Forest stands of red oaks, with their tannin-rich foliage, may even provide caterpillars with safe havens from disease.
红栎树的林分枝的叶子富含鞣酸，甚至可以为毛毛虫提供远离疾病的安全避难所。
2
They found that on tannin-rich oak leaves, the virus is considerably less effective at killing caterpillars than when it is on aspen leaves, which are lower in phenols.