Mechanical transmission of Xanthomonas campestris pv. mangiferaeindicae through insects.
Ram Kishun, Ramesh Chand
Author Affiliation: Indian Institute of Horticultural Research, 255, Upper Palace Orchards, Bangalore 560?080, India.
Indian Journal of Plant Pathology 7 : 112-114
Abstract : A total of 22 insect species, including 2 known to transmit X. c. pv. mangiferaeindicae, was collected from 2 mango orchards, one healthy and one infected with X. c. pv. mangiferaeindicae, and tested for presence of the bacterium. A bacterium closely resembling X. c. pv. mangiferaeindicae was found on culture media around the mouth parts and legs of Myllocerus dentifer, M. discolor var. variegata, M. undecimpustulatus var. maculosus, Persea lepida, Orthaga evadrusalis and legs of Camponotus compressus, C. sericus, Chrysocoris patricius, Drosicha mangiferae and Nezara sp. The bacterium was not isolated from the bodies of the insects. After inoculation with the bacterium typical X. c. pv. mangiferaeindicae symptoms appeared on mango leaves after 7 d. Disease developed after 15 d when all insects from the healthy orchard were released either after feeding on diseased plants or after passing on pure culture of X. c. pv. mangiferaeindicae.