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be met by the industry under presentday conditions. One cannot help but marvel at the rapid development and improvement that has taken place in spray, chemicals, equipment, and methods of applying sprays in recent years. These changes have come about because of the great need for letter insect and disease control, for more accurate timing,, faster spraying, more uniform and thorough coverage with less labor, and to meet the ever growing demand for larger annual yields of fruit that has desired size, color, and finish.
Spraying costs have reached an all time record high- It is the writer s opinion that from now on it should be possible to do something in the direction of bringing these costs down. One reason for this line of thought is that spraying problems have not appeared in bunches but as individual problems, making it nec% essary to put concentrated effort on one particular thing which in most cases has been to develop a material which would lie specific—in the case of insects, for the control of one insect. For example, Parathion came into use as a miticide. At present at has l>een found that it is an effective material for a large number of. insects. There are many such examples. For instance, up until the late twenties, growers had no satisfactory amtrol for rosy aphis. Then came the tar-oils and later the dinitro chemicals ,whiph made positive control of rosy aphis possible.
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