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首页> 外文期刊>Journal of Economic Entomology >Diet pH, and Viscosity Affect Development and Survival of Screwworm Larvae (Diptera: Calliphoridae)
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Diet pH, and Viscosity Affect Development and Survival of Screwworm Larvae (Diptera: Calliphoridae)

机译：饲料的pH值和粘度对A虫幼虫（双翅目：Calliphoridae）的发育和存活的影响

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摘要

The effects of dietary pH and viscosity on larval development of the New World screwworm, Cochliomyia hominivorax (Coquerel) (Diptera: Calliphoridae), were studied in the laboratory using a gel-based and a cellulose fiber-based media. The mean initial pH of the standard gelled diet was lower (6.5 ± 0.3) than that of the standard cellulose fiber-based diet (6.8 ± 0.6). As larval development progressed, these values decreased to below 6.0 possibly due to the accumulation of acidic metabolic waste. Diets formulated with higher initial pH (7.5) produced a slightly larger and greater number of pupae compared with those for untreated standard diets. The diets with lower than normal initial pH (4.0) produced significantly smaller and lower numbers of pupae compared with those produced by the untreated standard diets. The effects of viscosity were studied using the cellulose fiber-based diet at six different initial viscosity levels ranging from 2,000 to 7,000 cP. The viscosity level of the diet increased as the larval development progressed due to gradual loss of moisture from the diet. The diet viscosity levels of 4,000 and 5,000 cP proved superior for larval development showing significantly higher yield and larger pupae compared with those obtained from diets with initial viscosities of 2,000-3,000 or 6,000-7,000 cP. The cellulose fiber-based diet used for mass rearing should be formulated to an initial viscosity reading of 4,000-5,000 cP for optimal larval growth and development. Adoption of a diet formulated to provide a higher initial pH such as 7.5 may produce better quality insects.
机译：在实验室中，使用基于凝胶和基于纤维素纤维的培养基，研究了日粮pH和粘度对新大陆螺虫Cochliomyia hominivorax（Coquerel）（Diptera：Calliphoridae）幼虫发育的影响。标准凝胶饮食的平均初始pH值低于（6.5±0.3），低于标准纤维素纤维饮食的平均pH（6.8±0.6）。随着幼体的发展，这些值可能降至6.0以下，这可能是由于酸性代谢废物的积累所致。与未经处理的标准日粮相比，初始pH值较高（7.5）的日粮产生的slightly的数量略多。与未经处理的标准日粮相比，初始pH值低于正常值（4.0）的日粮产生的smaller更小，数量也更少。使用纤维素纤维基饮食在2,000至7,000 cP的六个不同初始粘度水平下研究了粘度的影响。日粮的粘度水平随着幼虫发育的进展而增加，这是由于日粮中水分的逐渐流失所致。与初始粘度为2,000-3,000或6,000-7,000 cP的日粮相比，日粮的4,000和5,000 cP的日粮粘度水平被证明对幼虫发育更好，显示出更高的产量和更大的p。用于大规模饲养的基于纤维素纤维的饮食应配制成初始粘度读数为4,000-5,000 cP，以实现最佳的幼体生长和发育。采用提供更高的初始pH（例如7.5）的饮食可能会产生更好质量的昆虫。

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