 |
|
 |
|
 |
|
       |
Sap Beetles - (several species)  Keith Weller, USDA ARS,
www.forestryimages.org
 HOSTS: Corn. DESCRIPTION:
Adults
are 3/16 inch long, gray/black, oblong beetles; larvae are worm-like. LIFE
CYCLE: Beetles
first emerge when early corn cultivars are beginning to tassel and are
active over an extended period. Larvae feed within the host plant, then
crawl out, fall to the soil where they pupate. The entire cycle may
take as little as 3-4 weeks. Two to three generations may occur per
year. CONTROLS:Mechanical: If populations are small, they can be handpicked. Botanical: Spray with rotenone if 5% of the ears have adult beetles. |
|
|
|
 |
|