Fungous diseases of plants . ction is important, but itis not sufficient to selectseed which do not appearto be infected, for manyminute infections will be overlooked. It is desirable, therefore,to select healthy seed from healthy pods, preferably from a fieldwhich shows the disease slightly or not at all. Whetzels experi-ments thus far seem toindicate that this lattertype of selection yieldsmost satisfactory with Bor-deaux mixture, 5-5-50formula, is to be advisedwhen the disease ap-pears early and when the facilities are at hand to make a thoroughapplication of the spray. Bur
Fungous diseases of plants . ction is important, but itis not sufficient to selectseed which do not appearto be infected, for manyminute infections will be overlooked. It is desirable, therefore,to select healthy seed from healthy pods, preferably from a fieldwhich shows the disease slightly or not at all. Whetzels experi-ments thus far seem toindicate that this lattertype of selection yieldsmost satisfactory with Bor-deaux mixture, 5-5-50formula, is to be advisedwhen the disease ap-pears early and when the facilities are at hand to make a thoroughapplication of the spray. Burning infected material is necessary;moreover, rotation of crops is important. 1 The setae in this case are not commonly a conspicuous part of the acervulus,and in a cursory examination of the fungus they may be sometimes fact, this fungus was at first placed in the genus Gloeosporium. It is possiblethat climatic conditions or the texture of the host may be important in determin-ing the relative number of Fig. 156. COLLETOTRICHUM LiNDEMUTHIANUM FUNGI IMPERFECTI 325 XXVII. ANTHRACNOSE OF COTTONColletotrichum Gossypii South worth Atkinson, G. F. Anthracnose of Cotton. Journ. Mycology 6: 173-178. pis. iy-i8. , G. F. Some Diseases of Cotton. Ala. Agl. Exp. Sta. Ikillt. 41: 40-49. figs. g-13. , E. A. Anthracnose of Cotton. Journ. Mycology 6: 100-105. pl. 4. figs. 1-8. 1890. Habitat relations. Anthracnose of cotton exists as a malady ofsome importance upon rich land in some of the cotton-growing,particularly theGulf, states. Itwould seem thatthe fungus is widelydistributed, butserious injury isdoubtless depend-ent upon local con-ditions. The lesions ofthis fungus aremore importantwhen bolls andseedlings are in-fested, but injuriesto stems and leavesare not the bolls theminute reddishspot at first evi-dent about an infec-tion center rapidlyincreases in size,the injured area,marked by a red-dish border, becom-ing black and
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