|Christianson Jr, Brad|
Submitted to: Western Orchard Pest and Disease Management Conference
Publication Type: Abstract Only
Publication Acceptance Date: 11/15/1999
Publication Date: 1/5/2000
Citation: Knight, A.L., Christianson Jr, B.A., Cockfield, S., Dunley, J. 2000. Brewster area wide management of oblique banded leafroller and codling moth: year 2. Western Orchard Pest and Disease Management Conference. p. 21. Interpretive Summary:
Technical Abstract: The Brewster Dual Areawide Management (BDAM) is the only western areawide project that has implemented wide scale adoption of sex pheromones for mating disruption of both codling moth and leafrollers. The BDAM project began in 1998 and consists of 14 growers managing ca. 500 acres of apple. BDAM is situated within the 4,000 acre BAM project. Growers within BAM are using Isomate-C+ for codling moth. Results from the original BDAM site were compared with the 1,000 acres within the BAM areawide project that is only treated with Isomate-C+ for codling moth. Moth catch of OBLR was 92% lower in BDAM than BAM orchards during 1999. Catch of codling moth was similar in both sites. In general, moth counts were lower for OBLR in BAM this year and declined 50% in BDAM since 1998. Mean fruit injury by codling moth remained <0.1% in both sites and was lower in BDAM than BAM for the second year in a row. Fruit injury from OBLR increased in both BAM and BDAM orchards from 1998 to 1999. Similar to 1998, fruit injury was 40% lower in BDAM than BAM orchards in 1999. Insecticide use in BDAM and BAM orchards were similar with respect to OP and Success (spinosid) use in the spring and summer. However, BDAM orchards received fewer applications of Bacillus thuringiensis than BAM orchards. In general, insecticide use was reduced in all orchards from 1998 to 1999, perhaps due to the poor economic situation for growers. This reduction in insecticide use probably contributed to the increase in OBLR injury.