Annual report of the Fruit Growers' Association of Ontario, 1904 . cale, the Codling Moth,and the Tent Caterpillar have been very active; and, in some sections of On-tario, many crops were complete failures by reason of their ravages. Careful estimates of the probable losses have been made at difterent timesb;y competent scientific men, and the conclusion was that the annual loss wasabout one-tenth the total agricultural product of the United States andCanada. THE PEAE-TREE PSYLLA AND HOW TO DEAL WITH IT. By George E. iFiSHER, Burlington. Several instances of disastrous and even fatal effects
Annual report of the Fruit Growers' Association of Ontario, 1904 . cale, the Codling Moth,and the Tent Caterpillar have been very active; and, in some sections of On-tario, many crops were complete failures by reason of their ravages. Careful estimates of the probable losses have been made at difterent timesb;y competent scientific men, and the conclusion was that the annual loss wasabout one-tenth the total agricultural product of the United States andCanada. THE PEAE-TREE PSYLLA AND HOW TO DEAL WITH IT. By George E. iFiSHER, Burlington. Several instances of disastrous and even fatal effects to valuable pear or-chards from being attacked by the Psylla have come under (my observation,as well as entirely satisfactory results from treating the trees. The life-history and habits of injurious insects must be accurately deter-mined before we can know just how to deal with them. A knowledge of thehabits of such insects will often enable the farmer to so manage his land andcrops that the insects are placed under unfavorable and even destructive Fig 60.
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