Protectants applied to grain can reduce damage caused by insect feeding during storage. Although these protectants are effective against many external feeders, they may also reduce damage caused by internal feeders as they often interact with the exterior surface of the grain during their larval or adult stages to feed or oviposit. For this study, we investigated impacts of Storicide® II applied to brown rice on three different internal feeders: Rhyzopertha dominica (Fauvel), Sitophilus oryzae (L.), and Sitotroga cerealella (Olivier). We also investigated the effects of this protectant at three different temperatures and when it was combined with different percentages of untreated brown rice. Time-series clustering was also performed to determine whether treatments caused disruptions to the timing of progeny emergence. Overall, R. dominica was the most susceptible as mortality and knockdown were observed in mixtures containing 10% treated brown rice. In contrast, S. cerealella was the least susceptible as mixtures containing at least 50–75% treated brown rice were required to reduce progeny production. However, lowering the temperature to 22 °C did reduce the amount of treated brown rice required to reduce progeny emergence and also reduced the number of progeny that emerged synchronously, which would likely reduce mating and reduce population levels over time. Similar effects on progeny were observed for S. oryzae and R. dominica. Overall, these findings suggest that Storicide II can reduce population levels of internal feeders and that combining this protectant with cooler temperatures can provide additional protection.

谷物上使用的保护剂可以减少在储存过程中昆虫喂食引起的损害。尽管这些保护剂对许多外部饲养者有效，但它们也可以减少内部饲养者造成的损害，因为它们在幼虫或成年阶段经常与谷物的外表面相互作用以进食或排卵。在本研究中，我们调查了应用于糙米的Storicide®II对三种不同内部进料器的影响：Rhyzopertha dominica（Fauvel），Sitophilus oryzae（L.）和Sitotroga谷类菌（奥利维尔）。我们还研究了该保护剂在三种不同温度下以及与不同百分比的未经处理糙米组合使用时的效果。还进行了时间序列聚类以确定治疗是否引起后代出现时间的中断。总体而言，多米尼加罗非鱼是最易感的，因为在含有10％处理过的糙米的混合物中观察到死亡率和击倒率。相反，谷类链球菌是最不易受感染的，因为需要至少含有50％至75％处理过的糙米的混合物以减少子代产量。但是，将温度降低到22°C确实减少了减少后代出苗所需的经处理糙米的量，并且还减少了同步出苗的后代数量，这很可能会减少交配并随着时间的推移降低种群数量。米链霉菌和多米尼加菌对后代的影响相似。总体而言，这些发现表明，杀菌剂II可以减少内部给料器的数量，并且将该保护剂与较低的温度结合可以提供额外的保护。