. The agricultural gazette of New South Wales. Agriculture; Agriculture -- Australia New South Wales. 418 Agricultural Gazette of [Jf«y 2, 1908. tlie h()[)pei's, wliicli ina\' tlicu he (!• stroycd liy "il .•mil sodp spiiijs, l)iiiiiiii<^ over, or drajryinf:; a \oy^ tlii'ouyh the trenches. Spraying a 10-foot strip of the edge of the erop \\ itli an arsenic spray (say 1 Hi. arsenate of lead to 25 gallons of water) destroys a large percentage before tliey have done nmeh damage. Similarly poisoTied baits (bran 10 lb., arsenic I lb., with I lb. treacle, mixeil ^\\'y, and made into a
. The agricultural gazette of New South Wales. Agriculture; Agriculture -- Australia New South Wales. 418 Agricultural Gazette of [Jf«y 2, 1908. tlie h()[)pei's, wliicli ina\' tlicu he (!• stroycd liy "il .•mil sodp spiiijs, l)iiiiiiii<^ over, or drajryinf:; a \oy^ tlii'ouyh the trenches. Spraying a 10-foot strip of the edge of the erop \\ itli an arsenic spray (say 1 Hi. arsenate of lead to 25 gallons of water) destroys a large percentage before tliey have done nmeh damage. Similarly poisoTied baits (bran 10 lb., arsenic I lb., with I lb. treacle, mixeil ^\\'y, and made into a mash with water) can be used wilh good effect by scattering pellets along the edge of a . Corn-stalks, or grass, I'l'c., cut and soakeil in a strong arseinc solution also form efJ'ective baits. Care must be taken in the case of liaits and arsenic spi'ayingto prevent stock gaining access. The foliage ( f larksjmr (Delphiniinn) is fuhnd to poison locusts tliat feed on it., as also does the foliage of the castor-oil plant (Ricinus communis). Strips of fire, and even grass fires where able to be controlled, have been used over small ai-eas as a last resource to desti'oy dense swarms. The " hop)perdozer " is used about the breeding-grounds, in orchai'(k and young crops, etc. These can be nuide any size on the principle figured in Fig. G, and drawn by one or two horses. It consists in having a shallow iron. Fig. 6. " ; tray a')out 3 inches clt^ep, anything from (i up to K! feet wide, and '2 or .'5 feet from front to ba^k. At thf^ back a light framework bearing a cloth or light iron sci'een, as tigured, is needed. Blue oil or kerosene is poured into the tray, and the hopperdozer drawn to and fro through the swarm. Great numbers ai'e destroyed by hopping into the tray, or against tlie screen, from whence the}' fall into the oil. The dead ones soon accumulate, and the trav needs to be occasionally cleam^d out and fresh oil added. Nunibei's may hop ou
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