Navel Orangeworm (NOW)
Was damage higher than
expected
?
Were field samples
collected and cracked out
?
The damage reported from the
processor is often 50 percent
less than what was experienced
within the field. This is due to
the harvesting process and that
damage percentage is measured by
weight, not count, at the processor.
Remember, every one percent of
damage is 25 pounds per acre if
averaging a 2,500 pound per acre
crop. If damage was high, were
the trees winter sanitized
?
Mummy
nuts serve as the only food source
for NOW between last year’s and
this year’s crop. Was a hull split
spray applied
?
Which material
and at what volume
?
What type
and how fast was the rig speed
?
If
this is unknown, better notes should
be taken.
Stick Tights
Are there more than expected
?
Does one variety have more stuck
nuts than the other
?
If so, what
symptoms are observed
?
The
protracted bloom experienced in
February of 2018 often leads to
a delayed harvest timing, leading
to reduced nut removal. Gumming
can occur with hull rot, boron
toxicity, or diseases such as anthracnose or bacterial
spot. Dead shoots often are due to hull rot. Stick tights
could also be due to uneven ripening from a protracted
bloom (common in self-pollinating varieties), poor shake
timing, or incorrect water management. Sanitizing these
mummies will need to occur to reduce NOW pressure
the following season.
Weeds
What weeds presented a challenge to manage this past
year
?
Were applications of glyphosate or glufosinate
ineffective due to resistance or lack of activity on weed
spectrum
?
Are these weeds beginning to spread across the
field
?
Even more concerning, is there a new weed problem
emerging
?
The weeds present and issues experienced will
help with post and pre-emergent selection, timing, and rates.
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