RIMpro is a proprietary interactive decision support system that can help fruit growers manage apple scab and fire blight in spring. I discussed RIMpro briefly in a blog post last year. I have evaluated RIMpro for three years and have … Continue reading
The predicted scab infection risk for April 1-3 has diminished somewhat, but caution is still advised. Below are the RIMpro graphs for the two systems that I described in a post yesterday morning that was titled “Weather or Not.” The RIM … Continue reading
The first scab infection period of the year may occur later this week in the Hudson Valley, but the probabilities of that happening depend on which weather forecast you prefer to believe. The weather variable is the critical factor regardless … Continue reading
Rains today (March 10th) pose no threat for apple scab in the Hudson Valley because we still do not have any green tissue on apples buds. According to one degree-day model*, McIntosh can be expected to reach the green tip bud … Continue reading
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
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
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
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
Sunday evening, April 27: Weather forecasts for the coming week vary, but at least one of the forecasts is suggesting that we may have more than 3 inches of rain in the Hudson Valley between Tuesday morning and Thursday evening. … Continue reading
3 PM, Mon, 14 April: My previous message on apple scab ascospore assessments contained some confusing language as it relates to the ascospore maturity model on the NEWA website. In that posting, I stated “the NEWA model is predicting actual spore … Continue reading
Noon, Mon, April 14: Early-season apple cultivars at the Hudson Valley Lab reached the green tip bud stage (50% of fruiting buds showing green tip) on Sunday, April 13. Temperatures over the past three days were 5 to 8 degrees … Continue reading
2 pm Fri, April 11: Leaves collected this morning from an abandoned orchard just north of the Hudson Valley Lab showed a wide variation of ascospore maturity with most pseudothecia of the dozen examined still showing little or no … Continue reading
Fri, 4 April scab maturity assessment: Today Mike Biltonen (Apple Leaf Consulting) and I collaborated on an apple scab maturity assessment and found no apple scab ascospores that were anywhere close to being mature. Not surprising given the fact that … Continue reading
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