Tag Archives: Cotton

Early Season Cotton Maturity

I’ve been asked by a few growers “Why is my cotton growing so slowly?” The answer is primarily cold temperatures. The table below shows how many days are usually required to get from one stage to another. Notice emergence to first square usually takes 27 to 38 days. The difference between these is how warm or cold temperatures are. SOURCE I planted a cotton variety trial in Austwell, TX on March 12, or 47 days ago. Today this test is at 6-7 true leaf and I am finding… Read More →

South Texas audio updates

We have been recording pest updates in effort to provide a brief audio version of South Texas newsletters and blog posts. The reports include crop production and pest management updated from South Texas, including the Rio Grande Valley, Coastal Bend and Mid-Coast. You can get these by following this link: https://www.texasinsects.org/south-texas.html The latest edition is: 4/16/2021 (audio file) Fall armyworm and corn earworm feeding present in corn and sorghum whorls, but threshold is generally 30% defoliation across most plants. Corn leaf aphids and sugarcane aphids generally being controlled by… Read More →

2020 Cotton Variety Trial Results

The Cotton Variety Trial in Calhoun and Refugio Counties. These tests should be used along with other similar tests from South Texas to help determine the what to plant next year. Port Lavaca, TX Austwell, TX Bonnieview, TX

Nodes Above White Flower

Counting Nodes Above White Flower (NAWF) is a good way to monitor a cotton field’s maturity after bloom. The process is done by finding the first position white flower and counting the number of nodes (branches) above the branch with the white flower. The last node to count is the highest node with an unfurled main stem leaf (at least 1-inch wide). NAWF is useful for management of your cotton crop. By tracking NAWF, you can see how the crop is maturing compared to an expected growth curve. … Read More →

Pest Update and 2020 Insect Thresholds

This week we have been finding low numbers on insect pests in cotton, grain sorghum and soybeans. Cotton ranges from 1/3 grown square to mid-bloom. While most fields are below threshold, we have found a few fields with 30-40 cotton fleahoppers per 100 plants. Continue to monitor for cotton fleahoppers until bloom and treat when they exceed an economic threshold of 15 per 100 plants. Blooming cotton has had significant bollworm moth flights this week but so far, egg numbers have been low. Bollworms are important pests and should… Read More →