User uShare Login | Register
Login
Register

Along with posting photos, videos, and stories, your uShare account lets you post Classified Ads, recipes on What's For Dinner, and Announcements.


25° View Weather Current Conditions Sioux Falls Change Location
Set Weather Options

RADAR LOCATION

TEMPERATURE LOCATION

 Winter Storm for March 2-3, 2015

Snow Outlook

Severe Weather

State Radar


Click here for local closings & delays

Send photos to ushare@keloland.com

Storm Center Update

 

KELOLAND.com | Sioux Falls News & Weather, South Dakota News & Weather, Minnesota and Iowa News

[0] My Saved Articles
Find local businesses
on the KELO Pages!

 

Longer Summers Make More Pine Beetles

April 24, 2012, 6:27 PM by Ben Cathey

Longer Summers Make More Pine Beetles

Researchers suspected something was different in the pine beetle population. 

Jeff Mitton and his team from the University of Colorado (Boulder) found a complete new generation of beetles living from June through August.  Before this, the bugs weren't believed to be flying this early.

"Although we view this as extraordinary because of the visual impact and impact that it has on the landscape, many insects are showing similar responses," Mitton said.

Beetles can lay around 60 eggs in a year, so an extra generation would spawn a very large number of grandchildren in one summer.  With closely-packed pine stands, the beetle armies swell.

"But it's an exponential increase in how many survive and therefore a whole lot more trees are getting hit," Mitton said.

Pines use resin to push the beetles out of their bored holes.  Just a few beetles cannot overtake a big tree, but…

"The beetle wins when enough beetles attack a single tree that the resin pressure goes to zero," Mitton said.

Drought dehydrates the pines and keeps them from making defensive resin.  The Black Hills are still in a drought.

"Springtime's coming earlier, fall's coming later, the summers are longer, but they're not necessarily wetter.  And so the trees are seeing a longer, and the way they measure it, a drier year, because they have the same amount of water and they are trying to grow for a longer time now," Mitton said.

If groves become too dense, plants have to compete for water even more and beetle families tend to cluster in these areas anyways.  Earlier research from colder Canadian zones found beetles that once took around three years to grow can now do so in one.  

Previous Story

Next Story


Comments





Sponsored
Find Local Businesses on KELO Pages!

View weather

You may also like

Storm Center Update - Sunday AM

3/1/2015 5:47 AM

Temperatures this morning are mostly in the single digits and teens with clouds moving out of the area. Some areas of southern KELOLAND could see some...

Full Story
Storm Center Update - Sunday PM

3/1/2015 4:04 PM

The snow will most likely start after sunset on Monday in southwest and south central South Dakota and move east Monday night into Tuesday

Full Story
Snow Falling Across KELOLAND

2/25/2015 9:43 AM

With snow piling up across KELOLAND, make sure you are ready for whatever the conditions bring when you leave home.  

Full Story
Storm Center Update - Monday PM

3/2/2015 3:05 PM

First and foremost are the Blizzard Warnings that cover central and eastern KELOLAND

Full Story


Events