Phyllosticta Leaf Spot Fruit Blotch And Canker of the Apple Its Etiology And
Phyllosticta Leaf Spot Fruit Blotch And Canker of the Apple Its Etiology And
Emil Frederick Guba
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552 BULLETIN No. 256 [February, The growers can save themselves much expense and unnecessary losses later in the fruiting period of the trees by carefully examining the young trees upon receipt from the nurseries and rejecting those which show evidence of cankers. The planting of healthy trees is strongly recommended and is most economical in the end. If the grower is not sure of obtaining blotch-free trees from nurserymen in the blotch area it may be wise for him to buy from nurseries in state...s where the disease is known not to exist. Selection and Location of Varieties It is imperative to select varieties which are bark-resistant, and to plant them at a distance from bark-susceptible varieties. Growers are divided in their opinions as to the selection of vari- eties, even among those seriously susceptible to fungi. In the central and western sections of the state, commercial growers still favor the Ben Davis in spite of the fact that all our serious apple maladies are common on this variety, blotch, blister canker, and scab being espe- cially so.
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