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CONTROL OF MOUNTAIN LEAFHOPPER ON SWEET CHERRY, 2002

CONTROL OF MOUNTAIN LEAFHOPPER ON SWEET CHERRY, 2002 (B1) CHERRY (SWEET): Prunus avium L., 'Bing' R. A. Van Steenwyk Department of E.S.P.M. 201 Wellman Hall University of California Berkeley, CA 94720-3112 Tel: (510) 643-5159 Fax: (510) 642-4879 bobvanst@nature.berkeley.edu S. K. Zolbrod R. M. Nomoto J. A. Grant University of California Cooperative Extension 420 S. Wilson Way Stockton, CA 95205 Mountain leafhopper (ML): Collandonus montanus (Van Duzee) A trial was conducted on mature 'Bing' cherry trees in a commercial orchard near Linden, CA. Four experimental insecticides and an untreated control were replicated four times in a RCB design. Each replicate consisted of an individual tree with buffer trees in each direction. Treatments were applied between 8:00 a.m. and 10:00 a.m. on 24 Jun with a hand-held orchard sprayer operating at 200 psi and delivering 300 gpa of finished spray (2.76 gal/tree). Control was evaluated at 0, 3, 7, 14, and 21 days after treatment (DAT) by caging 20 laboratory-cultured adult Collandonus montanus (ML) on cherry foliage in 60 x 35 cm mesh bags. ML were caged on the branches at about 6 p.m. The branches were removed the following morning at 6 a.m. The branches were placed in 1000 ml Erlenmeyer flasks filled with water and held in the laboratory at about 75°F. Mortality was determined at 1/2, 1, and 2 days of exposure (DOE). This trial should be considered as a rigorous test of the experimental materials. Any movement from a ML, however small, resulted in scoring the leafhopper alive. However, live ML on treated branches were lethargic and were incapable of feeding. Asana provided superior ML mortality compared to all neonicotinoid insecticides while Actara provided consistently greater ML mortality than Provado or V- 10112. Based on this and past years' research, Actara would be the most effective replacement for Sevin, Diazinon or Guthion. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

CONTROL OF MOUNTAIN LEAFHOPPER ON SWEET CHERRY, 2002

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10.1093/amt/28.1.B1
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Abstract

(B1) CHERRY (SWEET): Prunus avium L., 'Bing' R. A. Van Steenwyk Department of E.S.P.M. 201 Wellman Hall University of California Berkeley, CA 94720-3112 Tel: (510) 643-5159 Fax: (510) 642-4879 bobvanst@nature.berkeley.edu S. K. Zolbrod R. M. Nomoto J. A. Grant University of California Cooperative Extension 420 S. Wilson Way Stockton, CA 95205 Mountain leafhopper (ML): Collandonus montanus (Van Duzee) A trial was conducted on mature 'Bing' cherry trees in a commercial orchard near Linden, CA. Four experimental insecticides and an untreated control were replicated four times in a RCB design. Each replicate consisted of an individual tree with buffer trees in each direction. Treatments were applied between 8:00 a.m. and 10:00 a.m. on 24 Jun with a hand-held orchard sprayer operating at 200 psi and delivering 300 gpa of finished spray (2.76 gal/tree). Control was evaluated at 0, 3, 7, 14, and 21 days after treatment (DAT) by caging 20 laboratory-cultured adult Collandonus montanus (ML) on cherry foliage in 60 x 35 cm mesh bags. ML were caged on the branches at about 6 p.m. The branches were removed the following morning at 6 a.m. The branches were placed in 1000 ml Erlenmeyer flasks filled with water and held in the laboratory at about 75°F. Mortality was determined at 1/2, 1, and 2 days of exposure (DOE). This trial should be considered as a rigorous test of the experimental materials. Any movement from a ML, however small, resulted in scoring the leafhopper alive. However, live ML on treated branches were lethargic and were incapable of feeding. Asana provided superior ML mortality compared to all neonicotinoid insecticides while Actara provided consistently greater ML mortality than Provado or V- 10112. Based on this and past years' research, Actara would be the most effective replacement for Sevin, Diazinon or Guthion.

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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 2003

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