How to Manage Pests

Pests in Gardens and Landscapes


Overwatering leads to lack of oxygen, which causes decay of feeder roots. Despite excessive water, trees may look drought stricken because the uptake of water and nutrients is severely limited.


Soil problems can be minimized by planting walnut trees on deep, well-drained soils. Maintain a good irrigation program. If you use flooding on a heavy, layered soil, adjust your irrigation schedule or change to sprinkler or low-volume irrigation techniques.

Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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