Skip to main content

Volatile semiochemical impact on trapping and distribution in maize of northern and western corn rootworm beetles (Coleoptera: Chrysomelidae)

Buy Article:

$51.00 plus tax (Refund Policy)



1 Field studies evaluated plant attractants and analogues as tools to move corn rootworm beetles (Diabrotica spp.) into areas to be treated with toxic baits for population suppression via mass removal/annihilation of reproductive adults.

2 When dispensed from sticky traps in maize, 2-phenyl-1-ethylamine and 2-phenyl-1-ethanol captured more northern corn rootworm, Diabrotica barberi, than did 4-methoxyphenethanol. Only 2-phenyl-1-ethanol attracted the western corn rootworm, Diabrotica virgifera virgifera, but not until maize matured beyond milk stage.

3 Attraction of D. barberi to the amine, alone or blended with 2-phenyl-1-ethanol, occurred before and after maize flowered but not during intervening silk or blister stages. Attraction recurred during early milk stage at or before 50% emergence of adult female D. barberi or D. v. virgifera, respectively, and before populations declined for the season.

4 Synergistic interaction of 2-phenyl-1-ethylamine with 2-phenyl-1-ethanol in attracting D. barberi females did not occur until maize matured to late milk stage.

5 The amine-alcohol blend (0.44 point sources m−2) doubled the density of D. barberi but not D. v. virgifera when applied to small plots within mostly milk-stage or younger maize. Traps without bait within attractant-treated plots captured more female, but not male, D. barberi than did traps in untreated control plots, hinting that females accounted for most of the observed increase in beetle density.

6 The results suggest that attractants can be used despite phenological limitations to concentrate preovipositional females within field areas and thus to complement a variety of corn rootworm control strategies.

Keywords: 2-phenyl-1-ethanol; 2-phenyl-1-ethylamine; 4-methoxyphenethanol; Diabrotica barberi; Diabrotica virgifera virgifera; behavioural manipulation; kairomone; pest management; plant attractant

Document Type: Research Article


Affiliations: USDA, ARS, Northern Grain Insects Research Laboratory, 2923 Medary Avenue, Brookings, South Dakota 57006, U.S.A.

Publication date: May 1, 2003


Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more