694: Geasses and Leguminous Crops in New Yoek 



caterpillar is about one-third inch in length, dirty white in color, 

 and is often tinged with greenish or orange. The caterpillar 

 reaches maturity in about a month and transforms into a small 

 brownish pupa within a silken cocoon in its burrow. A second 

 brood of moths fly during the latter part of July and a third 

 brood appears in Sej^tember. There are therefore three genera- 

 tions annually. The insect usually hibernates in the pupal stage. 

 Control. The principal injury to the seed crop is caused by 

 the second brood of caterpillars working in the green heads. Since 

 the flight of the second brood of moths occurs at the time when 

 the greatest number of clovei'-seed midges are on the wing, the 

 same measures will be found effective for the control of bt)tli. 



