Henry's Woods (6) : 無料・フリー素材/写真
Henry's Woods (6) / Nicholas_T
ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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説明 | Hemlock woolly adelgid (Adelges tsugae), Jacobsburg Environmental Education Center, Northampton County.The hemlock woolly adelgid is an exotic insect pest that has wreaked havoc on forest ecosystems across eastern North America. Small, white, cottony sacs at the base of the needles indicate the insects’ presence. At the park, some of the old-growth hemlocks are infested. To save the trees, the park service has used a combination of biological controls (predator beetles) and insecticide injections. The beetles have not been reliably effective. |
撮影日 | 2012-04-01 17:18:48 |
撮影者 | Nicholas_T |
タグ | |
撮影地 | Plainfield, Pennsylvania, United States 地図 |
カメラ | FinePix HS20EXR , FUJIFILM |
露出 | f/11.0 |
開放F値 | f/11.0 |