Remedies.

When it is ascertained that the grubs or larvae of the hop cone fly are doing mischief to the plant-centres, dressings of lime, soot, lime ashes, or of sawdust or ashes steeped in paraffin oil should be put as closely as possible round them.^* It is important to prevent the development of the flies, as there is no remedial measure that can be applied when these have established themselves in the cones.