February, '19] CAFFREY: EUROPEAN CORN BORER 97 



Swiss Chard 



The stalk and midrib of the leaf of Swiss chard are commonly tun- 

 neled by the larvse. The injured leaves are very noticeable and are 

 ordinarily discarded in preparing the crop for market. There is a pos- 

 sibility, however, that recently infested leaves may pass inspection and 

 transport the pest to new areas. 



Beans 



The vines, immature seed and green pods of beans are tunneled by 

 the larvae of the European Corn Borer. The principal source of danger 

 from the pest attacking this crop consists of the possibility that ''string 

 beans" containing larvse of the species may be shipped to points out- 

 side the infested area. 



Beets and Spinach 



The tops of beets and spinach, or that portion of the plants com- 

 monly sold for greens, are sometimes infested by the pest. The larvae 

 tunnel in the stem and midrib of the leaf and frequently their injury is 

 of such a nature that it may be overlooked by the workmen handling 

 the crop, with the consequent danger of infested material being shipped 

 to localities not previously infested by the insect. 



Potatoes and Tomatoes 



The vines of potatoes and tomatoes are frequently tunneled by the 

 larvse of the European Corn Borer but ordinarily this is not a source of 

 danger in the possible dissemination of the species. 



Dahlias, Gladiolus and Chrysanthemums 



The stalks and flower stems of Dahlias, Gladiolus and Chrysanthe- 

 mums are frequently entered and tunneled by larva? of the European 

 Corn Borer. The injury to these plants is of such a nature that 

 infested stems generally wilt and break at the point where the larva 

 enters; but large stalks or stalks recently infested do not show any 

 conspicuous external indications of infestation and under certain 

 circumstances may be included in shipments of these plants to points 

 outside the infested area. 



Methods Adopted for the Control of the Insect and its Limita- 

 tion TO the Area now Infested 



It is evident that any measures looking toward the control of the 

 European Corn Borer and its limitation to the area now occupied must 

 consist of the destruction of the infested plants within that area, sup- 



