Development of a system to time scouting for the lesser cornstalk borer (Lepidoptera: Pyralidae) attacking peanut in Southeastern US

CRSP:   |  Region:   |  Topic: ,   |  Database:

TP Mack; DP Davis; RE Lynch

Type of Document:
Scholarly Article


Journal of Economic Entomology

Date of Publication:

Place of Publication:
Not Available


Abstract: We developed a system to time scouting for the lesser cornstalk borer, Elasmopalpus lignosellus (Zeller), in conventionally planted and tilled fields of peanut, Arachis hypogaea (L.). The system used borer-days (BD) to predict when to scout for the damaging larval stage. Borer-days was patterned after degree-days and is a running total of hot and dry weather minus cooler and wetter weather during the growing season. Number of borer-days explained 67% of the variance in the density of E. lignosellus larvae during the 1986 population outbreak in Alabama and Georgia. We calculated the number of borer-days for the past 9 yr and found that borer-days reached >10 in the outbreak years of 1980, 1986, and 1990 but never reached this value in years when E. ligllosellus did not achieve outbreak densities. Applying a granular insecticide at 0 to + 10 BD increased yield compared with yield in untreated plots. Yields did not increase when a granular insecticide was applied at <0 BD. Borer-days can be a valuable tool in predicting when to scout for this insect.

Additional Bibliographic Information

Coming soon

Send us your questions or comments

Your Name (required)

Your Email (required)


Please enter this text: