VKNTUKIA. 



219 



placed them in the genus Venturia. Hi- investigation- are, 

 however, not quite complete. 



Tin- scah or lihick spot of apple and pear i- a v.-ry familiar 

 disease in America and elsewhere. It attacks leave-, youn.u 

 shoots, and fruits. J)irty ureeni-h -pot- appear tir-t. then enl,n_- 

 ing, they run together, and darken in colour till alino-t Mack. If 

 the attack occur on voun- folia-e. it may lie dwarfed and killed : 

 the newly-formed 1'ru it will in such cases ! attacked, shrivel 

 up, and fall. If the attack he deferred till the folia-e and fruit 

 are well advanced, then spotting ie-ults and the fruit remain- 

 hard, perhap- cracks. The e.midia are oval, unicellular, and 

 yellowish-brown; they are produced from -hoit 



I . 107. I'- i fon ro w ri spots 01 



:i|']'l'-; tln"-i- ^till in tin i.-.irlii-i i i'li it> ii. 



111'.' ciiln n -li"\\> two ri'W- "I ! 



-tn.lu:i .if ji^u'|iliil:irclU-liyi: 



(v. Tubeuf ! 1 i 



with wart\ prominence^ \\hich -ro\\ mi -pot> nf leaf ,,) fruit 

 i I . In7). The perithecia (aa yel described) ai-e di-iiu-ui-hed 

 l.\ hlaek bristles -urroundinu ihe pon-. and occur on fallen 



leaVl The a:-ci c,,|ilaill ei-lll 'Jlcclii-ll oVoid -pule- \\ilh lS\o 



01- three cell.-. 



Iii addition tu the injurv in Leaves and destruction of \i,unu 



fniii, llie di-li'_:uratioii nf ihe apph-- i- a cause of cmi-iderahle 

 monetary lo hilute I'-mdeaiix or copper -ul|-haie mixtuie 



ajpplied hefi.re the opeiiin- of hud- and once m iwice afti-r 



