Pine sawflies terrify forest owners, but they help researchers understand the evolution of cooperation. A study conducted at the University of Jyväskylä shows that ecological context affects the ...

Entomologists have warned that European sawflies — invasive bugs that resemble wasps — are taking over pine trees in Washington's Pierce County, perhaps most well-known as the home of Mount Rainier ...

Pine sawflies terrify forest owners, but they help researchers understand the evolution of cooperation. A study conducted at the University of Jyväskylä shows that ecological context affects the ...

If your pine tree is suddenly infested with a black-headed, Medusa-like worm, fear not — chances are the tree is simply hosting a colony of European Pine Sawfly larvae. Sawfly larvae hatch in March or ...

Pine sawflies terrify forest owners, but they help researchers understand the evolution of cooperation. A new study shows that ecological context affects the frequency of cooperators and freeloaders ...

Gardeners know that amidst the promises of each new growing season come its challenges, usually in the form of weather or pests. A common insect pest this time of year are sawfly larvae, which feed on ...

Do you have a pine, especially a mugo, Austrian, jack, or red pine in your yard? Now is a good time to check it for European pine sawfly activity. These insects are caterpillar-like with black heads ...

FRANKTOWN, Colo. (CBS4) - A pine sawfly outbreak is projected to once a again wreak havoc on ponderosa pines in Elbert County this year. The Colorado State Forest Service released a report this week ...

An outbreak of pine sawfly, a native insect that removes leaves from ponderosa pines, has reached "epidemic levels" in counties south of Denver, including El Paso, according to the Colorado State ...

Getting your Trinity Audio player ready... A stout brown wasp called the sawfly, eating needles off ponderosa pines across 7,430 acres southeast of Denver, is expected to spread — turning more pines ...

FRANKTOWN, Colo. (AP) — The Colorado State Forest Service says the pine sawfly, a native insect that defoliates ponderosa pines, has reached "epidemic" levels south of Denver. The outbreak was ...