Research Articles: "Doc2b is a high-affi nity Ca 2+ sensor for spontaneous neurotransmitter release" by A. J. Groffen et al. (26 March, p. 1614). Several author affi liations were not footnoted properly; three corrected affi liations follow.
In this area, improved drainage will help the corn to grow steadily and will help the land operators to destroy the billbug host plants. The breaking on this tract was done the year before the first crop was planted, which was good. Summer breaking gives the quickest results in destroying billbug host plants. If they are completely destroyed before winter, any surviving billbugs will leave, and corn can safely be planted the following spring. Where the destruction of host plants is only partial, the planting of corn will be attended with such losses that a diversity of crops not susceptible to billbug injury, such as pumpkins, turnips, melons, flax, cotton and beets, might and probably would be more profitable. Such crops planted in rows and cultivated would allow as rapid destruction of the host plants as would corn. Usually billbug injury ceases to be serious after the second crop has been produced on new land where the host plants have been abundant. These losses, however, may be eliminated completely or may cover several years, depending directly upon the time the host plants are completely destroyed. MR. E. G. KELLY: Have you found the larvre of this insect in corn? MR. A. F. SATTERTHWAIT:No. The injury to corn that I have found was caused by the adult.
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