In almonds in the Sacramento Valley, here are 4 things to put on your list for May…
#1. Monitor diseases
Continue leaf monitoring for alternaria leaf spot, shot hole, rust, scab and anthracnose if rainy weather persists. Consider a follow up rust treatment before symptoms are visible if orchard history and conditions indicate high vulnerability. Rotate the material’s site of action (FRAC Group) to avoid development of pesticide resistance.
#2. Scout for insects
Continue watching for PTB or OFM shoot strikes in first leaf orchards. Once sufficient growth for primary scaffold extension has occurred, this is no longer a concern.
#3. Check for mites
Monitor for spider mites and their predators (especially six-spotted thrips and predaceous mites) at least weekly, watching hot spot areas that are often dusty or water-stressed. Here’s more on treatment decisions.
#4. Survey weeds
Determine and record which weeds were not controlled by fall or winter treatment.