30 



COOPERATIVE MARKETING 



have not yet been solved, but all of these categories of 

 difficulties each year cause losses to the growers that mount 

 up into large figures. 



Perhaps a true conception of the growers' difficulties can 

 most vividly be presented by enumerating one only of the 

 foregoing categories of troubles, namely, the insect pests. 

 According to Professor Essig, the orange is host to the 

 following insects, truly a formidable array i^" 



angular winged katydid 



aspidistra scale 



Baker's mealy bug 



barnacle scale 



bean thrips 



black citrus plant louse 



black parlatoria 



black scale 



blue sharpshooter 



branch and twig borer 



bur clover or cowpea aphis 



California katydid 



California parsley caterpillar 



chafiF scale 



citrus mealy bug 



citrus red spider 



citrus white fly 



common termite 



cottony cushion or fluted scale 



cottony maple or vine scale 



destructive eledoes 



euonymus scale 



Florida red scale 



Florida wax scale 



frosted scale 



Fuller's rose beetle 



Glover's scale 



Gray's citrus scale 



green citrus plant louse 



green peach aphis 



greenhouse orthezia 



greenhouse thrips 



Harlequin cabbage bug 



hemispherical scale 



ivy or oleander scale 



Japanese or Mexican wax scale 



large vagrant grasshopper 



lesser shot hole borer 



long tailed mealy bug 



melon aphis 



Mexican katydid 



minute false chinch bug 



omnivorous looper 



orange chionaspis 



orange peel miner 



orange tortrix 



pernicious or San Jose scale 



purple scale 



Putnam's scale 



red scale 



rust mite 



soft brown scale 



spotted root fly 



tobacco flea-beetle 



two spotted mite 



variegated cup worm 



Western twelve spotted cucumber 



beetle 

 Western twig borer 

 wheat thrips 

 yellow scale 



^o Essig: "Injurious and Beneficial Insects of California," pp. Ivi-lvii. 



