. Better fruit. Fruit-culture. Tprp BETTER FRUIT Page 41 Comparative Results, Etc. Continued from page 5. The information procured from the standpoint of codHng-moth control dur- ing the past three years is also more or less irregular. Years that are favorable for scab development are usually unfa- vorable for the development of the codling moth. The information ob- tained in 1916 was practically nil. Gen- erally speaking but one generation of the worms appeared in the Hood River Valley that year owing to cold weather that prevailed practically all summer. During that season at harvest time bu
. Better fruit. Fruit-culture. Tprp BETTER FRUIT Page 41 Comparative Results, Etc. Continued from page 5. The information procured from the standpoint of codHng-moth control dur- ing the past three years is also more or less irregular. Years that are favorable for scab development are usually unfa- vorable for the development of the codling moth. The information ob- tained in 1916 was practically nil. Gen- erally speaking but one generation of the worms appeared in the Hood River Valley that year owing to cold weather that prevailed practically all summer. During that season at harvest time but per cent infestation was present on the unsprayed trees at the time the fruit was picked. (The first brood infesta- tion was not checked, apples from which dropped and decayed.) On the dusted block an infestation of per cent, or more than that observed on the dusted trees, was recorded, while no worms were found on the sprayed trees. The percentages are so small as to be within that allowed for experimental error and cannot be considered as reliable. In 1917 dusting work was continued in three different orchards. This sea- son proved a good one for codling-moth development, worms continuing active right up to picking time. The results obtained, however, in the final analysis are to a considerable degree contra- dictory. As indicated by the degree of infestation in the different orchards on the unsprayed check trees the crop of over-wintering worms was quite vari- able. During the season in checking up the worm injury both stings and actually wormy apples were tabulated, giving as a result total worm injury. In one orchard the unsprayed trees de- veloped per cent worm injury, per cent of the fruit being actually wormy and the balance stings. The fruit on the dusted trees, which was given six applications of arsenate of lead, developed a total worm injury of per cent— per cent of which was actually wormy. In the sprayer block per cent occurr
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