356 BULLETIN No. 189 [June, 



May 20 they all showed some scab. A number were infected at the crown, where 

 a large number of leaves were completely cut off at the base by the fungus. Sev- 

 eral beets had depressed lesions which extended deep into the tissues. 



"Carnation" on Cabbage. 25 plants. On May 8, young cabbage plants 

 were transferred from flats to a section (No. 163) in the greenhouse infected 

 with a soil culture of Khizoctonia from carnation. Some of these plants grew 

 to maturity, but when they were pulled up, May 21, the stems and roots were cov- 

 ered with black, depressed lesions (Fig. 11). Ninety percent of the plants set in 

 the bench were infected in this way. , Where the leaves touched the soil the fun- 

 gus caused a slow, wet rot. 



"Carnation" on Carrot. 50 plants. Carrot plants were transferred on 

 May 8 from flats to an infected section (No. 158) in the greenhouse. By May 

 21 only a few had rotted. The rot started at the crown, where the petioles were 

 attacked, and worked down into the tissues of the root and up into the leaves. 

 The rot from the crown goes into the interior of the root, and thus the root does 

 not show any signs of rot on the outside for some time. Occasionally lesions 

 were found on the sides of the carrots and on the larger roots where they branched 

 from the fleshy part. 



"Carnation" on Corn. 10 seedlings. Corn seedlings about 8 inches tall 

 were transplanted on May 8 from flats to an infected section (No. 153) in the 

 greenhouse. The plants grew to maturity. When pulled up, only small lesions 

 were to be found on the roots. These were only slightly depressed and did not 

 retard the growth of the plant. 



"Carnation" on Eggplant. 25 plants. On May 8, eggplants were trans- 

 ferred to an infected section in the greenhouse (No. 170). The plants reached 

 maturity with no loss. When they were pulled up, no infection was to be found. 

 "Carnation" on Lettuce. 60 plants. On March 16, lettuce plants were 

 transferred to an infected section (No. 153). By March 24, 16 percent of the 

 plants were killed. No more loss occurred and the plants were cut on April 21. 

 "Carnation E. 107" on Cabbage. 100 seeds. Seeds germinated March 19 

 and began to damp off immediately. By May 21 those which did not damp off 

 were infected in various ways. Some had constrictions just at the surface of the 

 soil; others had definite lesions along the stem and larger roots. Where the plants 

 were crowded, spots of various sizes were formed on the lower leaves which touched 

 the soil. 



"Carnation E.M.%" on Carrot. 150 seeds. Seeds germinated March 18. 

 When the experiment was discontinued, May 21, only 10 percent of the carrots 

 were infected at the crown. One showed a constriction which was quite marked. 



* ' Carnation E.F. ' ' on Beet. 100 seeds. Seeds germinated March 16 and 

 began to damp off immediately, so that by March 24, 40 percent of the plants 

 were dead. The remainder, when examined on May 21, were all more or less 

 scabby. Some were rotted at the crown. 



"Carnation E.F. 2" on Bean. 30 seeds. Seeds germinated March 19. When 

 the experiment was discontinued, May 8, but slight infection could be noticed. 



"Carrot" on Carrot. 150 seeds. Seeds germinated March 16. By May 21 

 only a few of the carrots were infected. An occasional plant showed crown rot, 

 which was especially noticeable at the base of the leaves. 



"Cauliflower" on Cabbage. 100 seeds. Seeds germinated March 13. A few 

 seedlings began to damp off March 14 and by May 21 most of the plants were 

 infected. Lesions could be found on the stems, occasionally one girdling the whole 

 stem and forming a sort of constriction as the plant developed. A number of 

 spots varying in size could also be found on the lower leaves which touched the 

 soil. 



" Cheno podium" on Alfalfa. 100 seeds. Seeds germinated March 13. Two 

 weeks later 60 percent of the seedlings had damped off in a characteristic manner. 

 "Clover" on Clover. 150 seeds. Seeds germinated March 12 and began 

 to damp' off slowly. By March 21, however, the plants had reached sufficient 

 size so that no more damping-off occurred. In all about 10 percent of the seed- 

 lings were diseased. 



