INSECTS. DISEASES, REMEDIES 69 



and the twelve-spotted cucumber-beetle (Diabrotica 12- 

 punctata). These all have been found doing damage 

 on beans. However, the bean plants may be protected 

 largely by a dusting of air slaked lime. In the case of 

 garden beans and in a commercial way, Bordeaux to 

 which has been added poison will prove effectual. 



Corn Ear worm (Heliothis armiger), often known 

 as the boll worm will not infrequently bore holes into 

 pods and seeds of maturing beans. It is a species of 

 wide distribution and destructiveness. Fig. 21 gives 

 an idea of this creature in its relation to the bean 

 plant. Poisons cannot always be depended upon foi 

 a remedy as applied in form of spray. Thorough 

 applications of Paris green, either in the form of a 

 spray or dry powder will doubtless kill the young 

 caterpillars. Late fall plowing is of great value in 

 ridding infested fields of the worms. These are best 

 combated, however, by bait composed of bunches of 

 clover grass or weeds poisoned by dipping into a 

 solution of arsenic or Paris green. A mash of bran 

 poisoned in a similar manner and scattered around 

 the bases of the vines is also effectual. The salt 

 marsh caterpillar is sometimes injurious to beans. 

 It is amenable to the use of arsenites. 



Bean Leaf rollers (Eudamus proteus), a cater- 

 pillar often called roller-worm which has proved very 

 destructive in Florida, is ordinarily injurious to legu- 

 minous plants particularly beans in the gulf states. 

 It is the larva of a butterfly called the swallow tail 

 skipper. The ground color of the larva is yellowish, 

 its head dark and marked with two orange spots near 

 the mandibles. The head is prominent and separated 

 from the body by the narrow neck, a characteristic 

 which serves to distinguish it from any other common 



