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ARS Home » Research » Publications at this Location » Publication #121844
Title: INTERACTION OF CITRUS BACTERIAL CANKER, CITRUS LEAF MINER AND PEST MANAGEMENT.

Author
item BELASQUEZ, J. - FUNDECITRUS
item PARRA, A.L. - UNIV. OF SAO PAULO
item CHAGAS, M.C.M. - UNIV. OF SAO PAULO
item AYVES, A.J. - FUNDECITRUS
item PARRA, J.R.P. - UNIV. OF SAO PAULO
item Hartung, John

Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: 8/24/2001
Publication Date: 8/24/2001
Citation: Belasquez, J., Parra, A., Chagas, M., Gouin, C.C., Ayves, A., Parra, J., Hartung, J.S. 2001. Interaction of citrus bacterial canker, citrus leaf miner and pest management.. Phytopathology.

Interpretive Summary:

Technical Abstract: Citrus bacterial canker disease is more difficult to control in the presence of the citrus leaf miner, Phyllocnistis citrella, and the number of infection foci that required eradication increased from 45 to 433 following the introduction of this insect in Sao Paulo. We set up microcosms containing susceptible plant material, the insect, and the pathogen to study their interactions. When leaves containing leaf miner larvae or pupae were inoculated with the pathogen, infection rates of nearly 100% were obtained, more than twice the infection rate observed with uninfested leaves, and the area of the lesions was dramatically increased as well. We also set up experiments to determine if adult leaf miners that emerged from canker-contaminated galleries transmitted the pathogen by oviposition. We did not detect transmission of the pathogen by oviposition. Horticultural oils and soaps are often used to control insects and mite infestations in orchard situations. We observed that treatment of sweet orange leaves with commercial products at labelled rates dramatically increased the susceptibility of the foliage to infection by Xanthomonas axonopodis pv. citri.