Tag Archives: Corn

IPM in Fall Corn Production

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There are several growers who have planted corn crops for fall production. Much of the fall corn is sweet corn crops but other purposes exist as well including tourism. Insect issues can be more severe for fall planted corn and the crops should be monitored for pest insects. The three more likely insect pests that may develop into problems include fall armyworms, corn leaf aphids and corn leafhoppers. The corn leafhopper is the insect of greatest concern; not just because of what it can do to the current… Read More →

Leafhoppers in Corn: Update

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Short story: Spraying to control leafhoppers in dent stage corn is not likely to benefit the crop. Corn Maturity: As of May 29, 2024, most of the corn in the mid-coast of Texas is at dent. The time required from early dent to maturity is 20-35 days. Insect populations: Every corn field I have visited has leafhoppers at some level. Leafhopper numbers range from less than 1 per plant to 15-20 per leaf. Plant symptoms: A minority of the corn fields show symptoms of leaf yellowing to reddening or death and <2%… Read More →

Corn Leafhoppers

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As a continuation of this year’s strange insect problems, we now have Corn Leafhoppers in some corn fields of the Mid-Coast. This insect is not uncommon but showed up in corn fields in the Rio Grande Valley (RGV) a few weeks ago and is now appearing in some local corn fields in numbers great enough to cause concern. Today, May 24, I visited a Victoria County corn field and found corn leafhoppers in numbers ranging from 1 to 30 leafhoppers per leaf. Most of these insects are below… Read More →

Corn Leaf Aphids in Corn

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A couple of weeks ago, Corn Leaf Aphids were found in corn fields in Calhoun and Jackson counties.  Field populations ranged from 1-3% infested plants to 40% infested plants and infested plants had 1,000-3,000 aphids per leaf in the top three leaves on the plant. Most fields were already tasseling and silking but some were pre-tassel. By the time I saw them in the field (May 2), there was already 10-20% parasitized aphid mummies and large lady beetle larvae of at least two lady beetle species. A research… Read More →

Calhoun County Corn Hybrid Trials

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The Corn Hybrid Trial in Calhoun County was harvested near Port Lavaca, TX on August 19, 2020. These results should be used along with other similar tests from South Texas to help determine the what to plant next year.   A second corn hybrid trial was conducted at another location in Port Lavaca. The results of this trial can be found HERE.