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
Wednesday, 14 May 2014: Petal fall is a really critical time for apple disease control. Trees are rapidly generating new disease-susceptible terminal leaves, and fruitlets are at peak susceptibility for infection by fungi causing scab, rust, blossom-end rots, moldy core, … Continue reading
Monday afternoon, May 12, 2014: According to the best apple scab models, major ascospore discharges and infection periods occurred April 29-May 2 and again May 8-11. If current weather forecasts are accurate, we will experience the third really major apple … Continue reading
Monday afternoon, May 12, 2014: Warm weather and predicted showers continue to favor fire blight. A strep spray should have been applied sometime on Saturday or Sunday to all orchards that are at high risk for fire blight (i.e., trees … Continue reading
Thursday, 8 May, 2014: The fungi causing brown rot blossom blight invade stone fruit flowers during wet weather when stone fruits are in bloom. A modest fungicide program is usually sufficient to protect stone fruit flowers, but under unusually favorable … Continue reading
Thursday noon, May 8, 2014: With apples and pears in bloom and several days of intermittent rainfall, many folks are probably wondering about the risk of fire blight. I just finished running the MaryBlyt model using weather data from the Highland-HVL … Continue reading
Tuesday, May 6, 2014: In the Hudson Valley and southern New England, the time when sweet cherries are blooming is a critical time for managing X-disease. During cherry bloom, seedling Mazzard cherry trees growing in hedgerows and woodlots adjacent to stone … Continue reading
Monday, 5 May, 2014: Several recently published studies have reported that some fungicides may interact with other agrochemicals in ways that make them harmful to bees. Initial reports were sketchy. In their May 1st issue, Good Fruit Grower published a short … Continue reading
Thursday morning, May 1, 2014: Rains over the past two days exceeded 2 inches and have almost certainly removed all protection from fungicides that were applied prior to the rain. Orchards that were sprayed after Saturday morning of last week … Continue reading
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