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Show BORDEAUX INJURY OF FRUIT Much of Trouble May Be Avoided If Proper Attention Is Given to Certain Cer-tain Important Factors. (By W. J. MOORE.) Bordeaux mixture, some of the pre- . pared brands of lime-sulphur, and to a less extent, home-cooked and self-boiled self-boiled lime sulphur spray, may produce pro-duce a russeting of apples. Experience Experi-ence at the Maine station has shown lhat bordeaux mixture is more likely to produce spray injury than most of ; the lime-sulphur sprays now on the market. Bordeaux Injury first appears . as small, regular, black or brown spots ; K ... ... Spray Injury on Fruit. ... ' scattered over the apple, but more frequently on those parts which re-ceived re-ceived the most spray. These spots ' '" differ from those caused by the apple scab fungus in that they are more regular and are not sunken. As the ... apple grows these spots are replaced , by russeted blotches. In severe cases . the fruit may become distorted, irreg-, . ular and sometimes cracked.. Much of the injury from bordeaux "" may be avoided if proper attention, is ' given certain factors which have more or less to do with its occurrence. Too -strong bordeaux should not be applied a 3-3-50 mixture, is recommended.-The recommended.-The lime should be of good quality ; 1 and approximately equal . parts of j lime and copper sulphate should be ' used. ..''",, Never pour concentrated solutions together equal and full dilution of the milk of lime and copper solutions -' should be made before mixing. Cover -the fruit and foliage with a fine mist," but do not apply sufficient mixture to ; : . cause the trees to drip. - Do not spray during rainy, foggy or damp weather. Study susceptibility of varieties. Some varieties of apples are almost immune from bordeaux injury," and others are Injured but slightly, while some other varieties are badly injured. Those varieties which are known to be susceptible sus-ceptible to this injury should not-.be. sprayed with bordeaux mixture after the leaves begin to unfold. - Spotting of the leaves ' is closely associated with the russeting of the fruit by spray. However, a study of Sprayjnjury on Leaves, ' " this trouble 'extending over several vears at the Maine station, shows that . leaf spot, inthat section, at least," is "' by no means confined to that caused ' by the use of sprays, as some fungous diseases may cause - leaf-spot on 3prayed and" -unsprayed trees. - In many; sections of the country, , , Missouri, New York, Arkansas, Ore-Son, Ore-Son, New Hampshire, reports indicate " that no injury is sustained by the use-1 ' Df self-b611ed, home-cooked . lime-sul- - " phur spray-.- In some other states in-., lury from ithis source has been found. However, .here is every reason to be-' lieve that it may be used on the more tender varieties with much less dan- 5er of injury than with bordeaux mix-, cure. It is probable that. the combined com-bined use' of the two would yield the more satisfactory results. That is, for . ihe susceptible varieties, use bordeaux mixture for the first spraying, before the leaYes unfold, and follow- this-with this-with lime-sulphur for the later spray- II RS. --. : - ... . |