I III-. C( >\ I R( >L I »F [NSE< 1 PES! S < >F CROPS. 



93 



the light, clash against the glass ol the lamp-frame and fall into 

 the traj ol oil and water below this and arc suffocated by the oil. 

 W-ry large numbers ol insects are sometimes caught in this way, 

 especially on still, warm, dark, moonless nights. It i- usually nol 

 worth while to put out a lamp-trap on bright moonlight or wind) 

 nights. 



i Ol c;in.il. i 



Baits and traps for the attraction and capture of crop-pests are 

 so numerous ami various that no complete account ran Ik- attempt- 

 ed here. Many nocturnal caterpillars, crickets and other insects 

 which hide away in the daytime are often difficult to track down 

 and deal with but the) ma) sometimes be trapped by laying down 

 sods of turf, planks, etc. in likely places and these may if 

 required be baited tow .mis e\ ening with tender shoots (e.g. lucerne) 

 and examined next morning lor the pi ; insects. Special 



or the attraction and destruction of certain noctuid moths 

 by the dissemination of the smell of a liquid have been introduced 

 of late years and have been found highly successful in No 

 India in ial case; but such means are not within the reach 



■ ordinary agriculturist. 

 The trenching ol fields and smaller ana- such as seedb 

 a simple and efficient method for assisting in tin- exclus 

 creepinj such as caterpillars, which may otherwise invade 



A small furrow ol even a tew inches breadth and depth 

 will often check the inroads "t sui I insei ts it the inside 

 the trench is vertical and composed of fairl) loose -oil. 



