Biodiversity of Plant Pathogenic Fungi - Kerala Forest Research ...
Biodiversity of Plant Pathogenic Fungi - Kerala Forest Research ...
Biodiversity of Plant Pathogenic Fungi - Kerala Forest Research ...
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forest ecosystems studied, forest plantations registered the highest fungal species<br />
diversity indices (Table 15); about 106 fungal pathogens were found causing various<br />
diseases in this ecosystem. Among the host plants, exotic species were found most<br />
vulnerable to these fungal pathogens at their different growth phases.<br />
Table 15: Species richness and diversity indices <strong>of</strong> plant pathogenic fungi in the forest plantations<br />
No. <strong>of</strong><br />
study<br />
plots<br />
Menhinick’s index (R2) Margalef’s index<br />
(R1)<br />
Simpson’s index Shannon index<br />
(H’)<br />
19 5.665241 17.697342 0.0228204041 4.102671<br />
Table 16: Fungal species abundance in the forest plantations<br />
Sl. No. Abundant fungal species No. <strong>of</strong> host plants<br />
affected<br />
% to total<br />
1 Guignardia sp. 21 6.23<br />
2 Colletotrichum gloeosporioides 19 5.63<br />
3 Glomerella cingulata 18 5.34<br />
4 Phomopsis sp. 17 5.04<br />
5 Coniella fragariae 14 4.15<br />
6 Corticium salmonicolor 12 3.56<br />
7 Alternaria sp. 12 3.56<br />
8 Pestalotiopsis maculans 12 3.56<br />
9 Cylindrocladium quinqueseptatum 10 2.96<br />
10 Curvularia sp. 10 2.96<br />
11 Lasiodiplodia theobromae 10 2.96<br />
12 Guignardia citricarpa. 10 2.96<br />
Among 106 fungal pathogens recorded from this ecosystem, common fungal pathogens<br />
like Guignardia sp., Colletotrichum gloeosporioides, Glomerella cingulata, Phomopsis<br />
sp., etc. showed abundance. Of the nine species <strong>of</strong> Cylindrocaldium recorded, C.<br />
quinqueseptatum was found the most virulent as well as predominant fungal pathogen in<br />
this ecosystem. Similarly, among various species <strong>of</strong> Coniella, recorded from the forest<br />
plantations, C. fragariae was the most abundant species (Table16). Corticium<br />
salmonicolor, the most dreaded canker pathogen was also found abundant in forest<br />
plantations affecting both indigenous as well as exotic plantation species.<br />
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