Arthropod Management Tests 2011, Vol. 36 doi: 10.4182/amt.2011.B10 B10 PEACH: Prunus persica L., ‘Blushing Star’ Ann Rucker Rutgers Agricultural Research and Extension Center 121 Northville Rd. Bridgeton, NJ 08302 Phone: (856) 455-3100 ext 4140 Fax: (856) 455-3133 E-mail: firstname.lastname@example.org George Hamilton Email: Hamilton@aesop.rutgers.edu San Jose scale (SJS): Quadraspidiotus perniciosus (Comstock) The experiment was conducted to compare different San Jose scale control treatments at the Rutgers Agricultural Research and Extension Center in Bridgeton, NJ. The experiment was blocked according to over-wintering scale density and was replicated four times. Trees were spaced 20 × 20 ft. The first San Jose scale crawler was observed on 1 Jun. Lorsban + Damoil was applied at delayed dormant on 10 Mar, Movento (6.0 and 9.0 oz.) + LI-700 were applied at petal fall on 19 April, and Centaur + Damoil was applied at crawler stage on 8 Jun to 13-year-old ‘Blushing Star’ peach trees using a Rears airblast sprayer (28 inch fan, 180 psi) delivering 100 gpa and pulled through the orchard at 2.6 mph. San Jose scale fruit damage at harvest was evaluated on 4 Aug by examining 25 fruit/tree (100 fruit/treatment). San Jose scale damage was determined by examining each fruit for aggregate scale damage. Percent damage data was transformed (arcsine) before analysis with ANOVA. Treatment means were separated using Tukey’s Honest Significant Difference, at P≤0.05 level. This research was supported by industry gifts of pesticide and/or research funding. At harvest, all treatments provided protection against scale damage. The 9.0 oz rate of Movento provided the best control. The 6.0 oz and 9.0 oz rates of Movento provided the best protection in the ≤ ¼ inch severity rating (Table 1). Table 1 % fruit damage Damage rating Treatment/ Rate amt % fruit ≤1/4 >1/4 >1/2 formulation Timing product/acre without scale inch inch inch Lorsban 4E delayed dormant 4.0 pt 90.0ab 8.0bc 2.0b 0.0b + Damoil 1.0 gal Movento 240SC petal fall 6.0 oz 96.0ab 4.0bc 0.0b 0.0b + LI-700 1.0 qt Movento 240SC petal fall 9.0 oz 98.0a 2.0c 0.0b 0.0b + LI-700 1.0 qt Centaur 70WDG crawler stage 34.5 oz 87.0b 12.0b 1.0b 0.0b + Damoil 1.0 gal Untreated check --- --- 43.0c 39.0a 10.0a 8.0a Column means followed by the same letter are not significantly different (Tukey’s Honest Significant Difference, P ≤ 0.05), ns = not significant (ANOVA). Delayed dormant application applied 10 Mar; petal fall application applied 19 Apr; crawler stage application applied 8 Jun.
Arthropod Management Tests – Oxford University Press
Published: Jan 1, 2011