Below-ground Insect Pests of Peanuts

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Scouting techniques (southern corn rootworm) • Larval infestation –scout close to pegging stage • Spade sampling with a tray (larvae drop off quickly) • Sweep net sampling for adults is reliable (10 sweeps/10 paces X 5 loc./A)…midmorning • Check pods for circular holes at one end • ET: fresh damage evident OR larvae present in 1/3 rd sites
Lepidoptera: Pyralidae Lesser cornstalk borer • Occurrence: one of the major insect pests of peanut, sporadic • Host range: wide, hot‐spots in peanut • Identification: larvae are blue‐green with purple bands. Moths are grayish, wings folded at rest, bushy abdomen (females) • Overwintering stage: larvae/pupae • Behavioral clues: • able to survive dry soils (escapes predation) • attracted to CO 2 and heat from plant roots • larvae make sand tubes
Page 1 and 2: Below-ground Insect Pests of Peanut
Page 3 and 4: Damage by burrower bugs • Damagin
Page 5 and 6: Coleoptera: Curculionidae Whitefrin
Page 7 and 8: Scouting techniques (whitefringed b
Page 9: Damage by southern corn rootworm
Page 13 and 14: Scouting techniques (lesser cornsta
Page 15 and 16: Damage by wireworms • Damaging st
Page 17 and 18: Agrotis ipsilon Agrotis subterranea
Page 19 and 20: Other sporadic insect pests White g
Page 21 and 22: Scouting recommendations (contd.)
Page 23: Take home message for today…

Below-ground Insect Pests of Peanuts

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