BA(iS. 



78 



Fig. 91. 

 Bag with two upright bamboos. 



large stretches of grass land ; made smaller, say ten feet by two feet, it 

 can be run over a rice crop, over wheat, lucerne, mustard, etc. ; smaller 



still, it is attached 

 to the frame of 

 bamboos and a 

 single man draws 

 it between the 

 rows of crops, 

 along grass strips, 

 in any narrow 

 places. The sim- 

 plest pattern has 

 only two upright 

 bamboos to hold 

 open the sides; a 

 better one has four 

 bamboos, the two 

 cross ones with 

 projecting handles, 



and this pattern closes up automatically at the end of each sweep. 



The depth of the bag depends upon its use ; on the ground it may be 



five to seven feet deep ; but should be shorter for use on crops where 



has to sweep over the plants and not hang too much. At the end of .each 



sweep the bag is 



emptied into a hole 



in the ground ; 



where the insects 



are very active, it 



is twisted up to 



crush them and 



then opened. (See 



page 288, appen- 

 dix A.) 



In some cases 



it is desirable to 



smear the inside 



of the bag with 



kerosene oil, heavy 



oil or tar to catch 



the insects as they fly in ; a bag which is slightly moistened with kero- 

 sene is more effective because the kerosene at once kills many insects. 



Fia. 'J-2. 

 tSinall bag with two cross bamboos. 



