Full Site View
Quick Links
  My Bulletin
  Contact The Bulletin

Mail: Southern statutes symbolize suppession

Mail: Thanks for helping Aiden

More opinion

Ag News

Robertson and Delsing re-elected chair, vice chair of NWB

Goat Expo set first October weekend

More Ag News

NorthPlatte Weather

Email Article | Print Article
News - State/Regional News
Spider Mite Outbreak: Juniper and CedarTell North Platte what you think
Courtesy Photo­Image
A fine web

Spider mites can be quite the nuisance and in some cases very detrimental to host plants.  Some western counties in the state are seeing high and damaging populations of twospotted spider mites on juniper and cedar trees. 

Infested trees have fine mats of webbing on branches and foliage. Foliage may turn yellow or bronze. During hot, dry weather, mite populations can increase rapidly in just a few days. 

The twospotted spider mite is a warm season mite active throughout the summer. 

Several factors can cause an increase in mite populations. 

Excessive use of nitrogen fertilizers make foliage more succulent and favorable for mites. Non-selective insecticide treatments that kill beneficial predators of mites give the mites an advantage. Mites can also build resistance to a miticide if only one variety is used. 

Twospotted spider mites do not overwinter on the host plant. They overwinter in grasses or weeds close to the host plant and even in the nearby soil, so forb and grass density may contribute to higher mite populations. Mowing routinely around host plants may help, but excessive weed control throughout the year may allow mite populations to move to other hosts.

Miticides can help control spider mites when they are present. Applications of a product with an active ingredient of bifenazate, hexythiazox, spiromesifen or etoxazole can be effective. Even certain horticultural oils and insecticidal soaps work if labeled for mites. Twospotted spider mites are active from late spring to fall and two or more applications should be made at 7 to 10-day intervals. 

Keep in mind that mites can build resistance to a product and switching between products can be beneficial. 

For more information, contact the Nebraska Forest Service. Visit our website http://nfs.unl.edu/.

Like this story to send to your facebook

The North Platte Bulletin - Published 7/6/2017
Copyright © 2017 northplattebulletin.com - All rights reserved.
Flatrock Publishing, Inc. - 1300 E 4th St., Suite F - North Platte, NE 69101
Show me Talk Back during this visit