. Civic biology; textbook of problems, local and national, that can be solved only by civic coöperation. Biology. FUNGOUS AXl) JJACTEKIAJ. DISEASES â 2\]. parasites destroy more timber aniiiuilly than do lurcsL lirt-s. The visible portions, the sporophores, of these tree-destroying fungi are pushed out at certain s(>asons, or during certain weather conditions, and pour clouds of spores into the air to infect surrounding trees. These disease breeders should be the first to be made hito lirewood in animal cuttinir from the wood lot. The sporophores slnnild also be destroyed as soon as they a
. Civic biology; textbook of problems, local and national, that can be solved only by civic coöperation. Biology. FUNGOUS AXl) JJACTEKIAJ. DISEASES â 2\]. parasites destroy more timber aniiiuilly than do lurcsL lirt-s. The visible portions, the sporophores, of these tree-destroying fungi are pushed out at certain s(>asons, or during certain weather conditions, and pour clouds of spores into the air to infect surrounding trees. These disease breeders should be the first to be made hito lirewood in animal cuttinir from the wood lot. The sporophores slnnild also be destroyed as soon as they appear, lly a little intelligent cooperation a connnu- nity could bring these pests under control, and liowever valuable the trees may be in themselves, the sttidy will be worth while as an example of spread and preven- tion of disease. Koot rot of fruit trees is a matter that will call for special attention in certain sections. Two con- spicuous mushrooms, Cli- tocyhe parcifiitica and the common honey mush- room (Armi/laria mellea), show strong parasitic tendencies when brought into contact with the roots or crowns of apple, peach, or cherry trees. In clearing- land for orchards it is advisable to remove all stumps and roots that are likely to harbor these fungi. Invite the local forester or tree surgeon to discuss these jiroblems with the class. Learn from him the best treatment for tree wounds. (A^'ounds of any size made in [nnining should be sealed with paint or gas tar.) As laboratory work let. the class, in convenient groups, make some experiments in tree surgery where most needed about homes, school vard, or streets. Civic types for study. Duggar describes, or mentions, in his book " Fungous Diseases of Plants," 238 fungi that attack the common plants and trees of forest, orchard, garden, and field. Tie also gives a most useful Host Index Fig. 100. Apple inoculated, at pin, with spores of brown rot from nuunmied plum. Control apple As instructive as a case of
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