Texas Agricultural Extension Service
The Texas A&M University System
Jones Mitchell
Nolan
Scurry
Stephen Biles
Extension Agent - IPM
P.O. Box 558
Sweetwater, TX 79556
Office: (915) 236-9011
Fax: (915) 236-9018
e-mail: biles-sp@tamu.edu
Website: http://nolan-ext.tamu.edu/ipm
Vol. 4, No. 9
THE INTEGRATED PEST MANAGEMENT NEWSLETTER
FOR THE LOWER ROLLING PLAINS
July 19, 2001
Cotton Conditions

Hot and dry conditions continue to prevail across the area and some fields are beginning to wilt in the afternoon. The cotton fields range from squaring to mid-bloom to near cutout. Rainfall continues to be the major limiting factor.

Cotton Fleahoppers are not really an issue anymore. Nearly all fields have sufficient numbers of squares per plant to be past the damage window for this pest.

Bollworm eggs and some small worms are being found (0-16 eggs per 100 plants and 0-12.5 worms per 100 plants). Again, give the beneficial insects a few days to see if they will providing adequate control.

More budworm moths are beginning to be captured which might indicate that pyrethroid insecticides may be less useful if control of worms is needed.

Table 1. Moth Trap Captures for July, 2001
(Moths/day).
County
Bollworm
Budworm
Jones
2.5
0
Mitchell
14
0
Nolan
38.8
10.8
Scurry
1.7
0.7
     

 

Turn Row Meetings

July 23 U. A. P. - Roscoe

July 24 Colorado City Co-op Gin

July 25 Doug Foster Farm - West side of C.R. 4153 1 mile North of Inadale

July 26 Randall Brigham Farm - East side of Hwy. 277 1.5 miles North of F.M. 1636

All meetings will begin at 8:30 a.m.
1 hour CEU in IPM will be available at all meetings.

Urban Pests

Crickets seem to be coming earlier this year. Typically we will not see crickets in large numbers for another month of two. But I have noticed them in the mornings around places that have bright lights at night.

There are several insecticides, including pyrethroids, that will control crickets once they are there. However, he best way to avoid a problem is to reduce the amount of outside lighting.

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. We will seek to provice reasonable accomodations for all persons with disabilites for all extension programs. We request that you contact Mr. Stephen Biles (915/236-9011) as soon as possible to advise us of the auxiliary aid or service that your require.

___________________________________________________________________________________________________________

The Texas A&M University System, U.S. Department of Agriculture, and the Commissioners Courts of Texas Cooperating

1

 

Table 2. Heat Units Accumulated from
Selected Dates Through July 17, 2001
From
Thru
Heat Units Accumulated
5/01
7/17
1,528
5/10
7/17
1,416
5/20
7/17
1,229.5
5/31
7/17
1,084
6/10
7/17
910.5
6/20
7/17
673
6/30
7/17
479
Table 3. Accumulated Heat Units Required for Different Stages of Cotton
Growth Stage
From Emergence
From Previous Stage
1st True Leaf
16
16
Pin-head Square
455
439
Match-head Square
560
105
1/3 Grown Square
770
210
First Bloom
1064
294
First Open Boll
1641
577
95% Mature Bolls
2271
630

 
Table 4. Estimated Time Sequence of Growth and Development Stages in the Cotton Plant.
Planting Date
 --
1st Square 32 Days
--
1st White Bloom 23 Days
--
1st Open Boll 55 Days
--
30% Open 15 Days
--
60% Open 10 Days
--
85% Open 20 Days
--

 

Table 5. Projected Dates of Crop Growth Landmarks for Various Planting Dates Based on Table 4
Planting
Date
1st
Square
1st White
Bloom
1st Open
Boll
30%
Open
60%
Open
85%
Open
5/01
6/02
6/25
8/19
9/03
9/13
10/03
5/10
6/11
7/04
8/28
9/12
9/22
10/12
5/20
6/21
7/14
9/07
9/22
10/02
10/22
6/01
7/03
7/26
9/19
10/04
10/14
11/03
6/10
7/12
8/04
9/28
10/13
10/23
11/12
6/20
7/22
8/14
10/08
10/23
11/02
11/22
* Keep in mind that these dates are estimates, warmer and cooler temperatures will hasten and delay crop maturity, respectively.

 


Posted at this web site by:
texagnet Internet Services.