University of Nebraska-Lincoln
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University of Nebraska-Lincoln |
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Description: Small blue/green, usually wingless insects in the whorl and tassel. Damage Symptoms: Feeds by sucking juices from corn plant; does not inject salivary toxins. Incidence: Throughout the growing season. Sampling Scheme: Examine 5 sets of 20 plants during late whorl stage and tassel emergence. Economic Threshold:15 - 30 aphids per plant 14 - 21 days before tasselling may indicate the need to treat; populations often decline after tassel emergence. More Information and Treatment Recommendations:http://www.unl.edu/entomology/extension/crops/fieldcorn.shtml |
