Corn Earworm https://extension.entm.purdue.edu/veg/cornearworm/ We are nearing the end of fresh silk on the dent corn population throughout much of the state. This means that for those of you who have late plantings of sweetcorn that have yet to silk, your threshold will drop back down to 1 moth per night on average to trigger an…Read more about Insect Trapping Updates[Read More]
Sweet Corn
Pheromone trap monitoring of corn earworm (Helicoverpa zea) and squash vine borer (Melittia cucurbitae) is underway throughout the state. Utilizing trap catches in your area can help inform management decisions and avoid unnecessary pesticide applications. Squash Vine Borer (https://extension.entm.purdue.edu/veg/squash-vine-borer/) For those trappers who are currently reporting, we are catching moths regularly in Allen, Marion, and…Read more about Insect Trapping Updates[Read More]
For those of you with late plantings of sweet corn or field corn that is still in the late stages of silking, do not let your guard down! We are still recording high trap catches throughout the state. Almost every reporting location (except for the Purdue Student Farm) is catching a nightly average of moths…Read more about Corn Earworm (CEW) Trapping Updates[Read More]
Squash Vine Borer While we have disseminated several Delta traps throughout the state, we are getting few reports back from collaborators. Those who have reported recently (Allen, Marion, and Knox Counties) are all still reporting adult moths being active and caught in traps. Corn Earworm Be sure that you are monitoring your dent corn in…Read more about Insect Trapping Updates Jul-23, 2024[Read More]
I monitor three different insect pests with pheromone traps to help make informed decisions about when to spray insecticides or take other actions for management. Trap data can be found on the Extension Entomology Vegetables Website. The longest-running is the corn earworm (Figure 1) trapping network. Purdue Meigs farm, in Tippecanoe County, is still catching…Read more about Insect Monitoring Updates[Read More]
This disease is a relatively new disease to Indiana. So far, it has mostly affected field corn. However, tar spot was recently observed on sweet corn. This article will discuss the symptoms, biology and management of tar spot of sweet corn. Tar spot causes dark, mostly circular lesions on the leaves, stalks and husks of…Read more about Tar Spot of Sweet Corn[Read More]
We are looking for sweet corn growers to participate in our 2023 Twilight Vegetable Meeting and Sweet Corn Tasting. Our Meeting on August 24 at Pinney Purdue Ag Center in Wanatah will feature information on pumpkins, pepper, sweet corn, compost, and tomatoes. The event will also include information for consumers/homeowners on Vegetable Gardening, and Private…Read more about Sweet Corn Growers[Read More]
What is buggy whipping? “Buggy whipping” is the term for when leaves in the corn whorl become crinkled and fail to unfurl (Figure 1) properly. It can also be referred to as “twisted whorl syndrome” or “rapid growth syndrome”. Often these crinkled leaves bend toward the ground, resulting in an appearance some liken to a…Read more about Buggy Whipping in Sweet Corn[Read More]
This has been a tough, dry year for all of us. I know my early planting of sweet corn at the research farm, seeded on April 27, has been slow and required irrigation (Figure 1). However, those of you that may be at the tassel or silking stage should keep a close eye on the…Read more about Corn Earworm in Early Plantings[Read More]
We are happy to announce that Purdue Extension is presenting its annual Fruit and Vegetable Field Day on July 20, 2023, at the Throckmorton/Meigs Horticulture Farm, Lafayette, IN. Registration is now open. To register your spot, visit https://cvent.me/5zevYD The field day schedule is very exciting, something for everyone to look forward to. Sweet corn pest…Read more about Purdue Fruit and Vegetable Field Day – Registration Now Open[Read More]