Crop & Pest Report

Accessibility


| Share

Invasive Insect Watch (06/23/16)

If you see any of these insects, please contact your local county extension office, the North Dakota Department of Agriculture or one of the authors listed below. Thank you

Invasive Insect Watch

If you see any of these insects, please contact your local county extension office, the North Dakota Department of Agriculture or one of the authors listed below. Thank you.

 ent.1

Japanese Beetle (JB), is an invasive insect native to Japan that was discovered in the eastern USA in 1916. Since that time it has slowly spread west. JB has been found in low numbers in North Dakota each year since 2012. The large ½” metallic green beetle with bronze wing-coverings attacks a broad range of host materials including turf grasses (larva), field crops (corn and soybeans), and 300+ species of ornamentals. ND Dept. of Agriculture is conducting trapping surveys to help determine how widespread JB populations are in ND. JB has been caught in 12 counties in ND, with three counties believed to have small established populations (Burleigh, Grand Forks, and Cass counties). See NDSU Extension Service fact sheet E1631 IPM of Japanese Beetle in ND for more info.

 ent.2

Emerald Ash Borer (EAB) is an invasive pest from Asia that feeds on ash trees (Fraxinus spp.). Likely introduced via wood packing material in the late 1990s, the beetle has been found in 27 states including 12 counties in neighboring Minnesota.  EAB has not yet been found in North Dakota. EAB has killed tens of millions of ash trees across the country, and is spread through the movement of infested nursery stock and firewood. Adult beetles are 1/2” long with a metallic green body. The larva damage the conductive tissue under the bark, restricting the trees ability to move nutrients. USDA-APHIS-PPQ is conducting a trapping survey in uninfested states. See NDSU Extension fact sheet E1634 EAB:  Biology and IPM in ND for more info.

 ent.3

Brown Marmorated stink bug (BMSB) has not been found in North Dakota yet, but it is in neighboring states – eastern Minnesota and Iowa. This is a large stink bug (¾ inch long by ⅜ inch wide) and could become a pest of soybean, dry bean and field corn. Adults and nymphs damage developing seeds by injecting a toxin into the seed resulting in deformed seeds. In the fall, these stink bugs have a bad habit of trying to get into homes, just like the box elder bug. Identification is based on white band on antennae and alternating black & white banded on edge of abdomen. We are participating in a NC Soybean Research Program multistate project and surveying for BMSB in soybean fields in eastern ND this year.

 ent.4


Spotted wing drosophila (SWD), is an invasive insect pest of small fruit believed to have originated from Asia. First discovered in North Dakota (ND) on tart cherry in 2013, SWD has spread quickly into 17 counties of ND. Female flies attack fresh and ripening fruits rather than the rotting fruits that similar vinegar flies prefer. Female have a serrated egg-laying apparatus (see photograph below) that she uses to lay eggs in unripe fruits. SWD has been confirmed infesting a number of fruit crops in ND, including blackberry, Juneberry, raspberry, tart cherry and grape. See NDSU Extension fact sheet E1715 IPM of SWD in ND for more info.

 

 Charles Elhard

 Plant Industries, ND Dept. of Ag

&

Janet J. Knodel

Extension Entomologist

This site is supported in part by the Crop Protection and Pest Management Program [grant no. 2017-70006-27144/accession 1013592] from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed are those of the website author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

USDA logo

Creative Commons License
Feel free to use and share this content, but please do so under the conditions of our Creative Commons license and our Rules for Use. Thanks.