Figure 1. Seasonal activity of the yellow-poplar leaf-mining weevil in east-central Alabama, 1989-91. The shade section of each bar represents the major activity period for each stage. Unshaded portions represent a period of declining activity with weevil stages present only in low numbers. larvae and pupae present late in this latter period apparently did not reach adulthood; no new-brood adults were observed in the field beyond dates indicated.

Figure 1.
Seasonal activity of the yellow-poplar leaf-mining weevil in east-central Alabama, 1989-91. The shade section of each bar represents the major activity period for each stage. Unshaded portions represent a period of declining activity with weevil stages present only in low numbers. larvae and pupae present late in this latter period apparently did not reach adulthood; no new-brood adults were observed in the field beyond dates indicated.