We found the first mature apple scab ascospores this afternoon, 7 March 2016. It appears that we may need to be ready for a really fast start to the scab season in 2016. Dan Donahue, extension educator for the Eastern … Continue reading
RIMpro contains a proprietary apple scab model that is useful for (i) identifying the start of the scab season, (ii) quantifying risks associated with key infection periods between green tip and first cover, and (iii) determining the end of the … Continue reading
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Many of the apple cultivars desired for making hard cider are currently in short supply, a fact that has resulted in high prices for fruit of some especially desirable cultivars. Apple growers interested in producing cider apples may wish to … Continue reading
Crimson Topaz is a scab-resistant cultivar from Europe that has been gaining in popularity because of its attractive appearance and good eating quality. However, we are learning that this cultivar is rather susceptible to several diseases that cause cankers on … Continue reading
Monday, 28 July: The few remaining weeks before apple harvest begins provide an ideal time for cleaning and sanitizing apple storage rooms. All storage rooms should be swept clean and washed out with water to remove any dirt and debris on … Continue reading
Friday, 4 July 2014: Storms over the past three days have provided >4 inches of rain throughout much of the Hudson Valley, and those rains may trigger major disease-control problems in orchards where early-season disease control was less than 100% … Continue reading
Monday, 30 June 2014: In case you missed them, I recently published two articles in Scaffolds Fruit Journal that I will not duplicate here. The article last week (23 June) was titled “Controlling Summer Diseases on Apples” and focused on spray … Continue reading
24 June 2014: As noted in my last post 10 days ago, fire blight is apparently pretty easy to find in the Hudson Valley this year. Several people have told me that younger trees that were protected with streptomycin sprays … Continue reading
14 June 2014: Fire blight is causing problems across a broad swath of the mid-Atlantic and Northeast. Dealing with fire blight at this time of year is always difficult. Penn State Extension just published an excellent article by Dr. Kari … Continue reading
Thursday, 29 May 2014: Despite my dire predictions in earlier blog posts, apple scab has been very slow to appear in the Hudson Valley this year. Severity of anticipated infection periods in mid-April was diminished when temperatures ended up being … Continue reading
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Wednesday, 28 May 2014: The first fire blight symptoms are now appearing in Hudson Valley orchards. Dying blossom clusters or shoots noted while spraying orchards should be investigated carefully to determine if fire blight is causing the die-back. Early evidence … Continue reading
7 pm, Thursday, May 22, 2014: Unfortunately, some regions of the Hudson Valley received hail within the last 12 hours. Where fire blight inoculum exists in apple and pear orchards, injuries to bark, leaves, and fruitets may provide entry points … Continue reading
Tuesday afternoon, May 20, 2014: Weather forecasters have adjusted their predictions, and the slightly cooler temperatures predicted have resulted in reduced risks for additional fire blight infections later this week. The potential infection periods that were predicted yesterday disappeared when … Continue reading
Friday, May 16, 2014: The current weather pattern is generating high risk for a number of apple diseases: Fire blight risks have been very high through much of the last week. I have not gone back through our historical records, … Continue reading
Friday, May 16, 2014: Our warm, humid, misty, wet weather is providing excellent infection conditions for bacterial spot of stone fruits. (Our current weather also favors brown rot infection, but you already knew that!) Bacterial spot can destroy peaches, nectarines, apricots, … Continue reading
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