Agonopterix alstroemeriana alkaloids obtained from its host plant. They also have the advantage of local predators being less familiar with the species because they are non-native. The caterpillar may also benefit from the toxic alkaloids present in the poison hemlock host plant because they may increase the ability of "A. alstroemeriana" to recognize "Conium maculatum" as the correct location for oviposition. They pupate for 2 weeks in the soil, usually from late May to early June. The color of pupa is red-brown, with fine hairs densely located. The length of pupae is approximately 6–7 mm. After pupating, the moths emerge from the
U Should've Known Better song entered the "Billboard" Hot 100 chart, where it debuted at number 67 in the week of June 6, 2004, the second-highest debut of the week. "U Should've Known Better" remained twenty weeks on the chart, reaching its peak position of number 19 in its ninth week. It marked the second single from "After the Storm" to reach the top twenty on the Hot 100chart and, as the album's final single, would remain its second highest-charting offering behind leading single "So Gone." Although never released on a CD single or CD maxi single format, "U Should've Known Better" was also