Issue link: https://read.dmtmag.com/i/401644
46 NOVEMBER 2014 GOOD FRUIT GROWER www.goodfruit.com New Stemilt line one of world's longest Cidetrak registered T récé Inc. has received registration from the U.S. Environmental Pro- tection Agency for its new Cidetrak pest management products containing an attractant developed from pear esters. The kairomone attractant, which was developed jointly by Trécé and U.S. Department of Agriculture scientists, is known as DA. Cidetrak DA MEC is designed for tank mixing with insecticides to enhance their efficacy. It causes codling moth larvae to stop for long periods as they make their way from the egg hatch site to the fruit, exposing them to insecticides for much longer periods. Cidetrak CM DA Combo Meso is a solid dispenser containing a mixture of DA and the codling moth pheromone that is used for mating disruption of codling moths. The DA enhances the effect of the pher- omone on male moths and also disrupts females, resulting in less mating and fruit damage. Dispensers are applied at the rel- atively low rate of 32 per acre and have a novel hanger designed to minimize the time needed to hang them. Trécé introduced DA in 2003 in a com- bination lure used for monitoring both male and female codling moth. Cidetrak CM DA Combo Meso New antibiotic labeled T he bactericide Kasumin (kasugamycin hydrochloride) has received broader approv- al from the Environmental Protection Agency for use to control fire blight in apples and pears in the United States. "We have had Kasumin available in Michigan through a Section 18 specific exemption since 2010 in counties impacted by streptomycin resistance in the fire blight pathogen," said Dr. George Sun- din, Michigan State University fruit pathologist. Kasumin now has full section 3 registration with the EPA. "The overall grower experience with this prod- uct has been excellent for fire blight control in orchards with streptomycin resistance, and Mich- igan State University extension field trials con- tinue to show excellent efficacy for blossom blight control," Sundin said. Kasumin, a product of Arysta LifeScience, was labeled for use in Canada nearly two years ago. There, it is labeled for control of some bacterial diseases on vegetable crops as well as fire blight on pome fruits. In Michigan, the registration means all growers can use the product, and it can be used on pears as well as apples. "There is no longer a requirement for state experts to indicate potential epidemic conditions for fire blight prior to an application," Sundin said. "However, I strongly suggest that growers continue to use the fire blight disease prediction model available on the MSU Enviro-weather website and only apply Kasumin when predicted EIP (epiphytic infection potential) values are 100 or greater." The new Section 3 label says that Kasumin is not to be used in orchards in which the soil has been fertilized with animal manure. It may not be applied after petal fall. A maximum of four appli- cations can be made. Do not use alternate row applications. The use rate is 2 quarts per acre applied in 100 gallons of water. Reduced spray volumes can be used for smaller trees. The pre-harvest interval is 90 days. "I strongly suggest not applying more than three applications per season for resistance management purposes," Sundin said. "We must always remain cognizant of how we got this mate- rial in the first place. The occurrence of streptomy- cin resistance in the 1990s in southwest Michigan and in the 2000s in the Fruit Ridge area and pro- gressing northward has had severe impacts on the industry." Sundin said that during winter and early spring throughout the state he would be outlining use strategies and resistance management options leading into next season. —R. Lehnert A selection of the latest products and services for tree fruit and grape growers. GOOD STUFF "I strongly suggest not applying more than three applications per season for resistance management purposes." —Dr. George Sundin Stemilt's new apple sorting and sizing line. S temilt Growers in Wenatchee, Washington, has installed a new apple sorting and sizing line at its Old Station plant. With 76 drop points, it is one of the longest apple sizers in the world, giving the company the flexibility to pack multiple sizes and grades. The Greefa technology features electronic color sorting and external defect sorting, with the ability to detect russet, hail, and bruising. It can also assess the internal quality of the fruit. It can assess the Brix level and detect apples with heavy watercore or internal browning. The new equipment is designed to reduce labor costs as well as ensure the consistency and quality of the pack.