Foliar decay by Myndus taffini FDMT: new results

Julia J.F., . and Dollet M., . and Calvez C., . (1986) Foliar decay by Myndus taffini FDMT: new results. [Proceedings Paper]

This paper reviewed the research that had led to the identification of the Homoptera Cixiidae Myndus taffini as the vector or FDMT a wilt known only in Vanuatu where it only affected the introduced varieties but not the Vanuatu Tall VTT. Experiments on the number of adult M. taffini required for transmission of FDMT had shown that the symptoms could easily be obtained on young Malayan Red Dwarf MRD plantlets even after very short exposure or with very limited numbers of insects. These results seemed more favourable to the hypothesis of a causal agent of the viral type than to that of a mycoplasma-like organism or a toxin. Two trials using oxytetracycline chloride treatments of adult trees and plantlets showed no effect of the antibiotic and showed indirectly that FDMT was not caused by a mycoplasma-like organism. Studies on the susceptibility to FDMT of coconut crosses and cultivars performed directly in the field or after exposure to M. taffini in insect cages were reported and the practical difficulties encountered were described. A classification of different types of coconut according to susceptibility to FDMT was proposed subject to certain verifications. The results established before 1981 on the resistance of the Vanuatu Tall VTT and the tolerance of the cross with the Rennell Tall VTT x RLT were confirmed

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Abstract

This paper reviewed the research that had led to the identification of the Homoptera Cixiidae Myndus taffini as the vector or FDMT a wilt known only in Vanuatu where it only affected the introduced varieties but not the Vanuatu Tall VTT. Experiments on the number of adult M. taffini required for transmission of FDMT had shown that the symptoms could easily be obtained on young Malayan Red Dwarf MRD plantlets even after very short exposure or with very limited numbers of insects. These results seemed more favourable to the hypothesis of a causal agent of the viral type than to that of a mycoplasma-like organism or a toxin. Two trials using oxytetracycline chloride treatments of adult trees and plantlets showed no effect of the antibiotic and showed indirectly that FDMT was not caused by a mycoplasma-like organism. Studies on the susceptibility to FDMT of coconut crosses and cultivars performed directly in the field or after exposure to M. taffini in insect cages were reported and the practical difficulties encountered were described. A classification of different types of coconut according to susceptibility to FDMT was proposed subject to certain verifications. The results established before 1981 on the resistance of the Vanuatu Tall VTT and the tolerance of the cross with the Rennell Tall VTT x RLT were confirmed

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Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. SB267 I61 1984 Call Number
AGROVOC Term:	COCOS NUCIFERA
AGROVOC Term:	HOMOPTERA
AGROVOC Term:	MARCHITEZ
AGROVOC Term:	RESISTENCIA A LA ENFERMEDAD/ VECTORES
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:25
URI:	http://webagris.upm.edu.my/id/eprint/14375

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