. The more important fruit tree diseases of Ontario [microform]. Fruit; Pulvérisation et poudrage en agriculture; Spraying and dusting in agriculture; Fruits; Exploitations agricoles. white mould is very likely to develop around the edged of the spots. Thit toon eaniM a itotting, which markedly injures the fruit and makes it unpalatable. This u knoim as Pink Rot. Other rots such as the common storage rot, caused by blue moulds (Penicillium) and other fungi, also develop around scab spots on apples in storage. Such fruit is of course hnrd to market and can be sold only at a very much reduced pr
. The more important fruit tree diseases of Ontario [microform]. Fruit; Pulvérisation et poudrage en agriculture; Spraying and dusting in agriculture; Fruits; Exploitations agricoles. white mould is very likely to develop around the edged of the spots. Thit toon eaniM a itotting, which markedly injures the fruit and makes it unpalatable. This u knoim as Pink Rot. Other rots such as the common storage rot, caused by blue moulds (Penicillium) and other fungi, also develop around scab spots on apples in storage. Such fruit is of course hnrd to market and can be sold only at a very much reduced price. On the leaves Sculi first appears as small, somewhat circular, olive-brown spots, on one or both surface*, lliider weather condition" favourable to the fungus, these incntae in size, run iiitu eaih other and become brown or black, so that a con- siderable portion of the leaf is destroyed. In severe attacks the leaves become crinkled and to some extent curled. Sometimes they fall, but more frequently they remain on the trees. The Ii'HVts jiic the food factories of tlio trees. The food. Apple Scab on leaves. (Original.) manufactured by them used for the growth of the fruit, stem and roots, and for the formation of fruit buds for next year. Hence severe injury to the leaves by Scab impairs the vitality of the trees and prevents the normal development of fruit buds ani th'<8 may reduce the crop below the average the following year. twigs the Scab is very seldom noticed in Ontario. Sometimes, however, following a severe attack of Scab on tlip leaves and fruit the previous year, dead and blighted twigs may bo seen in spring on some of the trees. On the surface of such twigs elongated oiarks or fissures filled with i brownish-black powdery sub- stance can be observed. iTarieties of apples differ very much in regard to their freedom from Scab. It is a great help in controlling Scab to know iSomething regarding the suscepti- bility of the different ^"arietie8, as
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsprayinganddustingin
