(A) 1-2 nymphs/leaf (
)
(B) 2-3 nymphs/leaf (X)
(C) 3-4 nymphs/leaf (X)
(D) 1 nymphs/leaf (X)
Answers: The economic injury level for white fly is 1-2 nymphs/leaf.
The economic injury level for white fly is________________?
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