Results
 The mean numbers (+SE) of adult and nymphal bigeyed bugs on each sample

 date in each soybean field sampled in 1985 and 1986 are shown in Figs. 1 and

 2, respectively. Overall precision of the sampling program, as determined by

 the SE values, was excellent. The SE was rarely over 25% of the mean except

 when populations were very small. Populations of bigeyed bugs were present in

 all soybean fields during most of the growing season. Nearly all of the

 bigeyed bugs in all fields was G. punctipes, but G. uliginosis was noted in

 very small numbers (i.e., < 5% of total).

 Adults were first detected in the fields during middle to late vegetative

 soybean growth stages. The size of adult populations at this time was never

 great. Usually, nymphal populations appeared about a week or two later. Both

 adult and nymphal populations then were present in substantial numbers during

 the rest of the growing season in all but one of the fields. Adult and

 nymphal populations did not occur in large numbers in that field until late in

 the growing season. In nearly all fields, generational cycles were indicated

 by peaks in nymphal populations ca. every 30 days. There was considerable

 overlap between the generations in all fields, because the number of bigeyed

 bugs rarely declined greatly in magnitude. Population size was small in the

 1985 Henry Co. and 1986 Dallas Co., Alabama fields, compared to the other

 fields sampled in this study. The drought may be the reason for the lower

 populations in 1986 Dallas Co., Alabama field.

 Population size varied among fields, but population trends were similar.

At least 3 complete generations occurred, with additional partial generations

also present. The number of bigeyed bugs increased through the growing

season, with numbers usually greatest on the last or near the last sample

date.