8 PLANT-BUGS INJURIOUS TO COTTON BOLLS. 
The conch uela — Continued. p age . 
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 (Core idee) injurious to cotton 88 
Insects of the leaf-bug family (Capsidae) injurious to cotton 92 
Insects of the chinch bug family (Lygseidas) injurious to cotton 93 
Insects of the cotton stainer family (Pyrrhocoridse) 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 
