Insects are important for humanity; play role in crop pollination, and biocontrol of harmful pests. The red palm weevil, Rhynchophorus ferrugineus, is a major pest of date palms and has become a serious threat. Scientists needs ample numbers of insects for bioassays to explore control options. The alga Spirulina platensis, is enriched by protein, natural vitamins, minerals, and amino acids, stimulate the development of organisms that feed on it. I assessed the value of Spirulina as a nutritional supplement for red palm weevil larvae by adding its various percentages to the artificial diet. Once a week, the larvae were removed from the containers, washed with distilled water, dried, weighed using an electronic scale, returned to a new container, and supplied with Spirulina mixed fresh diet. Larvae fed with lower concentrations showed vigorous growth and significant weight gain. Particularly, larvae fed 0.5%, 1%, and 2% Spirulina powder supplementation to their diet were healthier and gained more weight than larvae reared with >5% concentration. Overall 40% mortality was recorded in larvae fed with 10% concentration. Higher concentrations were lethal, and all larvae died within two weeks when fed 20% Spirulina. The present research findings indicate that Spirulina used in concentrations from 0.5% to below 5% had a beneficial effect on red palm weevil larval growth but a detrimental effect and even mortality was recorded when used ≥5%.

昆虫对人类很重要；在作物授粉、害虫生物防治等方面发挥重要作用。红棕象甲（ Rhynchphorus ferrugineus ）是枣椰树的主要害虫，已成为严重威胁。科学家需要大量昆虫进行生物测定，以探索控制方案。钝顶螺旋藻富含蛋白质、天然维生素、矿物质和氨基酸，可刺激以其为食的生物体的发育。我通过将不同比例的螺旋藻添加到人工饲料中，评估了螺旋藻作为红棕象甲幼虫营养补充剂的价值。每周一次，将幼虫从容器中取出，用蒸馏水清洗，干燥，用电子秤称重，放回新容器中，并提供螺旋藻混合新鲜饲料。用较低浓度喂养的幼虫表现出旺盛的生长和显着的体重增加。特别是，在饮食中添加 0.5%、1% 和 2%螺旋藻粉补充剂的幼虫比以 >5% 浓度饲养的幼虫更健康且体重增加更多。饲喂 10% 浓度的幼虫总体死亡率为 40%。较高浓度是致命的，喂食 20%螺旋藻后，所有幼虫都会在两周内死亡。目前的研究结果表明，螺旋藻的使用浓度在0.5%至5%以下对红棕象甲幼虫的生长有有益影响，但当使用浓度≥5%时会产生有害影响，甚至导致死亡。