Potato Scab And Potato Rot

Experiments made last season at the RhodeloHrid station, as reported by The Horticulhixist, demonstrated that the product áoru potatoes planted upon recent! - ] ' wed sward land without f ertilizer í ) necessarily exempt from the ib. The disease may exist in a and not sericrasly injure the erop. Fresh or partly decomposed seaweed scattered in the furrows at the time of planting did not increase the disease; scattering it over the seed potatoes after they were dropped in the furrows slightly checked its development. On the contrary, stable manure scattered over the seed potatoes after they were dropped tended to a large increase of scab. Covering horse manure lightly with earth when used in the furrows at the time of planting produced a less per cent of scabby potatoes than when scattered over them. Spraying the vines with Bordeaux mixture during their growthslightly checked the development of scab, and spraying the seed potatoes and the soü above them, after they were dropped in the furrows, had much the same effect in fields not previously contaminated with the disease. Applications of Bordeaux mixture made July 20, andrepeated July 29 and Aug. 8, checked the spreading of potato "blight" and "rot" to such an extent that all the varieties treated formed good sized and well matured tubers practically free from the disease. As compared with untreated plots, the yield of merchantable tubers of four varieties gave an average increase in the yield of merchantable potatoes due to the application of Bordeaux mixture of 53.26 bushels per acre.