224 



NEW YOKK STATE Ml"SEUM 



seems to jjossess a greater fondness for scale insects than our native species 

 and may. in the course of years, prove of some service in checking these 

 pests. 



A fungus; disease, S p h a e r o s t i 1 h a c o c c o p h i 1 a TuL, attacks this 

 pest, and in some localities it has killed a considerable number of the scale.s. 

 Prof. P. H. Rolfs credits this organism with practically exterminating the 

 pernicious scale in one Florida orchard and with reducing by considerable 



the numbers of the 

 l^est in others. It is 

 undoubtedly a native 

 of Florida, as it is verv 

 common on C h r v- 

 s o m p h a 1 u s ■ o b- 

 scurus Comst. This 

 fungus was cultivated, 

 and new colonies of 

 scales infested, but un- 

 fortunately, like other 

 fungi it is very depend- 

 ent on favorable cli- 

 matic conditions, and 

 this limits its usefulness 



Fi«. 3, Chines. l.dy bec.lc. Laner stages: „-seco„d larv:,l m..«c; /. cas. skin SerioUsK'. FuUgUS-iu- 



ot same; .-full grown larva; ^-pupawi.hin split larval ski,,;. „ewly cmer...d f^^^^^^ ^^.^^]^^ ^^.^,,.^. ^^^^ 





adult; y— same, fully colored; all enlarged to 

 Dep't Agric. Year Book 1903) 



Marlatt. V . S. 



to other states, and the 

 disea.se was at least temporarily estal:)!islu'd in several i)laces. After the 

 disease has consumed tiie insect, an orange c(.h)i-ed protuberance forms at 

 the base of the scale or breaks through it, but, as this is only from ' 40 to 

 yi inch in hight, it is not \er\- apjjarent. 



Remedial measures. Tiiis insect is very difficult to control because of 

 its exceeding prolihcac)', its resistance to insecticides, and particularly because 

 of its extended breeding season. It is a sucking insect and since it draws 



