Tag Archives: Corn

Corn Leafhopper Update 6/18/25

Posted on by

We have found a few corn leafhoppers in Victoria corn fields.  These have been much more difficult to find than last year. I suggest you listen to the update below to learn how Dr Kerns is finding them in corn fields in the Brazos valley. Most of the corn in the mid-coast is in dent stage and well past the damage window of the corn stunt disease transmitted by the insect. A Corn Leafhoppers update from Dr David Kerns is available here: https://soundcloud.com/user-766365640-259391064/corn-leafhopper-update-6-18?utm_source=clipboard&utm_medium=text&utm_campaign=social_sharing You can get text message… Read More →

Corn Update 5-30-25

Posted on by

I received a call early Tuesday about a Victoria county corn field with purple/red leaves below the ear. When I visited the field, I found what looked similar to the corn stunt we saw last year, but most of the discolored leaves were at or below the ear. Since looking at this field we have found other fields in Victoria and Calhoun county with similar symptomology. I don’t think this is Corn Stunt since we have not been finding the corn leafhoppers. Other options include nutrient deficiency. The… Read More →

Corn Leaf Aphids in Corn

Posted on by

Today, I received a report of corn leaf aphids being found in some corn that is beginning  to tassel. There is little research that has been conducted on management of corn leaf aphid in corn. Often we find the aphid in low numbers pre-tassel and consider them to be beneficial because they serve as a food source for predacious and parasitoid insects. If I had to choose a treatment threshold, I would probably treat a field if more than 30% of the plants had over 50-100 aphids per… Read More →

IPM in Fall Corn Production

Posted on by

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

Posted on by

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 →