. The fungi which cause plant disease . Plant diseases; Fungi. 522 THE FUNGI WHICH CAUSE PLANT DISEASE The cause of leaf spots of tomato. It was noted in New Jersey about 1893»" and in Ohio in ISQG.^'^ It is one of the serious tomato pests. S. lactucae Pass.^^"* Spots irregular, brownish, angulate, sometimes destroying the entire leaf, pycnidia minute, punctiform, scattered, 90 n in diameter, conidia filiform, straight or curved, 25- 30 X M- On lettuce. S. consimilis E. & M.'* Distinguishable from the preceding by the more indefinite spots, slightly larger pycnidia (90-100
. The fungi which cause plant disease . Plant diseases; Fungi. 522 THE FUNGI WHICH CAUSE PLANT DISEASE The cause of leaf spots of tomato. It was noted in New Jersey about 1893»" and in Ohio in ISQG.^'^ It is one of the serious tomato pests. S. lactucae Pass.^^"* Spots irregular, brownish, angulate, sometimes destroying the entire leaf, pycnidia minute, punctiform, scattered, 90 n in diameter, conidia filiform, straight or curved, 25- 30 X M- On lettuce. S. consimilis E. & M.'* Distinguishable from the preceding by the more indefinite spots, slightly larger pycnidia (90-100 m) and longer conidia (30-45 x m)- It causes brown spots on lettuce leaves. Fio. S. armoraciae Sacc.» of s. lycopersici. Spots irregular, ochraceous; pycmdia puncti- form, grouped in the center of the spot, 60 n; conidia filiform, curved, 15-20 x ju, 1 to 3-septate. On horseradish causing leaf spot. S. antirrhini Desm. attacks the snapdragon severely.*''' S. rosse Desm. is on rose; S. hydrangeas Bizz. on cultivated hydrangea; S. iridis C. Mass. on Iris. S. cyclaminis Dur. & M. on cyclamen. S. sedi West. Epiphyllous; spots circular, gray to gray-brown; pycnidia mi- nute, numerous, brown, scattered, erumpent; conidia cylindric, straight or curved, 5-guttulate; cirri white. On cultivated Sedum. S. hederse West, is on Hedera; S. rostrupii Sacc. & Syd. and S. varians Jaff. on chrysanthe- mum; as is also: S. chrysanthemella Cav.**' ^"' Spots ochraceous, dark mar- gined; pycnidia epiphyllous, punctiform; conidia 40-50 x m, obscurely septate. It causes damping off of chrysanthemum cuttings and spotting of the ;' S. dianthi Desm.^* Spots yellowish, oblong, roundish or irregular; pycnidia globose,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Stevens, Frank L
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
