALUATION OF VARIOUS TRUNK SPRAYS TO CONTROL BORERS INFESTING BURRKNOTS, 2002

APPLE, EVALUATION OF VARIOUS TRUNK SPRAYS TO CONTROL BORERS INFESTING BURRKNOTS, 2002 (A10) APPLE: Malus domestica Borkhausen APPLE, EVALUATION OF VARIOUS TRUNK SPRAYS TO CONTROL BORERS INFESTING BURRKNOTS, 2002 D. P. Kain N.Y.S. Agric. Expt. Station Geneva, NY 14456 Tel: 315/787/2333 Fax: 315/787/2326 dpk1@nysaes.cornell.edu R. Straub Hudson Valley Lab. Box 727, Route 9W Highland, NY 12528 Tel: 914/691/6516 Fax: 914/691/2719 rws9@cornell.edu A. Agnello N.Y.S. Agric. Expt. Station Geneva, NY 14456 Tel: 315/787/2341 Fax: 315/787/2326 ama4@nysaes.cornell.edu Dogwood borer (DWB): Synanthedon scitula (Harris) We tested the efficacy of postharvest (October 2001) application of Lorsban 4E and efficacy of a number of more recently introduced insecticides, including Intrepid, Surround, Danitol and Avaunt, against a standard treatment of Lorsban 4E applied at tight cluster (19 Apr). Treatments were arranged randomly in 3 row x 15 tree plots and were replicated 3 times in one location. Test materials were applied in coarse sprays with a handgun using a Rears Nifty-Pul-Tank sprayer operating at 150 psi. Spray was directed at burrknots and approximately 0.5 pt was applied per tree. Trees were on M.26 rootstock and expressed numerous burrknots. Burrknots were examined for freshly produced frass (as an indication of infestation) 20 Jun and 1 Oct. A tree was considered infested if any fresh frass was present, regardless of the number of burrknots per tree. Ten trees in the middle row of each plot were examined for frass. Data (proportion trees infested per plot) were transformed by arcsine squareroot and analyzed using Fisher's Protected LSD test (P < 0.05). Infested trees were examined for larvae and the number of larvae per tree, regardless of the number of burrknots, was recorded. Data (number of larvae per 10 trees) were transformed by squareroot and analyzed using Fisher's Protected LSD test (P < 0.05). The postbloom chlorpyrifos application was significantly different (20 Jun) from the untreated check and equivalent to the standard prebloom application (Table 1). Intrepid, the only other treatment applied (at tight cluster against overwintering larvae) was not different from the check. The Danitol treatment was different from the check due to natural variation (treatment was after evaluation). In the October evaluation, both Lorsban treatments, the Avaunt treatment, and the Danitol treatment were significantly better than the check, both in terms of the percentage of trees infested and the number of larvae found. Intrepid and Surround were not effective. In 2001 trials, efficacy of Avaunt applied at petal fall was little or no different from the check. Avaunt applied at petal fall + 18 Jul was no better than the check in a June rating but was in a September rating. In 2002, it appears that it was more effective because application timing covered the flight of dogwood borer. Results over the 2 yr suggest that Avaunt does not infiltrate the burrknot to kill overwintering larvae, as does Lorsban, but that it is effective against dogwood borer when applied preventatively. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

APPLE, EVALUATION OF VARIOUS TRUNK SPRAYS TO CONTROL BORERS INFESTING BURRKNOTS, 2002

Arthropod Management Tests , Volume 28 (1) – Jan 1, 2003

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2155-9856
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10.1093/amt/28.1.A10
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Abstract

(A10) APPLE: Malus domestica Borkhausen APPLE, EVALUATION OF VARIOUS TRUNK SPRAYS TO CONTROL BORERS INFESTING BURRKNOTS, 2002 D. P. Kain N.Y.S. Agric. Expt. Station Geneva, NY 14456 Tel: 315/787/2333 Fax: 315/787/2326 dpk1@nysaes.cornell.edu R. Straub Hudson Valley Lab. Box 727, Route 9W Highland, NY 12528 Tel: 914/691/6516 Fax: 914/691/2719 rws9@cornell.edu A. Agnello N.Y.S. Agric. Expt. Station Geneva, NY 14456 Tel: 315/787/2341 Fax: 315/787/2326 ama4@nysaes.cornell.edu Dogwood borer (DWB): Synanthedon scitula (Harris) We tested the efficacy of postharvest (October 2001) application of Lorsban 4E and efficacy of a number of more recently introduced insecticides, including Intrepid, Surround, Danitol and Avaunt, against a standard treatment of Lorsban 4E applied at tight cluster (19 Apr). Treatments were arranged randomly in 3 row x 15 tree plots and were replicated 3 times in one location. Test materials were applied in coarse sprays with a handgun using a Rears Nifty-Pul-Tank sprayer operating at 150 psi. Spray was directed at burrknots and approximately 0.5 pt was applied per tree. Trees were on M.26 rootstock and expressed numerous burrknots. Burrknots were examined for freshly produced frass (as an indication of infestation) 20 Jun and 1 Oct. A tree was considered infested if any fresh frass was present, regardless of the number of burrknots per tree. Ten trees in the middle row of each plot were examined for frass. Data (proportion trees infested per plot) were transformed by arcsine squareroot and analyzed using Fisher's Protected LSD test (P < 0.05). Infested trees were examined for larvae and the number of larvae per tree, regardless of the number of burrknots, was recorded. Data (number of larvae per 10 trees) were transformed by squareroot and analyzed using Fisher's Protected LSD test (P < 0.05). The postbloom chlorpyrifos application was significantly different (20 Jun) from the untreated check and equivalent to the standard prebloom application (Table 1). Intrepid, the only other treatment applied (at tight cluster against overwintering larvae) was not different from the check. The Danitol treatment was different from the check due to natural variation (treatment was after evaluation). In the October evaluation, both Lorsban treatments, the Avaunt treatment, and the Danitol treatment were significantly better than the check, both in terms of the percentage of trees infested and the number of larvae found. Intrepid and Surround were not effective. In 2001 trials, efficacy of Avaunt applied at petal fall was little or no different from the check. Avaunt applied at petal fall + 18 Jul was no better than the check in a June rating but was in a September rating. In 2002, it appears that it was more effective because application timing covered the flight of dogwood borer. Results over the 2 yr suggest that Avaunt does not infiltrate the burrknot to kill overwintering larvae, as does Lorsban, but that it is effective against dogwood borer when applied preventatively.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2003

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