- 期刊
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亞洲玉米螟對含矽人工飼料之取食與利用
The Consumption and Utilization of Artificial Diet Containing Silica by the Asian Corn Borer Larvae
摘要
本文旨在探討亞洲玉米螟幼蟲不同含矽量人工飼料之取食與利用反應。以不含矽人工飼料養至第4齡和第5齡之玉米螟幼蟲，在0%、3%、5%、10%和20%等不同含矽量之人工飼料中測定其取食利用效率。結果發現供試幼蟲之消化能力（AD）隨飼料含矽量之增加而顯著降低，但消化食物轉換效率（ECD）則隨含矽量之增加而增加。如果自孵化後以不同含矽量人工飼料飼育，至第4齡和第5齡時，以原飼料測試幼蟲之取食利用效率。結果幼蟲之相對生長率（RGR）隨飼料含矽量之增加而顯著降低，而含矽飼料並有降低幼蟲相對攝食率（RCR）之作用。如果將以不同含矽量人工飼料飼育之第4齡和第5齡幼蟲，轉換至1%含矽量之飼料測定其取食利用效率時，幼蟲之相對攝食率即大幅增加，消化能力亦增加，但因食物轉換能力不佳，相對生長率仍然顯著降低。
並列摘要
The utilization responses of the larvae of Asian corn borer (Ostrinia furnacalis Guenée) to diets containing silica was illustrated in this investigation. The 4th and 5th instar larvae, reared in artificial diet without silica, were tested for estimating their utilization of artificial diets which contained different concentration of powdered silica. The silica in diets caused a decrease in digestibility (AD) of the larvae, but promoted their efficiency of conversion of food digested (ECD). If the larvae were reared on artificial diets containging different concentration of silica after hatch, the food utilization of the 4th and 5th instar larvae were estimated on the diet with the same concentration of silica. Relative growth rate (RGR) of the larvae decreased as the silica concentration in the diets increased. Besides, silica in diets significantly decreased the relative consumption rate (RCR) of the larvae. When the larvae were reared on diet containing high silica content (3, 5, 10, or 20 %) and then transfered to diet with 1 % silica at 4th and 5th instar, the larvae were unable to promote their relative growth rate by increasing relative consumption rate. A high content of silica in diets was indicated by this phenomena to be able to retard the corn borer larvae in efficiency of conversion of food digested.