. An address upon farm pests, including insects, Fungi, and animalcules . ucive to very rapid growth,is usually liable to develop the pest. We believe that all strawinfected to a large extent should be burned, and all grasses andweeds standing around such fields should share the same this way the principal danger might be avoided. Another instance of the two-formed condition of the smallerfungi can be traced in the delicate condition of moldinesswhich frequently covers the leaves of the lilac, the grape, thefruit of the gooseberry, and various other plants. It looks likestrings of bead
. An address upon farm pests, including insects, Fungi, and animalcules . ucive to very rapid growth,is usually liable to develop the pest. We believe that all strawinfected to a large extent should be burned, and all grasses andweeds standing around such fields should share the same this way the principal danger might be avoided. Another instance of the two-formed condition of the smallerfungi can be traced in the delicate condition of moldinesswhich frequently covers the leaves of the lilac, the grape, thefruit of the gooseberry, and various other plants. It looks likestrings of beads made of colorless cells. In this condition it isknown and described as Oidiiim. Fig. 30, a, tufts of conidia of the Oid-ium Monilioides; b, portion of grass leafwith same species of blight, the sporesbeing the self-same beads and egg-shapedbodies, whence the generic name, butcareful observation will show us that thisis not its perfect condition; and when,later in autumn, these threads becomemore compact, and are surmounted ontheir horizontal surfaces by shining black. 54 capsules, or perithecia, each of which is filled wiih elegantelliptical and elongated cells, and each in turn containing sev-eral spores, we shall find in Erisyphe that we have arrived at theconclusion of the dimorphism of this fungus, so injurious in itseffects. The famous grape mildew, so destructive to the grapes of Eu-rope, and known as Oidiiim Tuckeri, is also only an imperfectform of some common Erisyphe; so of the grape fungi of NewEngland, as well as of various other fungal plants. Even the cluster cup first described is quite likely to turn outbut one form of the rust, on some other plant. Some, as I havebefore said, even now suppose it identical with the Fuccinia,and with good reason. SMUTS. Another of the fungal diseases of grain, long and widelyknown among agriculturists, is here called smut. Differentnames have been given it in different localities. In some itis dust-brand, in others, bunt-ear, b
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