MuNG tk&ni 



iti) 



Tlic moths lay their eg-g-s also 



Fig. 168. 

 Saii'if C'a(erj)illar. {Ilagnijied twice.') 



on wild plants, breeding" particularly 

 upon leguminous plants. There are 

 several broods in the year, the tirst 

 in March or April, the second in 

 June or July, when the bulk of the 

 caterpillars are found on the sann 

 plants. 



The great safeguard against 

 these pests lies in clean cultivation, 

 thus affording- them no food-plants 

 at times when sann hemp is not 

 available. It is also possible to 

 collect the clusters of eggs and the 

 newly hatched caterpillars if a 

 sharp watch is kept when moths 

 are seen in the field. Nothing can 

 be done to a crop that is once 

 badly affected except to spray lead 

 arseniate. 



Sann is also attacked by a small 

 brown flea beetle, which eats holes 

 in the leaves ; the beetle does little 

 harm but it is likely to be thought a 

 serious pest. 



Other Pests of Leguminous Crops. 



Muug {Pkaseolus nmngo) is attacked by the caterpillars of the 

 moth * figured, which eat 

 into the base of the pods 

 and destroy the seeds ; the 

 caterpillar remains within 

 and eats seed after seed 

 until it is full fed, when it 

 pupates in the ground. 

 This form of damage is 

 very characteristic and the 

 pest easily found. It is as 

 yet doubtful how far this 

 pest occurs generally, as it 

 has not been commonly 



Fig. 169. 

 Muug Motli. (Magnified.) 



^ 2'61.3Iarucafeiiulalis. Gey. (PyralidsD.) 



