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| Volume
XXVII No. 7 |
April
13, 2001
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GENERAL SITUATION: Continued hot, dry and windy. No rain
since early February has all of the area crops needing moisture.
Some irrigation of crops has commenced and will likely increase
if significant rain does not fall quickly. Dryland farms were still
holding their own, but just barely. Most cotton appeared to be "ok"
this week. Without rain, that could change rapidly. Grain and corn
crops need moisture more so than cotton. Increasing grain leaf twisting
was observed this week indicating a continual loss of yield potential
in those field situations. Insect activity was light this week.
Pheromone traps
caught significantly less weevils this week than in the last several
weeks. Many traps had zero counts compared to over 10 per day over
last week's counts. We changed the scale of the attached graphs
from 10 to five so that the graphs should be easier to read. Increasing
numbers of cotton fields with squaring cotton and the very windy
days over the last 10 days probably accounted for most of the drop
in trapped weevils. Some early planted cotton fields had as many
as 3 squares per plant. Most cotton was in the 4 to 6 true leaf
stage and will likely have visible squares next week. The fewer
weevils caught in traps does not mean that weevils are not around
the area, only that they cannot fly as well in the high winds as
they can when the wind speed is only 10 to 15 miles per hour versus
30 to 50 miles per hour. Keep monitoring traps and fields, even
if there is not a history of early boll weevil infestations. Every
year is different and the weevils may show up some place they normally
do not. Be cautious.
Cabbage loopers
were noted in many fields around the LRGV this week. Parts of a
few fields in the Willacy county area had leaf damage on every plant.
Otherwise, loopers were not reported as heavy in most area field.
Larval counts were scattered with numbers ranging from 0 in many
fields to 20 or more per 100 plants. Larvae sizes ranged from 1/4
to 3/4 inches in length. Normally, loopers at this time of the season
do not cause any economic damage. But, like every other potential
cotton pest, loopers should be monitored to make certain that they
do not start causing terminal losses or major leaf damage that could
inhibit normal plant maturation.
Aphids and
cotton fleahoppers were in very light numbers in fields scouted
this week. No reports of heavy aphids and only light infestations
of fleahoppers were received.
Beet armyworms
were again reported, but only in scattered locations. Only a few
"hits" were reported and larval counts from those hits
were lowonly 2 to 3 larvae per hit reported when they were
found. Keep scouting.
Some
fields were showing heads and a few were actually showing a few
blooms this week. Insect activity was all but non-existent as is
usually the case with the early sorghum plantings. Sorghum planted
after March 10 can often be the sorghum with economic levels of
midge which usually appear in fields about the end of May.
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