jmcextman

Out and about in the UMass Cold Spring Orchard...

Sunday, March 28, 2021

Fungicide alphabet soup - time to pour it down the drain!

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I have a love-hate relationship with tree fruit plant pathologists. LOVE, because diseases -- apple scab, fire blight, brown rot, etc., you ...
Wednesday, November 25, 2020

Weather Data Source and Apple Scab DSS Model Output – Does it Make a Difference?

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 Jon Clements (UMass Extension) and Daniel Cooley (Stockbridge School of Agriculture) Weather data source, the location of a station, and DS...

Comparing the Malusim app to the ‘Schwallier’ and ‘Ferri’ XLS spreadsheet versions of the fruitlet growth rate model in 2020 to predict fruit set in Gala, Honeycrisp, and Pazazz® apples

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INTRODUCTION Chemical thinning sprays are the most trying and most important decisions an apple orchardist can make. Factors that influence ...
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Thursday, October 22, 2020

Marssonina blotch

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R ecently I visited a block of EverCrisp apple trees in an orchard in the hilltowns of western Massachusetts west of the Connecticut River....
Saturday, April 11, 2020

2015 Modi Organic NC-140 Apple Rootstock Trial and Drapenet Demonstration

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Blogger note:waiting too long for this to appear in Fruit Notes/Horticultural News. Sorry Wes and Win... Jon Clements, Elizabeth Garofalo,...
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Friday, March 20, 2020

Improvements to MaluSim (Cornell Apple Carbohydrate Thinning Model)

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I n the most recent Fruit Quarterly (Vol. 28, No. 1, Spring 2020) Dr. Terence Robinson and co-authors introduce some improvements to the C...
Sunday, October 20, 2019

"Adventures" in apple thinning in 2019

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Is it just me or is it every time I think I chemically thinned apples adequately, come July, it’s like where the heck did all those apples ...
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About Me

Jon Clements
Belchertown, MA, United States
Extension Educator, Tree Fruit UMass Amherst jmcextman@gmail.com
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