Truzi Caio Cesar, Holzhausen Hurian Gallinari, Álvaro José Chamessanga, De Laurentis Valéria Lucas, Vieira Natalia Fernanda, Vacari Alessandra Marieli, De Bortoli Sergio Antonio
Department of Plant Protection, São Paulo State University, Jaboticabal, SP, Brazil.
University Center of Rio Preto, São José do Rio Preto, SP, Brazil.
J Insect Sci. 2019 Jan 1;19(1):12. doi: 10.1093/jisesa/iey138.
Helicoverpa armigera (Hübner) is an important pest of crops worldwide, and several studies have focused on the development of this species on different artificial diets. However, studies evaluating the insect's food consumption and utilization using nutritionally different diets are scarce. The aim of this study was to evaluate the biology and to compare the consumption and use of food by H. armigera larvae on diets with different protein levels provided by several dietary ingredients used in the diets. The nutritional index, the relative consumption rate, the relative metabolic rate, the relative growth rate, and the apparent digestibility were higher in the diet with higher than the optimum level of protein. On the other hand, the conversion efficiency of digested food was lower, resulting in a higher metabolic cost. In terms of biological aspects, larval survival was higher for the diet with optimal protein content and lower for the diet with a higher protein level. The pupal period was longer for the diet with a higher protein content, while pupal survival was lower. Among the evaluated diets, the diet with an optimal protein containing white bean 75 g, wheat germ 60 g, soy bran 30 g, milk powder 30 g, brewer's yeast 37.5 g as the protein sources resulted in a higher net reproductive rate, a shorter time for the population to double in number, and the highest rates of population growth. The results suggest that lower or higher protein contents in the diets of H. armigera negatively affect the biological aspects of this species.
棉铃虫（Helicoverpa armigera (Hübner)）是全球农作物的重要害虫，已有多项研究聚焦于该物种在不同人工饲料上的发育情况。然而，利用营养成分不同的饲料评估该昆虫食物消耗和利用情况的研究却很匮乏。本研究旨在评估棉铃虫幼虫的生物学特性，并比较其在含有不同蛋白质水平的饲料上的食物消耗和利用情况，这些饲料由饲料中使用的几种膳食成分提供。蛋白质水平高于最佳水平的饲料，其营养指数、相对消耗率、相对代谢率、相对生长率和表观消化率更高。另一方面，消化食物的转化效率较低，导致代谢成本较高。在生物学方面，蛋白质含量最佳的饲料幼虫存活率较高，而蛋白质水平较高的饲料幼虫存活率较低。蛋白质含量较高的饲料蛹期较长，而蛹的存活率较低。在所评估的饲料中，以75克白豆、60克小麦胚芽、30克大豆麸皮、30克奶粉、37.5克啤酒酵母作为蛋白质来源的最佳蛋白质饲料，其净繁殖率更高，种群数量翻倍所需时间更短，种群增长率最高。结果表明，棉铃虫饲料中蛋白质含量过低或过高都会对该物种的生物学特性产生负面影响。
