w. A. iiKidN. Tiii:_iiKVi;i,(H'\ii:\T or iiisi;asI': i;i:sista\ï \aiiii:tif.s m- ii.wts. -.':,.■ 



|)riiici|)al l'iicloi' iiiv(,)lv('il is lin- |ircs<'U((' ul' llic |i,ii:isil('. W'ill is Idiiiiil '\:< 

 scallered areas of iiTCij;iilai- si/c ami \'in-\u. wliidi oiilarge aniiually, as il h\ llic 

 spiTad ol' Ihe l'ungus llii'ii llir •-dil. Il i-^ uiicleniably carricd Irom one field lu 

 aiiolher by the siirl'ace walcr wliidi nins olV afler heavy rains. C.onspicuous 

 examples of dislribulion in stalde iiiaiiinc iiil'eclcd iVoni dispased [)laiils are on 

 rocord. In facl.'in oiir brceding of walcrmclons a t-oniposl of stable maniire 



'»- r.iTiMliiif; lirld (il' 1 i.hiiiil coUiin |il;iiileil willi |inij;i'My rows eiicli Irom Ihe seed ofaii indiMiliiMl phii 



Note dilleronce iii inliL'iiUince of wilt résistance. 



l' i^'- i- — llhaiiiii iioui- la sélcclioii du colon ■' r|)land " planté en rangs provenant iliacun 



(les ;;i-ainesdinie)j|anle individuelle — Observer la diMéreiice dans rin'rcdilédela résislance à la inahiili< 



wilh infecied melon plants was used in eacb hill lo secure a thoro and uiiiforni 

 exposure lo the disease. Afler infecied soils are slerilized Ijy beat, beallliy 

 plants may be grown. 



On Ihe other side of Ihe ([iieslion, a few facls are lobe opposed lo the fore- 

 going. I. W'ill occurs principally in sandy, sandy loam, and light alluvial soils. 

 Whyil is not prévalent in clay soils, we do not know. The same préférence 

 for sand is shown by the parasitic nemalode, Helc rodera radicicolo. i. The 

 closesl relatives of Fusariimi incliide inany saprophytic forms. 7>. The will 

 l'ungi Ibemselves grow luxuriantly as saprophytes on ail the common culture 

 média and remain in the soil for many years in the absence of their spécial 

 hosts. Thèse Ihings are not sufficiciil lo wcii^b againsi the other indications 

 of highly developed parasitism. 



/'iillun ]]'ilt. — Cotton wilt is w idely distiibuted in the coasial plain ofthe 

 soulhern United States fioni North (larolina to easiern Texas and Oklahoma. 



