We assessed the performance of hermetic triple layer Purdue Improved Crop Storage (PICS) bags for protecting Hibiscus sabdariffa grain against storage insects. The major storage pest in the grain was a bruchid, Spermophagus sp.. When we stored infested H. sabdariffa grain for six months in the woven polypropylene bags typically used by farmers, the Spermophagus population increased 33-fold over that initially present. The mean number of emergence holes per 100 seeds increased from 3.3 holes to 35.4 holes during this time period, while grain held for the same length of time in PICS bags experienced no increase in the numbers of holes. Grain weight loss in the woven control bags was 8.6% while no weight loss was observed in the PICS bags. Seed germination rates of grain held in woven bags for six months dropped significantly while germination of grain held in PICS bags did not change from the initial value. PICS bags can be used to safely store Hibiscus grain after harvest to protect against a major insect pest.

中文翻译：

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三重袋密封技术，用于控制储存的木槿籽粒中的 bruchid (Spermophagus sp.)（鞘翅目，Chrysomelidae）

我们评估了密封三层普渡改良作物储存 (PICS) 袋的性能，用于保护木槿谷物免受储存昆虫的侵害。谷物中的主要储存害虫是食精虫属。当我们将受感染的 H. sabdariffa 谷物储存在农民通常使用的聚丙烯编织袋中六个月时，食精虫的数量比最初增加了 33 倍。在此期间，每 100 粒种子的平均出苗孔数从 3.3 孔增加到 35.4 孔，而在 PICS 袋中保持相同时间长度的谷物的孔数没有增加。编织对照袋中的谷物重量损失为 8.6%，而在 PICS 袋中未观察到重量损失。编织袋中放置6个月的谷物种子发芽率显着下降，而PICS袋中放置的谷物种子发芽率与初始值没有变化。PICS 袋可用于在收获后安全储存芙蓉谷物，以防止主要害虫。