Diseases of fruit and nut Diseases of fruit and nut crops in the United States in 1926 diseasesoffruitn52arch Year: 1927 12 1 Apple - Blotch unspr:;yod. bloaks,- a rusult v/hich indicates not only that the orfidication hr d boon successful but thnt there is vry little long distance spread of blotch by such agencies as wind, insects, or birds.' . ⢠Gardner (3) again reports the effectiveness of blotch crnker eradicrtion in two young apple of Oldenburg in which v/as demonstrated freedom from fruit infection in blocks of trees left unprotected by the blotch spirays during I9
Diseases of fruit and nut Diseases of fruit and nut crops in the United States in 1926 diseasesoffruitn52arch Year: 1927 12 1 Apple - Blotch unspr:;yod. bloaks,- a rusult v/hich indicates not only that the orfidication hr d boon successful but thnt there is vry little long distance spread of blotch by such agencies as wind, insects, or birds.' . ⢠Gardner (3) again reports the effectiveness of blotch crnker eradicrtion in two young apple of Oldenburg in which v/as demonstrated freedom from fruit infection in blocks of trees left unprotected by the blotch spirays during I925 and 1926. One of the orchards was set out in 1917» the- other in 1918. The cradic; tion campsign was begun in 12 2 nnd consisted of shaving off or pruning out the old cankers, and sprfiying to prevent tiio formation, of nev/ cankers. i''ig. 1. Distribution of apple blotch ii) the United States - revised to I'jZG. â . .
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