. Fruits, vegetables and flowers, a non-technical manual for their culture. inijx.^lris, Paininci).—This is a bacterialdisease wliich attacksall of the above andmany related starts at the edgesof the leaves, causinga blackening of theveins, gradually work-ing downward to themain stalk and thenupward and o\itwarduntil the entire plant isaffected. The affect((| plants, (.nising unsightly knott<xlroots. The diseased ])lants are dwarfed and full to develop hcada. * From FonDcm* Bulletin 488, U. S. Di-pt. of .\ Enlarged Roora op Cabbacb Caused iiy Nematxides. DISEASES OF CR
. Fruits, vegetables and flowers, a non-technical manual for their culture. inijx.^lris, Paininci).—This is a bacterialdisease wliich attacksall of the above andmany related starts at the edgesof the leaves, causinga blackening of theveins, gradually work-ing downward to themain stalk and thenupward and o\itwarduntil the entire plant isaffected. The affect((| plants, (.nising unsightly knott<xlroots. The diseased ])lants are dwarfed and full to develop hcada. * From FonDcm* Bulletin 488, U. S. Di-pt. of .\ Enlarged Roora op Cabbacb Caused iiy Nematxides. DISEASES OF CROPS 217 Treatment.—Use nothing but absolutely clean soil in the seed-beds;use lime in the fields; rotate crops. CANTALOUPES AND MELONSLeaf Blight {AUernaria hrassicce [Berk.], Sacc. var. nigrescens, Pegl.).—This disease starts as small brown spots with concentric rings, which enlarge, unite and fre-quently cause the de-struction of the entireleaf. The melons ripenprematurely and aresoft, wilted and in-sipid. —Ro-tate crops and spraywith Bordeaux mix-ture. Downy Mildew.—See Cucumber. Anthracnose {Col-letotrichum lagenarium[Pass.], Ell. and Halst.).•—This disease attacksall parts of the vines ofcucumber and squash,but is most injuriousto watermelons, causingthe buds and tendrilsto die and turn blackand the leaves to turnyellow. It is very no-ticeable on the fruit,causing sunken canker-like spots with pinkishcenters. When theyoung fruit is attackedit is likely to have abitter —Spray w
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