Lesion size latent period and sporulation on leaf discs as indicators of resistance of Hevea to Microcyclus ulei

Ismail H., . and Pereira J. C. R., . Lesion size latent period and sporulation on leaf discs as indicators of resistance of Hevea to Microcyclus ulei. pp. 56-65. ISSN 0127-7065

There were clonal differences in the rate of development of mycelium and appearance of lesions sizes of lesions latent period and the quantity of conidia produced on discs of Hevea leaves. There was a positive correlation between conidial production and lesion size and negative correlations existed between conidial production and latent period and lesion size and latent period. Latent period and sporulation are also important components for assessment of resistance. Clones GT711 RRIM 501 CNS AM 7701 SIAL 842 and SIAL 263 possessed relatively smaller lesions longer latent periods and reduced sporulation. On these clones the differences in lesion size were significant between clones but not between races of Microcyclus ulei. However differences in conidial production between clones races and the interaction between clones and races were significant.

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Abstract

There were clonal differences in the rate of development of mycelium and appearance of lesions sizes of lesions latent period and the quantity of conidia produced on discs of Hevea leaves. There was a positive correlation between conidial production and lesion size and negative correlations existed between conidial production and latent period and lesion size and latent period. Latent period and sporulation are also important components for assessment of resistance. Clones GT711 RRIM 501 CNS AM 7701 SIAL 842 and SIAL 263 possessed relatively smaller lesions longer latent periods and reduced sporulation. On these clones the differences in lesion size were significant between clones but not between races of Microcyclus ulei. However differences in conidial production between clones races and the interaction between clones and races were significant.

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Item Type:	Article
AGROVOC Term:	Hevea
AGROVOC Term:	Hevea rubber
AGROVOC Term:	Leaves
AGROVOC Term:	Clones
AGROVOC Term:	Microcyclus ulei
AGROVOC Term:	Inoculation
AGROVOC Term:	Lesions
AGROVOC Term:	Latent infections
AGROVOC Term:	Sporulation
AGROVOC Term:	Resistance to disease
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23521

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