English grain aphids and bird cherry-oat aphids have also been observed in area small grains. Populations have ranged from low to relatively high. English grain aphids are usually green with black legs, cornicles and antennae and can be easily confused with greenbugs with out magnification. Bird cherry-oat aphids are yellowish green to dark green to black with a reddish-orange area around the base of the cornicles. Both of these species suck plant juices while feeding but do not inject a toxin like greenbugs do. Chemical control of these aphids is rarely justified as they seldom cause yield loss but each field should be closely monitored. The aphids are normally controlled by many of the same predators and parasites that help control the greenbug.
 |
| Illustration Credit, NDSU |
No comments:
Post a Comment