B.C. Entomological Society. 



Where cultivated crops are being attacked in scattered localities, and 

 not by a general migration from the range lands, it is almost always due to 

 the fact that there are favourable breeding-grounds for the locusts in the 

 immediate vicinity. The places most often chosen for oviposition are 

 compact, firm lands, soft cultivated fields being avoided, as are also damp 

 localities. The favourite places are rough, dry roadsides, dry banks, old 

 dried-out pasture lands, and alfalfa-fields which have become hard and 

 baked owing to the lack of proper attention. In these places the locusts 

 will congregate for oviposition, and it will be from these places that the 

 swarms will migrate to destroy the alfalfa and other cultivated crops in the 

 immediate neighbourhood. 



Ploughing. — These fields if they are being used as breeding-grounds 

 should be ploughed up in the fall after the eggs have been deposited. This 

 will break the egg-capsules and bury them, so that very few locusts will 

 hatch out in the spring. If these places cannot be ploughed, a careful 

 watch should be kept on them in the spring, and as soon as the young 

 hoppers are seen to be emerging in large numbers control measures should 

 be started. Poison bait can be scattered, at any rate, along the side of the 

 ground next to the crops. A stream of water in an irrigation-ditch forms 

 an effective barrier to the hoppers while they are small. Once the locusts 

 become full-grown and are winged their control is more difficult. When 

 the locusts are winged they may still be poisoned, but it is done more 

 economically when they are younger and have not spread far from the 

 grounds where they were hatched. 



Hoppcrdoscrs. — Hopperdozers and hopper-catching machines are used 

 extensively in many parts of the United States for controlling the locusts, 

 both in the immature stages and also when they are winged adults. Hopper- 

 dozers were the first form of hopper-catching machines used and were 

 mostly home-made, and naturally varied considerably in structure, but the 

 description of one will serve for them all, as the differences were only in 

 size and material used, and the ultimate results were in most cases equally 

 efficient. 



" The hopperdozer consists of a galvanized-iron pan mounted on low 

 runners and having a backstop of canvas or sheet tin. The pan was usually 

 made about 12 feet long by 2 feet wide and about 4 inches deep. The back 

 and ends of the pan have a 2-inch flange, the front a 6-inch flange. This 

 pan is supported back and front by a 2- by 4-inch which is set into the 

 runners at either end, which are made of a 2- by 8-inch and are 4 feet long. 

 The flanges are nailed to this wooden frame. A runner in the centre helps 

 to strengthen the frame and support the pan. The hitch is made direct to 

 the runners. A backstop 30 inches high, with triangular pieces for the ends, 

 made of canvas or tin nailed on a frame, is held in position by allowing 

 cross-pieces of the frame to fit into bow-irons on the back of the pan-frame, 

 and this arrangement allows the backstop to be removed when not in use 

 or if the machine is to be loaded into a wagon for removal from field to 

 field. The pan when in use should have about 2 inches of water in it, 



