996 EXPERIMENT STATION RECOKD. 



At harvest tlie tubers were weighed and the weight of sound and 

 scabbed potatoes ascertained. The author's conchisioiis as to the value 

 of the treatment as shown by his experiments are as follows : 



"Potatoes soaked in, and sprayed in the open rows with, quarter-strength corro- 

 sive sublimate gave a larger yield and a lower per cent of scab than did either of the 

 belts treated with half and full strength solutions of the same compound. .'Similar 

 results followed the treatment of seed potatoes with quarter-strength Bordeaux 

 mixture. 



"Although there was but little apparent difference in value between corrosive 

 Bublimate and Bordeaux mixture, the former is considered preferable on account of its 

 being more easily prei^arod, and as it is of a uniform strength throughout admits of 

 a much greater quantity of potatoes being treated at one time than does the Bordeaux 

 mixture, which soon settles unless stirred. 



"The cutting of the 'seed,' before soaking in Bordeaux mixture, showed very 

 emphatically the importance of applying the fungicide to the uncut potatoes and 

 preparing them afterwards for planting." 



Experiments with beans (j)p. 24-30). — Two crops of Golden Wax beans 

 were grown in the last series, the object being to test different strengths 

 and times of application of fungicides. Based on the results of his 

 experiments with the beans, the author concludes that — 



"Soaking bean seed in either full, half, or quarter-strength Bordeaux mixture 

 does not prevent anthracnose. 



"Spraying the vines with full-strength Bordeaux mixture or full-strength ammo- 

 niacal copper carbonate every 10 days is a partial preventive of anthracnose and 

 bacterial blight, aud when applied to the seedlings within a few days after their 

 first appearance and repeated at intervals of 5 days is an almost complete pre- 

 ventive. 



"Half-strength Bordeaux mixture and half strength ammoniacal copper car- 

 bonate gave equally good results as leaf fungicides, aud are preferable to the full 

 orquaiter-streugth solutions of either of the above compounds. As fungicides they 

 are as effective as the stronger solutions, and, unlike them, do not injure the vines. 

 The quarter-strengtli solutions are less effective as fungicides." 



The formulas for the fungicides used and methods for their preparation 

 and application are given in detail. 



Notes on finger and toe (club root) of cabbage and allied plants, 

 G. Massee {Proc. Roy. Sue, 57 {1895), No. 344, pp. 330-332).— The 

 author briefly refers to the observations of several authors on the 

 disease of crucifers caused by Plasmodiophora brassicw and gives an 

 account of some experiments conducted by himself. He found (1) that 

 in addition to cultivated plants, several weeds belonging to the order 

 Cruciferce are attacked by Plasmodiophora. Hence the necessity of 

 preventing the growth of such weeds in fields, etc. (2) That the germs 

 of disease remain in the soil and retain their vitality for at least 2 years. 

 (3) The development oi Plasmodiophora is favored by the j)resence of 

 acids and checked by the presence of alkalies, in this agreeing with 

 fungi rather tlian bacteria. (4) For the purpose of sterilizing infected 

 soil, experiments prove that either a dressing of lime or a manure con. 

 taining potash salts is effective, the last being most valuable, as it not 

 only destroys the germs in the soil but arrests the disease in seedling 



