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Lecanium scale numbers building on chestnuts
Chestnut growers in some areas of Michigan are experiencing high levels of Lecanium scale infestation. Growers with young, susceptible trees should be particularly diligent in scouting for this pest.
Michigan chestnut update—July 9, 2014
Potato leafhopper populations are building and the first reports of Japanese beetles are coming in from southeastern Michigan. Growers should be aware of potential damage from these pests.
Michigan hop update – July 8, 2014
Growers should be on the lookout for increasing potato leafhopper populations and Japanese beetles, as well as continue scouting for downy mildew.
Rose chafer has arrived in northern chestnut orchards
Rose chafers have been seen throughout the chestnut producing regions of Michigan. Growers should consider that mature trees can sustain a substantial amount of feeding before any negative impacts are realized and be conservative with chemical treatments.
Downy mildew pressure is high in northern Michigan hopyards
With ample rain, warm temperatures and high humidity, hop growers should be diligent in applying protectant fungicide applications against downy mildew.
Potato leafhoppers reported on chestnuts in Ingham County
Not surprisingly, potato leafhoppers have arrived in Michigan chestnut orchards. Growers should be scouting for and treating against this key pest of edible chestnuts.
Michigan chestnut update—June 10, 2014
Rose chafer has arrived in orchards and are easily visible feeding on foliage. Growers should carefully weigh the pros and cons of treatment. Caterpillars are feeding on leaves and potato leafhopper has been reported, though not yet observed on chestnut.
Michigan hop update – June 6, 2014
Growers should be scouting for downy mildew, two-spotted spider mites and potato leafhopper this week. MSU Extension will be tracking hop development this season and providing growers with relevant pest management information.
Updated registered pesticide list for chestnut producers for 2014
New pesticide quick reference available for Michigan chestnut growers through Michigan State University Extension.
Downy mildew of hops already reported in Michigan for 2014
As the first hop bines emerge, growers are already reporting symptoms of downy mildew infection. Early and consistent protectant spray strategies will be critical to season-long control of this difficult disease.