Issue link: http://read.dmtmag.com/i/298602
www.goodfruit.com GOOD FRUIT GROWER MAY 1, 2014 15 Introducing GRANDEVO ® , a unique, broad-spectrum, biological insecticide/miticide. You've got tough pest management challenges. GRANDEVO meets them head on with a dynamic new approach. It controls today's worst sucking and chewing pests – with complex modes of action that enhance resistance management. Added up, it's a breakthrough unlike anything you've ever seen. It's a breakthrough in pest control. There's no getting around that. Changing pest management. www.marronebio.com/grandevo Always read and follow label directions. ©2014 Marrone Bio Innovations, Inc. All rights reserved. Grandevo, the Grandevo logo, Marrone Bio Innovations, and the Marrone Bio Innovations logo are trademarks or registered trademarks of Marrone Bio Innovations, Inc. U.S. Patent No. 7,244,607. Additional patents pending. 22383 REV-02/14 GFG Broad spectrum control. Complex modes of action. Application fl exibility. Go to www.marronebio.com/grandevo for more. So, if the release period can be cut in half, and the number of releases per hour can be cut in half, and the amount of pheromone dispensed cut in half, the total pheromone used is one-eighth the standard amount. McGhee found that the aerosol dispensers, which were tested against the rope, or twist tie, dispensers, were equally effective—something he and Gut had tried for several years to demonstrate. He also found that two aerosol dispensers per acre was adequate, giving 94 to 96 percent suppression of codling moth. "One dispenser gets you pretty close, 88 to 90 percent," he said. The standard amount of pheromone loading is 70 grams in a canister, and it lasts season long but only one season. If the amount in each canister could be reduced to nine or ten grams, that would be a huge savings in the cost of pheromone needed to fill a canister. McGhee and Gut believe that growers can get by using only mating disruption when moth populations are low. And, given good insecticides, they can get by with very few selected insecticide applications when populations are higher. Mating disruption, monitoring with traps, and timely use of selective insecticides provide a stable three-legged stool that should lower the cost of codling moth control and remain a viable approach into a distant future. • Sterile male moths can be identified in traps by their pink color when squashed (from the dye in their diet) and/or by being dusted with color, as these were. Trap captures indicate mating disruption failures—since the male moth was able to find the trap emitting the odor of female pheromone. Aerosol emitters are easier for orchardists since it takes many fewer per acre. Since they are more expensive, McGhee's work has been to find out how many are needed and how much pheromone they must emit, and how often. PHOTOS COURTESY OF PETER MCGHEE