(B5) NECTARINE: Prunus persica L., 'Fantasia' Peter W. Shearer Rutgers Agricultural Research and Extension Center 121 Northville Rd Bridgeton, NJ 08302 Phone: (856) 455-3100 Fax: (856) 455-3133 E-mail: email@example.com Ann Rucker Thrips (THP): Frankliniella occidentalis (Pergande) This study was conducted to compare the effectiveness of Spintor 2SC (with and without the surfactant LI- 700) with Lannate at the Rutgers Agricultural Research and Extension Center in Bridgeton, NJ. Treatments were applied on 18 Aug to 6-yr-old 'Fantasia' nectarines using a Rears Airblast sprayer (28 inch fan, 100 psi) delivering 100 gpa and pulled through the orchard at 2.5 mph. The experimental treatments were applied to single-tree plots replicated four times in a RCB design. Trees were spaced 20 ´ 20 ft. All trees received regular sprays for disease management. Fruit damage was assessed on 25 Aug by evaluating 25 fruit per tree (100 fruit per treatment). The damage (silvering caused by feeding thrips) evaluation was based upon abundance (% fruit with silvering) and severity. Severity was determined for individual fruit by scoring the amount of thrips silvering damage (0: no damage; 1 = ≤ 5 mm; 2: = 5 – 15 mm; 3 = ≥15 mm aggregate damage). Thrips pressure was moderate. The low rate of Spintor + LI-700 and the high rate of Spintor provided the best protection against thrips feeding damage (silvering). The addition of LI-700 enhanced the efficacy of the low Spintor rate. These two treatments had the cleanest fruit and the lowest average severity score. Lannate and the low rate of Spintor alone provided comparable protection but these treatments weren't statistically different from the untreated control.
Arthropod Management Tests – Oxford University Press
Published: Jan 1, 2004