. Bulletin. Plant diseases -- United States. COMPARATIVE DEVELOPMENT OF FRUIT BUDS AND SPURS. 101 ducing- those fruit spurs for the followino- year, while the unsprayed trees had ])()riie but few peaches. The facts here discussed are shown in the table that follows. Table 20.—Gain in number of spur buds on sprayed over unsprayed trees. Trees. Records. Length of old wood, in inches, on sprayed and unsprayed Total number of sp\irs Number of spur buds, estimated at 3 buds per spur Average number of spurs per inch Average number of spur buds per inch Gain in favor of sprayed tree
. Bulletin. Plant diseases -- United States. COMPARATIVE DEVELOPMENT OF FRUIT BUDS AND SPURS. 101 ducing- those fruit spurs for the followino- year, while the unsprayed trees had ])()riie but few peaches. The facts here discussed are shown in the table that follows. Table 20.—Gain in number of spur buds on sprayed over unsprayed trees. Trees. Records. Length of old wood, in inches, on sprayed and unsprayed Total number of sp\irs Number of spur buds, estimated at 3 buds per spur Average number of spurs per inch Average number of spur buds per inch Gain in favor of sprayed trees percent. Besides comparing the number of fruit buds produced in 1893 by the sprayed and unsprayed trees, it is desirable to contrast the bud- producing- al)ilities of the upper and lower portions of these trees. It is generally conceded as desirable that the crop of a peach tree should be borna as largely as possible upon the lower limbs, and anything tendino- to this result may prove of value. Peach leaf curl, ])eing due to a fungous parasite, has a tendency to do more injury to the lower than to the upper portions of the trees aflected. The atmospheric con- ditions are more favorable for the germination of spores and to fungous growth in the lower and more shaded portions of the tree, and the lower branches accumulate greater numbers of fungous spores than the upper branches. In the following table it is shown that the total number of fruit buds produced b}^ the lower limbs of the sprayed trees was 7 per cent greater than the number produced by the upper limbs, com- paring equal lengths of new wood in each case. On the unsprayed trees, however, the upper limbs produced 5 per cent more fruit buds per linear unit of new wood than the lower limbs. This shows a difference of 12 per cent in favor of the sprayed trees. The tabulated figures are as follows: Table 21.—Gain in total number of fruit buds on lower limbs of sprayed trees over those of unsprayed trees, as compared w
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