Potassium Webinar Q&A

Posted by Franz Niederholzer  /   April 11, 2014  /   Posted in Almond, Nutrient Management  /   No Comments

At the end of February, David Doll and I presented a webinar on potassium nutrition of almond orchards hosted by Western Farm Press with support from Compass Minerals.  During the webinar, listeners asked questions and we tried to answer them at the end of the webinar.  We could only get through a few.  In this post, we try to answer at least a few of those questions asked (another link to the webinar…click here!). Read More

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Jacket Rot on Almond

Posted by David Doll  /   April 11, 2014  /   Posted in Almond  /   No Comments
Jacket Rot of Monterey appeared to be caused by Botrytis.

Jacket Rot of Monterey appeared to be caused by Botrytis.

I have been receiving a few calls about issues with deformed almonds, particularly with the variety of Monterey. When looking at the nuts, it appears that the damage is associated with the jacket. This appears to be jacket rot. Samples submitted were placed in a humidity chamber and produced the gray/brown “fuzz” that is common to Botrytis, one of the causal agents of jacket rot.

Based on the weather, this appears to be an issue with the four day rain event that occurred as the jackets were splitting on the later blooming varieties. I dont suspect a major problem, unless we re-enter a period of rainy, cool weather.

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Leaf Spot on Padre, Other Varieties

Posted by David Doll  /   April 03, 2014  /   Posted in Almond  /   6 Comments

Odd leaf symptoms on several different varieties have been reported across the valley. Predominantly found on Padre, they are found on the edge or the tip of the leaf. The lesions can be quite large, but tend to have a watersoaked margin and a yellow halo. In other varieties, the lesion has a shot-hole-like appearance, but fruiting bodies are not visible. Farmers have complained that fungicide spray programs have not been effective in controlling this disease. Read More

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Well Water Analysis to ID Salinity Issues

Posted by David Doll  /   March 24, 2014  /   Posted in Almond  /   2 Comments

There will be an increase reliance on groundwater for 2014. Wells that have been typically relied on to subsidize water allocations are now providing the primary source of water for the drought stricken almond orchards. If using a well, it is important to sample the water. Sampling will determine the characteristics of the water such as dissolved salts, pH, and major cations and anions. Sampling should be performed regularly, and more frequently if well performance or pumping depth has changed.  Read More

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