. Circular. Insect pests; Insect pests. 9 only place where its use will prove more or less impracticable will be on hilly or rocky lands or on that not j-et cleared of stumps. Poisoned haits.—Here again we have an inexpensive, practical way of dealing with these grasshoj)pers even when, as is frequently the case, they breed in the alfalfa fields and the protection, whatever it may be, must be applied there. What has come to be known as the " Criddle mixture " is giving most satisfactory results on the ranches of both the United States and Canada. The mixture is composed of half a bar
. Circular. Insect pests; Insect pests. 9 only place where its use will prove more or less impracticable will be on hilly or rocky lands or on that not j-et cleared of stumps. Poisoned haits.—Here again we have an inexpensive, practical way of dealing with these grasshoj)pers even when, as is frequently the case, they breed in the alfalfa fields and the protection, whatever it may be, must be applied there. What has come to be known as the " Criddle mixture " is giving most satisfactory results on the ranches of both the United States and Canada. The mixture is composed of half a barrel of fresh horse droppings in which is mixed 1 pound each of salt and Paris green. If the horse droppings are not fresh the salt is dissolved in water and mixed with the manure and poison. When this mixture is scattered freely about where the grasshoppers are abundant they seem to be attracted to it, for they devour it readilj^ and are poisoned thereby. Dr. James Fletcher, entomologist for the Dominion of Canada, cites an instance where. Fig. 8.—" ; A simple coal-oil pan, to be drawn by horse. (After Riley.) this mixture had been scattered freely around the edges of a field and states that this particular field stood out as a green patch in a brown plain, as it was situated in the midst of fields where nothing had been done to destroy th6 grasshoppers. This Criddle mixture now seems preferable to the poisoned-bran remedy that has given and still continues to give beneficial results, for it is less expensive than the latter and less likely to poison other animal life. COOPERATION. Cooperation between farmers or ranchmen is of the utmost im- portance, whether the hopperdozer or poisoned baits be used. On some of the more extensive ranches the owners can protect themselves by reason of the great extent of territory that is under the control of a single individual, but among smaller holdings cooperation is very essential. [Cir. 84]. Please note that thes
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