Journal of Animal and Plant Sciences
J. Anim. Plant Sci. [ISSN 2071 - 7024]
Volume 6 (1): 567 - 570. Published February 25, 2010.
The status of three common leaf disease of Para rubber in Nigeria
Ogbebor, O. Nicholas
*Plant Protection Division, Rubber Research Institute of Nigeria, PMB 1049, Benin City.
*Corresponding author E-mail: - ogbeb06@yahoo.com
SUMMARY
The status of three common leaf diseases of Hevea brasiliensis Muell. Arg. (Bird’s eye spot, Colletotrichum leaf fall and Corynespora leaf fall) was studied in six local clones (NIG 800, 801, 802, 803, 804, and 805) and three exotic clones (PR107, RRIM 707 and GT1). The study was carried out in a 40ha clonal garden at the Rubber Research Institute of Nigeria (RRIN), in a randomized complete block design. Each clone was replicated four times with 462 trees per experimental unit. The plant spacing was 3.34m X 6.7m. Incidence of Corynespora leaf fall disease was highest with disease index ranging from 26.19 – 40.19, while Colletotrichum leaf fall incidence was least (7.61 – 17.91). RRIM 707 clone had the highest disease indices for Corynespora leaf fall and Bird’s eye spot infection, while NIG 803clone was most affected by Colletotrichum leaf fall disease. This study suggests adequate control of the leaf diseases is necessary to forestall an epiphytotic situation where latex yield could be adversely affected
Key words: - Hevea brasiliensis, Folial disease, disease severity, clonal garden.
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