. Bulletin. Agriculture -- New Hampshire. One of the toughest resisters to scientific warfare has been the squash bug. Even he is yielding to new sprays developed in the Station s study of contact insecticides Particular interest has focussed during recent years on the sequence of studies of contact insecticides. Because of increased governmental restrictions on fruits and vegetables sprayed with arsenicals, there has been need for more accurate information regarding oils and other types of spray materials. A new technique for determining the effectiveness of such insecticides has been worked
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. Bulletin. Agriculture -- New Hampshire. One of the toughest resisters to scientific warfare has been the squash bug. Even he is yielding to new sprays developed in the Station s study of contact insecticides Particular interest has focussed during recent years on the sequence of studies of contact insecticides. Because of increased governmental restrictions on fruits and vegetables sprayed with arsenicals, there has been need for more accurate information regarding oils and other types of spray materials. A new technique for determining the effectiveness of such insecticides has been worked out, and was re- cently termed by a famous English toxicologist one of the most fun- damental contributions to the subject yet made. Ten different bulle- tins dealing with various phases of the study have already been published. Now the attack is being carried forward into the held of insect eggs.. Complete studies of the apple maggot, running over many years, have es- tablished significant facts about this distinctive pest, including the discovery that it is able to hold over in the ground for two years 415>. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. New Hampshire Agricultural Experiment Station. [Hanover, N. H. ] : New Hampshire Agricultural Experiment Station