Question

When were phloem-limited bacteria first observed, and which disease did they affect in citrus plants?

A 1950; Peach phony disease Correct Answer Incorrect Answer
B 1970; Citrus greening Correct Answer Incorrect Answer
C 1980; Leaf scald Correct Answer Incorrect Answer
D 1990; Leaf scorch Correct Answer Incorrect Answer

Solution

Citrus greening. Phloem-limited bacteria were first observed in 1970 in citrus plants affected with greenurg disease.

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