120 



Annals of Horticulture. 



conclusions from results which have been obtained upon dif- 

 ferent soils, with different varieties which were planted at dif- 

 ferent times, and were treated with different kinds of manures. 

 Each case requires individual study, for all circumstances 

 must be taken into account. 



" It is scarcely necessary to mention the great susceptibility 

 to rot of some varieties, as Lilloise, for example, an i how 

 much the danger is increased by late planting, or by the use 

 of strongly nitrogenous fertilizers. The severity of the dis- 

 ease also varies with the character of the soil, those of a 

 lighter character being more free from the disease, the heavy 

 clay soils being most subject to attack ; but even upon the 

 sandy soils the disease is often severe. This is usually due to 

 the fact that they are moist, or that the dews are heavy ; for 

 under such circumstances the spores of the fungus germinate 

 rapidly. Shallow, sandy soils, which have a subsoil imper- 

 vious to water, lose most of their immunity from attack. If 

 complete successes can be cited in spite of all these unfavor- 

 able circumstances, the variety of potato, nature of the soil, 



Potato-rot i . • Tji" i ' j *ii i • -ii -i 



in Europe, and continuous rams, I trunk it will be impossible to attribute 

 them to any other cause than the applications of the fungicide. 



"Following are the figures regarding the Lilloise potato, 

 which is everywhere grown, and is considered of best quality. 

 The name of the grower is given in each case : 



Mr. Van Wildermeersch,of Bavichove. Soil good, two appli- 

 cations, June 15 and July 1 Gain 8,000 kilgr.*per hect.f 



Mr. Jacquart, of Dottignies. Soil clayey ; two applications, 

 June 30 and July 14 Gain 7,000 to 8,000 



Mr. Dooreman, of Burst. Soil heavy clay ; three applica- 

 tions, June 23 and July 9 and 28 Gain 8,287 " 



Mr. Landrieu, of Heurne. Soil, clay and sand ; two applica- 

 tions, at end of June and middle of July. Gain 8,700. . . " " 



If we consider the different- varieties, both old and new, the 

 results are about the same, as is shown by the following : 



Mr. Van Wildermeersch. Variety, Tonneliers; two applica- 

 tions, June 15 and July 1 Gain 9,000 kilgr. per hect. 



Mr. Vercampt, of Beveren. Soil, clay and sand; variety, 



Early Dunes, two applications, June 1 and July 14 



Gain 8,000 " 



*A kilogram is 2.2 pounds, 

 f A hectare is 2.47 acres. 



