Disease screening of family PB 5/51 X IAN 873 with race 1 and race 2 of Corynespora cassiicola

Safiah Atan, . (2007) Disease screening of family PB 5/51 X IAN 873 with race 1 and race 2 of Corynespora cassiicola. [Proceedings Paper]

Corynespora leaf blight occurs through out the year and affects both mature and immature leaves. The severity of the disease is influenced in part by the susceptibility of the rubber clones. In a susceptible clone infection with C. cassiicola will result in complete defoliation and the affected tree becomes stunted. It has been shown that different races exist within C. cassiicola and are classified as Race 1 and Race 2. Race 1 of the pathogen was found to infect the earlier Hevea clones e.g. RRIM 600 and Race 2 infects the newer clones e.g. RRIM 2020. This paper will discuss the screening of family PB 5/51 x IAN 873 against Race 1 isolate CSB 16 and Race 2 isolate CLN 16 of C. cassicola. Leaf-disks were used as a standard method of disease screening at LGM in which both immature and mature leaves were simultaneously assessed. The data were collected for a period of seven days and analyzed using ANOVA. The results of these experiments will be discussed in this paper and recommendations made.

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Abstract

Corynespora leaf blight occurs through out the year and affects both mature and immature leaves. The severity of the disease is influenced in part by the susceptibility of the rubber clones. In a susceptible clone infection with C. cassiicola will result in complete defoliation and the affected tree becomes stunted. It has been shown that different races exist within C. cassiicola and are classified as Race 1 and Race 2. Race 1 of the pathogen was found to infect the earlier Hevea clones e.g. RRIM 600 and Race 2 infects the newer clones e.g. RRIM 2020. This paper will discuss the screening of family PB 5/51 x IAN 873 against Race 1 isolate CSB 16 and Race 2 isolate CLN 16 of C. cassicola. Leaf-disks were used as a standard method of disease screening at LGM in which both immature and mature leaves were simultaneously assessed. The data were collected for a period of seven days and analyzed using ANOVA. The results of these experiments will be discussed in this paper and recommendations made.

[error in script]

Item Type:	Proceedings Paper
AGROVOC Term:	CORYNESPORA CASSIICOLA
AGROVOC Term:	HEVEA
AGROVOC Term:	CLONES
AGROVOC Term:	LEAVES
AGROVOC Term:	TISSUE ANALYSIS
AGROVOC Term:	PLANT DISEASES
AGROVOC Term:	MALAYSIA
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:27
URI:	http://webagris.upm.edu.my/id/eprint/15701

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