Understanding insecticide modes of action may not be easy but following the IRAC MoA Classification for resistance management is as simple as rotating the numbers.
After a dry April, rain has crept into the forecast making conditions ideal for apple scab, fire blight, and cherry leaf spot. Other diseases to keep an eye for management are powdery mildew and bacterial spot. For those who had their stone fruit crop frozen out in April, disease management is still needed. Disease infection periods are being posted for regions in Pennsylvania and Maryland.
After an early beginning to the growing season that saw green tip stage reached on average about 18 days ahead of last year, the weather cooled off and for stations reporting full bloom as of the morning of April 30, they are only 11 to 12 days ahead of last year. Obviously frost damage to flowers and spur leaves will be a compounding factor in deciding whether and when to thin this year.
The spring weather, and its impact on the development of insects, continues to be a roller coaster ride. The Oriental fruit moth biofix (first sustained moth flights for the season) was established on April 12, the second earliest date on record.
Boron is one of the essential micronutrients for tree fruit. It helps in the fruit setting process by facilitating pollen development and subsequent pollen tube growth.
Many of you are replacing older orchards with newer varieties and newer training systems. One of the systems that is currently in vogue is the Tall Spindle System (TSS). It was proposed and developed largely by Terence Robinson at Cornell University. Its popularity is due to the simplicity of its pruning.
We have been working with the Tall Spindle System (TSS) since 2008 with Jonagold/B9 and Daybreak Fuji/M.9 T337. We also have a planting established in 2010 with Aztec Fuji as an NC-140 uniform rootstock trial. In 2014 we established another NC-140 trial with Honeycrisp and Aztec Fuji on 7 and 6 rootstocks respectively.
Strawberries are blooming, the rain is falling and it’s warming into the 60’s and 70’s—and as a plant pathologist, all I see is Botrytis spores dancing about the farm. We have already started to see Botrytis popping up on stem tissue and flower petals. Scouting for the pathogen in your fields will help inform you whether you need to spray.
Mike Basedow recently joined Penn State Extension in Adams County as an Extension Tree Fruit Assistant.
The Orchard Spray Record-Keeping Spreadsheet for 2016 has been updated and is available online.
As spring takes hold across the state and country, research and outreach efforts at the University are continuing to combat the decline of bees and other pollinators in an effort to safeguard our environment and the agriculture industry in Pennsylvania and around the world. This issue includes stories on faculty and student pollinator research, features ongoing work at Penn State to assist bees and other pollinators, and provides tips on how everyone can get involved and support pollinator health.
Unusually warm weather in March, despite relatively colder conditions in early April, pushed the development of most insect pests well ahead of a routine timetable.
At this May 20th workshop, Participants will learn to identify major pollinators in tree fruit, including native bee species, and will be given an overview of Integrated Crop Pollination.
Spotted wing drosophila, or Drosophila suzukii, lays eggs in such valuable soft-skinned fruit as raspberries, blackberries, blueberries, strawberries and cherries. The eggs develop into larvae, leaving the fruit unmarketable.
Spring has arrived, but it sure doesn’t feel like it in many parts of the Northeastern U.S. However, the cool weather is buying us some extra time that can be used to review our pre-bloom disease management plans and familiarize ourselves with all the tools at our disposal.
Following an unseasonably warm month of March, a pair of cold fronts brought cold temperatures across much of the eastern United States in early April 2016. The cold weather was stressful, both for the fruit grower and the flowers!
We are seeing indications that the numbers of green fruitworms and rosy apple aphids will be high this season. Both pests tend to flare in a cool, wet spring due to suppression of predators and other biocontrols.
In a previous article, I had mentioned Closer (sulfoxaflor) insecticide as being registered for use on strawberries. It had been for a while, but last fall EPA issued a cancellation order for the product, after the federal Ninth Circuit Court of Appeals found that EPA improperly approved the registration.
Last month, we discussed new herbicides that have become available for use on berry crops in the last few years. In this article, we’ll cover changes with insecticides and miticides.
In light of the cold temperatures experienced recently, a call to your crop insurance agent may be in order. If you believe the recent low temperatures may have damaged your crop you have 72 hours to report the event to your insurance provider.