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P.O. Box 318 |
Hillsboro,
TX 76645
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June
6, 2001 Vol. VI No. 7 Hill-McLennan Counties Web Site: entowww.tamu.edu E-mail: m-jungman@tamu.edu |
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GENERAL SITUATION The moisture conditions will range from dry to wet. Most of the area is in dire need of a rainfall with the exception of Honey Flats. Corn will range from 3 feet tall to roasting ear. The majority of the corn will vary from 1 week to tasseling -to-completely tasseled out. Grain sorghum will vary from 8 inches tall to just past bloom and starting to seed. The majority will range from just prior to boot to bloom. Cotton growth stage will range from cotyledon to 1 week to bloom. Most of the cotton will vary from 5 true leaves to match-head square. At this time last year (June 3 & 4) we had 4-11 inches of rain with most of the area receiving 6-9 inches. In a newsletter on June 8, 2000 corn was in the roasting ear stage. The majority of the milo was in bloom or just past bloom. Most of the cotton ranged from match-head to just past 1/3 grown square. CORN and GRAIN SORGHUM Greenbug levels
are very light. |
Corn leaf aphids are in light to moderate numbers in the whorls of milo. This aphid is not considered an economic problem. Sorghum midge are not being seen in area grain sorghum fields that are blooming. Grasshoppers
continue to cause problems in area corn and grain sorghum fields next
to pastures. Lorsban® appears to be the most effective insecticide
for this pest. A rate of 1 to1-1/4 pints should achieve adequate control.
As grasshoppers increase in size the rate will need to be increased. Insecticide
applications with good coverage will achieve greater control. *********************************************** Producers that are planning or considering silaging corn should be very careful on what foliar insecticides they use for grasshoppers, etc. and the number of days to harvest. *********************************************** COTTON In general, cotton continues to grow off well. Percent square sets are generally less than desirable. Most fields will range from 50-75%. |
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Thrips continue to cause problems to younger or later planted cotton. Thrip numbers and damage will range from moderate to heavy. Cotton aphids in general are light but we are seeing a slight increase. There are a few fields with moderate numbers and some cupping of leaves. Fleahopper numbers will range from 2-80 per 100 terminals. Most fields will range from 10-46 per 100 terminals. Fleahoppers continue to cause problems to cotton that is squaring. Numbers may be higher 3-4 days after insecticide applications due to adult migration. Most fields have required 2 insecticide applications for this pest to achieve adequate control. The less advanced cotton that has just begun to square or pre-squaring may require 1-2 insecticide applications for fleahoppers after the June 8 cut-off date. Spraying after this date may cause bollworm problems particularly to non-Bt cotton. Lygus bug numbers are light and will range from 0-4 per 100 plants. Bollworm egg counts will range from 0-5 per 100 plants. Bollworm larvae counts will range from 0-4 per 100 plants. Bollworm/budworm trap counts indicate a higher percentage of bollworm moths at two locations. The Malone location indicates a higher percentage of budworm moths. Overwintered boll weevil trap counts continue to be light. Producers should try to discontinue insecticide use on or before June 8 and start to build up beneficial insect numbers. OVERWINTERING
BOLL WEEVIL
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Bollworm/Budworm
Moth Trap Catches
(Number of moths per trap) * Bollworm and budworm moth trap counts are not indicative of the number of moths out in the field. The trap counts are used as a monitoring tool to determine the percent bollworm and percent budworm in the area. Beet armyworms trap counts are light. We are not seeing beet armyworm larvae in cotton fields. BEET ARMYWORM TRAP COUNT
(The cumulative average of two traps/week. Trap location is in the Chatt area.)
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*********************************************************************************************************************************************************** Educational programs conducted by the Texas Agricultural Extension Service serve people of all ages regardless of socioeconomic level, race, color, sex, religion, handicap or national origin. The information given herein is for educational purposes only. References to commercial products or trade names is made with the understanding that no discrimination is intended and no endorsement by the Cooperative Extension Service is implied. ___________________________________________________________________________________________________________
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