New alternatives for the evaluation of oil palm genotypes for their resistance to bud rot disease caused by Phytophthora palmivora

Martinez Gerardo, . and Velez Diana Carolina, . and Cristian Norena, . and Varon Francia, . (2013) New alternatives for the evaluation of oil palm genotypes for their resistance to bud rot disease caused by Phytophthora palmivora. [Proceedings Paper]

Bud rot in oil palm caused by Phytophthora palmivora is the most important disease of the crop in Colombia and neighbouring countries. The search for genotypes with resistance to the disease is needed for the development of disease control programs. This work presents the results obtained in the search of strategies for natural infection with the establishment of an 85 shade house with high relative humidity provided with a mist system where not only it was used the inoculum potential of P. palmivora in the area of Tumaco NarifJo because it was complemented with the inclusion of bud rot disease palms in the perimeter and in the central part of the experimental plot. The average temperature was 25C and relative humidity was above 85. The shade was 4m above the soil. The plants used in this test came from a mass selection program of surviving plants from the bud rot epidemic in an area where more than 30 000 ha of oil palms planted in the area were destroyed. The selected six-eight months old nursery palms at the beginning of the experiment were planted side by side with bud rot susceptible Elaeis guineensis palms. Under these conditions it favored the infection and disease development in susceptible palms. Ten months after the beginning of the evaluation it was possible to observe a 32 incidence in a susceptible genotype in evaluation when the control plants presented an incidence of 40. At the same time in the other plot there were no cases of the disease in another material in evaluation when its control presented an incidence of 42. During the development of the trial the severity increased constantly in the susceptible materials. These results are an interesting advance in the development of killing fields for testing oil palm germplasm in an early and accurate manner. The difference observed in some of the material evaluated showed more or less similar incidences in susceptible materials compared with the absence of diseased palms in one of the promising materials indicating that this is a procedure that should be tested even further.

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Abstract

Bud rot in oil palm caused by Phytophthora palmivora is the most important disease of the crop in Colombia and neighbouring countries. The search for genotypes with resistance to the disease is needed for the development of disease control programs. This work presents the results obtained in the search of strategies for natural infection with the establishment of an 85 shade house with high relative humidity provided with a mist system where not only it was used the inoculum potential of P. palmivora in the area of Tumaco NarifJo because it was complemented with the inclusion of bud rot disease palms in the perimeter and in the central part of the experimental plot. The average temperature was 25C and relative humidity was above 85. The shade was 4m above the soil. The plants used in this test came from a mass selection program of surviving plants from the bud rot epidemic in an area where more than 30 000 ha of oil palms planted in the area were destroyed. The selected six-eight months old nursery palms at the beginning of the experiment were planted side by side with bud rot susceptible Elaeis guineensis palms. Under these conditions it favored the infection and disease development in susceptible palms. Ten months after the beginning of the evaluation it was possible to observe a 32 incidence in a susceptible genotype in evaluation when the control plants presented an incidence of 40. At the same time in the other plot there were no cases of the disease in another material in evaluation when its control presented an incidence of 42. During the development of the trial the severity increased constantly in the susceptible materials. These results are an interesting advance in the development of killing fields for testing oil palm germplasm in an early and accurate manner. The difference observed in some of the material evaluated showed more or less similar incidences in susceptible materials compared with the absence of diseased palms in one of the promising materials indicating that this is a procedure that should be tested even further.

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Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. SB608 O27M939 2013 Call Number.
AGROVOC Term:	Oil palm
AGROVOC Term:	Elaeis guineensis
AGROVOC Term:	Plant disease control
AGROVOC Term:	Rots
AGROVOC Term:	Phytophthora palmivora
AGROVOC Term:	Genotypes
AGROVOC Term:	Germplasm
AGROVOC Term:	Resistance to disease
AGROVOC Term:	Disease incidence
AGROVOC Term:	Infection
Geographical Term:	MALAYSIA
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 05:15
URI:	http://webagris.upm.edu.my/id/eprint/13220

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