T-Y IPM NEWS

news about integrated pest management in Terry and Yoakum counties
Scott A. Russell, EA-IPM
Telephone: (806) 637-4060
Mobile: (806) 893-1041
Fax: (806) 637-2588
E-Mail: sarussel@tamu.edu   http://lubbock.tamu.edu/ipm  
Vol. 3, No. 10
209 South Fifth Street, Brownfield, TX 79316
August 8, 2002

In this issue:
General Situation
Cotton Aphids

General Situation:
Cotton aphids continue to build in most fields. Beneficial lady beetle larvae and lacewing larva are also on the increase. In some places the beneficials are keeping the aphid numbers down at present (the high temperatures may be helping too). Bollworm numbers are increasing again this week. The more lush cotton has had the greatest populations of worms. Fields in the I.P.M. Scouting program ranged from 2,000 to 11,000 bollworms per acre. Last Thursday evening, scattered showers provided much needed rainfall to limited areas. Dryland cotton around Meadow continues doing well, while most other dryland is gone. Cotton that has suffered water stress is shedding the newest bolls in large numbers. Nodes above white flower ranged from 3.5 to 1 this week.

Cotton Aphids:
A few fields are being treated for cotton aphids. Here is a review of the decision making process.

Management and decision making.
Fields should be scouted twice per week since rapid in-creases in aphid numbers can occur in a short time. A total of 60 leaves divided between the top, middle and lower portion of the plant should be sampled from plants across the field to determine actual infestation levels. Insecticidal control of cotton aphids should be delayed until infestations exceed 50 aphids per leaf.. Do not base your treatment decision on the few plants at the end of a row (from the pickup window) as this is not representative of the entire field. Get out and scout across the field sampling in several locations.

Treatment Cost Comparison:
Last week I provided a list of suggested insecticides for aphid control as well as results of a 2000 test in Lubbock County from Extension Agent-I.P.M. Brant Baugh. This week I have compiled an average price per acre for some of the common products and some new ones to consider.

Again we do have the use of Furdan on a Section 18. There does not have to be any failure documentation prior to use, however there are several other factors to consider. All fields treated with Furdan must be posted. Re-entry following application requires protective clothing for 14 days. Only two applications per season are permitted.

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.
The Texas A&M University System, U.S. Department of Agriculture, and the Commissioners Courts of Texas Cooperating
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Several of the newer products have only a 12 hour REI, and the signal word "caution". Bidrin, Centric and Intruder have had very good results in our area. Provado/Trimax can also be very effective.

Product Name Per Acre Rate Average Price per Acre
Bidrin® 8E 8.0 oz. 5.92
Provado® 1.6F 3.75 oz. 22.20
Trimax® 4F 1.0 oz. 5.81
Centric® 40 WG 2.0 oz. 8.42
Intruder® 70WP 1.0 oz. 8.87
Furdan® 4F 8.0 oz. 4.64

These prices are compiled from a telephone survey of five area retailers. Not all products were available from all retailers. Rates listed above are "suggested" rates, some products have good effectiveness at even lower rates as per their labels.

 

Upcoming Event:
50th Annual West Texas
Agricultural Chemical Conference
August 28, at the Lubbock Memorial Civic Center
Registration begins at 7A.M.
C.E.U.'s approved by TDA, CCA, NMDA and OKDA
Contact our office for more details.

 

T-Y IPM News is a publication of the Texas Agricultural Extension Service IPM Program in Terry and Yoakum Counties.

Editor: Scott A. Russell EA-IPM,
Terry & Yoakum Counties

Production: JoAnna Garcia


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