8 PLANT-BUGS INJURIOUS TO COTTON BOLLS. 



The conchuela — Continued. Page. 



Natural control 62 



Weather influences 62 



Parasites attacking eggs 62 



Parasites attacking adults and nymphs 64 



Predatory enemies 64 



Artificial control 67 



Preventive measures 67 



Field measures 68 



Hand-picking 68 



Other methods of collecting bugs from cotton plants 72 



Contact insecticides 72 



Trap crops and attraction to lights 72 



The grain bug {Pentatoma sayi Stal) 73 



Pentatomid bugs of the genus Euschistus 74 



Pentatomid bugs of the genus Nezara 78 



Pentatomid bugs of the genus Thyanta 84 



Other Pentatomids frequenting or attacking cotton 87 



Insects of the squash-bug family (Coreidse) injurious to cotton *. . 88 



Insects of the leaf -bug family (Capsidse) injurious to cotton 92 



Insects of the chinch bug family (Lygseidse) injurious to cotton 93 



Insects of the cotton stainer family (Pyrrhocoridae) injurious to cotton 94 



Methods of control for general application 98 



Farm practice and cultural methods 98 



Direct methods of combating plant-bugs in cotton fields 99 



Index. : 101 



