Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

EVALUATION OF FOLIAR INSECTICIDES FOR CONTROLLING GREEN PEACH APHIDS IN SPINACH, 2002

EVALUATION OF FOLIAR INSECTICIDES FOR CONTROLLING GREEN PEACH APHIDS IN SPINACH, 2002 (E68) SPINACH: Spinacia oleracea L., 'Decatur' EVALUATION OF FOLIAR INSECTICIDES FOR CONTROLLING GREEN PEACH APHIDS IN SPINACH, 2002 Thomas P. Kuhar Virginia Tech Eastern Shore AREC 33446 Research Drive Painter, VA 23420 Tel: (757) 414-0724 ext. 14 E-mail: tkuhar@vt.edu John Speese III jspeese@vt.edu Roberto J. Cordero Vonny M. Barlow Green peach aphid (GPA): Myzus persicae (Sulzer) Spinach was transplanted on 4 Sep at Van Kesteren Farms near Tasley, VA. Each plot consisted of six 20-ft rows in a 5 ft wide bed, with 3-ft spacing between beds. The experiment had 10 treatments plus a check arranged in a RCBD and replicated four times. On 2 Dec, pre-treatment samples of aphids in each replicate indicated a mean of 42.8 gpa/10 leaves. A single application of each treatment was made on 2 Dec using a propane-pressurized sprayer that delivered 35 gpa of spray at 40 psi through a boom equipped with three flat fan nozzles (T Jet 8003). To evaluate efficacy, the total number of live aphids was counted on 10 randomly picked leaves/plot on 6, 10, and 16 Dec. Data were analyzed using ANOVA and means separated by LSD at P < 0.05. The 16 Dec data were re-analyzed without the check, which was significantly different than all other treatments at P < 0.05. Green peach aphid (GPA) pressure was low, and prolonged periods of cold, wet weather during the test period resulted in slow reproduction rates and variable populations among plots. Although the untreated check and the Warrior treatments had higher GPA numbers than most of the other treatments on the first two dates, there was no statistically significant treatment effect. On 16 Dec, which was 14 day after treatment, GPA populations had increased, resulting in significant differences between the check and all treatments. Also, Warrior had significantly more GPA than all of the other treatments, but was lower than the check. Provado 1.6F and 75WG, Confidor 200SL Forte, and all rates of Actara 25WG provided the best control of GPA. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EVALUATION OF FOLIAR INSECTICIDES FOR CONTROLLING GREEN PEACH APHIDS IN SPINACH, 2002

Loading next page...
 
/lp/oxford-university-press/evaluation-of-foliar-insecticides-for-controlling-green-peach-aphids-uPUOp3YKwe
Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.1093/amt/28.1.E68
Publisher site
See Article on Publisher Site

Abstract

(E68) SPINACH: Spinacia oleracea L., 'Decatur' EVALUATION OF FOLIAR INSECTICIDES FOR CONTROLLING GREEN PEACH APHIDS IN SPINACH, 2002 Thomas P. Kuhar Virginia Tech Eastern Shore AREC 33446 Research Drive Painter, VA 23420 Tel: (757) 414-0724 ext. 14 E-mail: tkuhar@vt.edu John Speese III jspeese@vt.edu Roberto J. Cordero Vonny M. Barlow Green peach aphid (GPA): Myzus persicae (Sulzer) Spinach was transplanted on 4 Sep at Van Kesteren Farms near Tasley, VA. Each plot consisted of six 20-ft rows in a 5 ft wide bed, with 3-ft spacing between beds. The experiment had 10 treatments plus a check arranged in a RCBD and replicated four times. On 2 Dec, pre-treatment samples of aphids in each replicate indicated a mean of 42.8 gpa/10 leaves. A single application of each treatment was made on 2 Dec using a propane-pressurized sprayer that delivered 35 gpa of spray at 40 psi through a boom equipped with three flat fan nozzles (T Jet 8003). To evaluate efficacy, the total number of live aphids was counted on 10 randomly picked leaves/plot on 6, 10, and 16 Dec. Data were analyzed using ANOVA and means separated by LSD at P < 0.05. The 16 Dec data were re-analyzed without the check, which was significantly different than all other treatments at P < 0.05. Green peach aphid (GPA) pressure was low, and prolonged periods of cold, wet weather during the test period resulted in slow reproduction rates and variable populations among plots. Although the untreated check and the Warrior treatments had higher GPA numbers than most of the other treatments on the first two dates, there was no statistically significant treatment effect. On 16 Dec, which was 14 day after treatment, GPA populations had increased, resulting in significant differences between the check and all treatments. Also, Warrior had significantly more GPA than all of the other treatments, but was lower than the check. Provado 1.6F and 75WG, Confidor 200SL Forte, and all rates of Actara 25WG provided the best control of GPA.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2003

There are no references for this article.