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Laboratory transmission of maize chlorotic mottle virus by three species of corn rootworms.


In greenhouse and lab. tests on the MCMV transmission by 3 Diabrotica spp. (D. undecimpunctata howardi, D. virgifera virgifera, D. barberi) no latent period was detected. There was no correlation between the presence of recoverable virus in or on the insect and its ability to transmit. No transovarial passage of the virus was detected. Larvae transmitted the virus from fresh material but not from dead plant residue. Infectious virus was not recovered from dead plant material held over the winter. The epidemiology and overwintering of MCMV cannot be readily explained in terms of the beetle-virus interaction.