Predicting insect pressure this early in a growing season is difficult. In general, we know overwintering insect survival is driven by environmental conditions. Mother Nature has equipped insects with physiological mechanisms and behaviors to deal with the extremes of the environment for overwintering survival. Some insects do not overwinter where they are a pest but migrate and move to other areas where they will become a pest.
Corn Overwintering In-place Insects
Corn flea beetles will probably be more severe in 2017 due to the relatively mild winter up until March. Corn flea beetles are known to spread Stewart’s wilt, a bacterial disease of corn. Corn flea beetles are black in color and will often, “hop” like a flea as well as crawl but are weak fliers. Other flea beetles will vary in color and often are striped. Start looking for flea beetles as early as emerging coleoptile corn, typically seen at V-2 corn and later. Flea beetle damage is distinctive leaving a “white racing stripe”, approximately 1/8 to several inches long. Corn Flea Beetle recommendation: Mustang® Maxx insecticide 2.72 – 4 oz./A or Hero® insecticide 2.6 to 6.1 oz./A
Black cutworm adult moths are blown by northerly winds out of Texas. Pastures are greening up earlier than usual and with adequate moisture will have a higher than usual number of black cutworm adult moths. While black cutworm have not been at the levels seen in the past, the potential exists for some heavy feeding damage and corn stand loss in 2017 throughout Indiana, Michigan and Ohio. Mustang Maxx insecticide or Hero insecticide may be tank mixed with Anthem® MAXX herbicide for either pre-plant, at-plant, pre-emergence and early post applications to make trips count in corn. Black Cutworm recommendation: Mustang Maxx insecticide 1.28 – 2.8 oz./A or Hero insecticide 2.6 – 6.1 oz./A
2016 had a slight increase in bean leaf beetle numbers and some acres warranted spraying. The warm winter will allow greater survival allowing more overwintering beetles to attack newly, emerging soybeans. Bean leaf beetle are responsible for spreading bean pod mottle virus which can severely reduce soybeans yields. Bean leaf beetle have many different color variations but all have a dark or black triangle on the back side of the thorax. Bean Leaf Beetles recommendation: Mustang Maxx insecticide 2.8- 4 oz./A or Hero insecticide 2.6 – 6.1 oz./A
Content courtesy of FMC Corporation. Always read and follow label directions.
Read More About: Bean Leaf Beetle, Black Cutworm, corn flea beetles, insects, novus ag, pests