The optimal temperature for the growth and development of storage insects is between 25 and 33 °C, and growth is slower when temperatures are outside this range (Fields, 1992). Over the three-month storage period, weather at the two experimental sites (Indiana and Arkansas) experienced starkly different temperatures, which resulted in differences in the final insect counts. In Indiana, a temperature above 27 °C was recorded on only one day and nighttime lows below 20 °C were recorded on 51 days. In contrast, Arkansas experienced only 13 nights with temperatures below 20 °C and 66 days with daytime highs above 27 °C. The highest temperature recorded in Arkansas was 34 °C, which was reached on seven days. As a result of these conditions, insects in the Arkansas bags were 34-times (woven bags) and 2-times (PICS bags) higher than in Indiana. The vast majority of the insects were weevil species. Throne (1994) found that maize weevil (Sitophilus zeamais) development takes about five weeks, suggesting that under optimum conditions about two to three generations of weevils could develop during the 12-week storage experiment. Throne (1994) also described the propensity of females to lay more eggs under optimal temperature and humidity, which was near ideal in Arkansas and reflected in the large number of insects in the woven bags. Insects found in the PICS bags after the storage period indicate that the initial grain contained weevil and beetle eggs. In Arkansas, where environmental conditions were optimal for development of these eggs into larvae and adult insects, the PICS bags reduced insect development by greater than 80-fold compared to development in the woven bags. Even in Indiana, the PICS bags controlled insect numbers more effectively than the woven bags. These results are in agreement with many studies that have documented the efficacy of PICS and other hermetic bags (Amadou et al., 2016, Baoua et al., 2014, Murdock et al., 2012, Mutungi et al., 2014, Njoroge et al., 2014).