. Better fruit. Fruit-culture. Pdgc Tii-ciili/-f()iir BETTER FRUIT May, 1922 Factors Inducing Calyx Spray Injury {Cont'mufd from page 7) tivation last year. The block immediately adjoining it had had continuous excellent cultivation. Both blocks \yere sprayed by the same man with the same strength of lime-sulfur. The improperly cared for block suffered from very severe leaf burn and leaf drop, while the other block dis- closed not the slightest trace of spray injury. There are other conditions that contri- bute to lime-sulfur injury that must be also mentioned because even the poorly cared tor
. Better fruit. Fruit-culture. Pdgc Tii-ciili/-f()iir BETTER FRUIT May, 1922 Factors Inducing Calyx Spray Injury {Cont'mufd from page 7) tivation last year. The block immediately adjoining it had had continuous excellent cultivation. Both blocks \yere sprayed by the same man with the same strength of lime-sulfur. The improperly cared for block suffered from very severe leaf burn and leaf drop, while the other block dis- closed not the slightest trace of spray injury. There are other conditions that contri- bute to lime-sulfur injury that must be also mentioned because even the poorly cared tor orchards escape serious spray burn in many seasons. One of these is the weather. After a period of long continued moist and cloudy weather apple foliage even on trees of good vigor is apt to be unusually sensi- tive to spray injury. The fact that such conditions prevailed to an unusual extent last spring will account, in part at least, for the very unusual and widsespread spray burn met with all over Western Oregon last year. In the average year this danger of ultra-sensitiveness is not to be expected; but when it does exist it is the vigorous and well cultivated trees that suffer the least. TN SEASONS like that of 1921, the con- -*-dition known as sulfur-shock is also far more evident than in the normal season. Sulfur-shock is the result of applying lime- sulfur spray on well developed foliage which has not been rendered resistant by earlier application of this material. It is particularly noticeable when the delayed- dormant and pink scab sprays have not been •ipplied and the leaves get their first lime- sulfur spray after the petals have fallen. At times it may be so serious as to cause a large part of the leaves to drop. While marked sulfur-shock may not occur in Ore- gon in the average season yet it is import- ant that the early spray should be given every year, not only for the resulting scab control, but as something of a protection against sulfur-shock in the later s
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