Drwg by Wm. Kuehn
_How to make pollen gun._]
Chapter 21
TOXICITY AMONG TREES AND PLANTS
Although quack grass will grow luxuriantly up to the trunks of both
black walnut and butternut trees, I know, from things I have seen
myself, that the roots of the latter and probably of the former have a
deadly effect on members of the evergreen family. I have seen northern
white pine and other pines, too, suddenly lose their needles and die
when, as large trees, they have been transplanted to the vicinity of
butternut trees. To save as many of these transplanted trees as
possible, it was necessary for me to sacrifice almost one hundred fine
butternut trees by cutting them off close to the ground and pruning all
the sprouts that started.
Other instances have also demonstrated to me this deleterious power of
butternut trees over evergreens. For years, I watched a struggle between
a small butternut tree and a large Mugho pine. Gradually the Mugho pine
was succumbing. At last, when the pine had lost over half its branches
on the side near the butternut, I decided to take an active part in the
fight. I cut off the trunk of the butternut and pruned off all of its
sprouts.
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