Issue link: https://read.dmtmag.com/i/110873
Pest Management photos by alan knight Serving Agriculture Since 1933 FIGURE 2. Zorro trap for spotted wing drosophila. injury, but was actually caused by eye-spotted bud moth. False positives (traps catch moths but no larvae or injury was detected) also occurred. These instances were due to the presence of adjacent cherry orchards or other known nearby infested hosts. False positives occurred more frequently in the second half of the season as moth populations dispersed more widely from these sites. The catch of leafroller adults, especially females, emigrating from other sites clearly poses a risk to orchards, and these catches can be an important alert to the farm manager. Ajar trap for oriental fruit moth The Ajar trap uses a standard terpinyl acetate plus brown sugar bait as the attractant but not as the catching medium. Instead, the jar of bait is placed inside the delta trap and a sticky liner, like the one used in a standard delta trap (Figure 1), is used to catch moths. The trap has been tested in Europe and South America as well as in orchards on both coasts of the United States. The Ajar trap performs as well as bait-filled bucket traps, catching both sexes of moths and 150 times more total moths than a sex-pheromone-baited trap in one mating-disruptiontreated peach orchard in Argentina. Host plant volatiles, such as beta ocimene or beta farnesene, have been added to further increase moth catches. The use of an exclusion screen to eliminate the catch of nontarget moths and hymenopterans and reduce the catch of flies has been developed. These traps will be more fully evaluated by growers in California in 2013. Zorro trap for spotted wing drosophila Cherry growers unfortunately rediscovered the wrath of this little fly in 2013. Traps are needed to delineate its geographical distribution and seasonal dynamics in our area. An array of traps is likely needed within and surrounding potential hosts such as cherry and blueberry. Studies are in progress by Dr. Peter Landolt with USDA, Yakima, to develop a more selective lure. Meanwhile, the apple cider vinegar bait works, often too well, with from zero to thousands of flies caught per season per trap. Growers urgently need a standardized approach to track this pest in its new home. We discovered that flies are strongly attracted to an alternating set of red and black strips. A standard 8-ounce spice bottle was dressed with these colors to become the Zorro trap (Figure 2). The Zorro trap does not catch more flies than all traps tested. But, its simple and effective design offers an opportunity for growers to adopt a standard approach to fight this insidious despoiler of ripening fruit. ��� www.goodfruit.com Quality Firman Pollen Improves: -Fruit Set -Bee Efficiency -Pollination Timing Quality Pollination Improves: -Yield Consistency -Fruit Quality -Fruit Storability Trust Quality Firman Pollen -Viability and Virus Tested -Compatibility Matched -Leaders in Application Technology Exclusive distributor of Scumby Puffers�� Area Representatives: Washington: Columbia Basin and Yakima Valley Randy Bunce 509.452.8063 randy@firmanpollen.com Wenatchee/Okanogan area Tom, Kyle, & Linda Batch 509.687.9670 Bleyhl Farm Service Grandview: 509.882.1225 Zillah: 509.829.6922 California Linden John DeMartini 209.484.8502 Tulare & Kern Counties Bob Cademartori 209.601.0754 Serving Agriculture Since 1933 Serving Agriculture Since Apple, Pear, Cherry, Plum, Apricot 301 N. 1st Avenue Yakima, WA 98902 (t) 509.452.8063 (f) 509.453.6838 1.800.322.8852 www.firmanpollen.com GOOD FRUIT GROWER MARCH 1, 2013 33