234 



PHYTOPHTHORA MEADII n. sp. ON HEVEA BEASILIENSIS 



on the outside and the leaflets shrivelled and fell off. By the time the leaves 

 are wilting and falling, the hyphse have extended to a point from 3 to 4 centi- 

 metres beyond the attachment to the parent branch. These leaves that 

 fall off are not invaded by the fungus, as is proved by sectioning and by 

 incubation. Two examples which were examined in the month of April may 

 be taken. Figure 1 shows a section of a branch that had partially died back. 



>0£«P BRANCH Of U »9T v(aR(i3i5) 



NON-S£PTATC MVCEUUW 

 roUVOIN THt DC/ID BHAMCM 



WltTEO BRAHCH OF THt* YEAR 



AT THIS LEVEL BEHIMO THE BRANCH 

 ANQTMER WIUTED SHOOT EROSt 



WILTED BRANCH or THIS YCArOsi^) 



Discoloured area witm non-septate 



MYCtLlUM. 



NOM-SCPTATC MVCEUOM FOONOPOR 3 CM. 



FROM THE Place of in&ERTiow of Tnc BRANCH, 



BELOW THIS LEVEL MO MYCELIUM vVAS FOUND 



THt PRESENT YEARS BRANCHES BELOW THIS LEVEL 

 MAD GRttN HEALTHY LEAVES 



Fig. 2. Diagram shelving place -where the fungus passes 

 over the dry weather. 



