Walnut Pruning Trial – Update and Field Day

A study evaluating central leader training, minimal pruning of walnuts in comparison to traditionally trained walnuts has been ongoing within Merced County for the past six years. Over this period, the unheaded, minimally pruned ‘Chandler’ trees have cumulatively out-yielded the headed, or traditionally pruned, walnuts by an estimated 1500 lbs/acre over the first four harvests […]

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Alternaria leaf spot of almond

The late rains we are receiving will increase the risk of Alternaria. This pathogen (Alternaria alternata) requires warm temperatures and leaf wetness to infect almond trees. A few weeks after infection, small circular lesions form, eventually increasing to the diameter of 1/2-3/4.” Occasionally, there is a yellow halo. Older lesions often develop a black ring of […]

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Yellow Trees from Being Too Wet

It is very common to see yellow trees in the spring. The lack of color is often due to saturated soils which reduces the movement of oxygen into the soil, killing fine feeder roots. This impacts the ability for the tree to take in water and nutrients, leading to micro-nutrient deficiencies, impacting nut set and […]

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