116 



PLASMODIOP MORALES 



Table 4. Showing the effects of basic fertilizers on the control of club root. 



Arker ("35) 

 Blunck CJ9) 

 Deutelmoser (,'-20) 

 Eriksson, '13 



Farsky, '^^6 



Flachs and Kron- 

 berger ("30) 



Gibbs {'32) 



Halsted, '95-99 



Hayuna, '1-\'19 

 Hiltner, "08 

 Hiltner, KorfT, '16 

 Kindshoven, '2i, '2S 



Kreuzpointer, ':?3 

 Magin, '02 

 Miller, '23 

 Motte, '33 

 Murphy, '27 



Naumann, '13 



Osterwalder, '29 

 Schmidt, '-22 

 Vogel, '22 



Wagner, '09 



Whitehead, '35 



Kainit (potash) 

 Favorable results 



2,000 kg. per hectare — 

 favorable 



Favorable results 

 Favorable 



500, 1,000, 2,000 lbs. per 

 acre — poor results 



Favorable results 



Unfavorable results 



Inconclusive results 



Unsatisfactory results 



Basic slag 

 Favorable results 



Favorable results 



Basic slag -\- lime — 

 favorable results 



Calcium hydroxide 

 and calcium 

 cyanamide 

 (Beka-Wurzelschutz) 



Unfavorable results 



Calcium hydroxide 

 and waste 

 (Herniol) 



Effective 



Good results 



Basic slag + lime — 

 effective control 



8-12 kg. per acre -|- lime 

 — good results 



Favorable results 



Favorable results 



Favorable results 



More or less unfavor- 

 able 



Unfavorable results 



Favorable results 



More or less unfavor- 

 able 



8-18 kg. per acre -f- lime 

 — good results 



Favorable results 



Haage's remedy has been found to be of little 

 value by Appel and Schlumberger (13) and Nau- 

 mann (13). 



Superphosphate fertilizer stimulates club root de- 

 velopment, according to Ravn ('10, '12), Osterwal- 

 der ('29) and Gibbs ('32). but McAlpine ('03) and 

 Flachs and Kronberger ('30) reported favorable re- 

 sults from its use. 



Jassen's remedy (calcium carbide dust and cal- 

 cium cyanamide) is ineffective, according to Miiller- 

 Thurgau and Osterwalder ('23). 



Saltpeter, superphosphate and potash as a combi- 

 nation fertilizer increases turnip yields, according to 

 Ravn (10). but also stimulates club root develop- 

 ment. 



Various kinds of ashes have also been tried as fer- 

 tilizers in relation to club root, with varvinij success. 



Lime, peat, and briquett ashes are effective accord- 

 ing to Ponkler ('96), Mathieu-Sanson ('97), Seel- 

 hoff ('12), K. M. ('19) and Straube ('22). Wood 

 ashes were reported by N. N. ('93), Massee ('96) 

 and Katterfeld ('23) to be effective against club root, 

 but Halsted ('96, '99) and Schlumberger ('14) 

 found them to be useless. 



The beneficial effects of alkaline fertilizers as con- 

 trasted with acid ones on club root has been shown in 

 experiments involving so-called complete fertiliza- 

 tion. Kindshoven ('21) succeeded in reducing infec- 

 tion from 30 per cent to 2 per cent by application of 

 an alkaline fertilizer consisting of calcium cyana- 

 mide, basic slag and 40 per cent jjotash at the rate of 

 50 gms. per sq. meter. Honig ('31 ) likewise got strik- 

 ing results in comparing the effects of alkaline and 

 acid fertilizers on infection of kohlrabi in pots of 

 heavily infested soil, as is shown below. 



