New fungicides benefit from LESSONS OF BENLATE

摘要

Fruit growers will have new fungicides this year to help manage diseases as diverse as leaf spot in cherries, scab in apples, and brown rot and scab on peaches. The new materials are so-called second-generation succinate dehydrogenase inhibitors (SDHI), similar in action to boscalid, one of the components of Pristine (the first in this new generation, registered in 2003), and they are being sold in a similar manner. They come in packaged premixtures, in which the new SDHI component is combined with an older fungicide with a different Fungicide Resistance Action Committee (FRAC) code and different mode of action. These premixtures are designed to prevent development of resistant disease organisms, which can and do destroy the value of good fungicides, Dr. George Sundin, Michigan State University plant pathologist, explained during the Great Lakes Fruit, Vegetable, and Farm Market Expo in Grand Rapids, Michigan, in December.