亞洲玉米螟在施矽盆栽玉米植株上之為害與繁殖

Infestation and Reproduction of Asian Corn Borer on Slag-Treated Corn Plants

朱耀沂(Yau-I Chu) ； 洪淑彬(Shwu-Bin Horng)

《中華昆蟲》 11卷1期 (1991/03) Pp. iii+19-24

https://doi.org/10.6660/TESFE.1991003

摘要

在施矽及不施矽之盆栽輪生期玉米上，每株接種0.5、1或2個孵化前之玉米螟卵塊，1週後調查幼蟲之存活率及為害程度。結果顯示幼蟲存活率隨接種卵塊數之增加而降低。施矽植株上玉米螟幼蟲之存活率及為害程度均顯著低於未施矽者。以第4齡幼蟲接於施矽及不施矽之盆栽輪生期玉米時，現其蛀入率在兩者間並無顯著差異，但在施矽植株上之蟲孔數顯著少於未施矽者，且每植株上平均蟲孔長度亦較未施用者為短。因此施矽玉米莖確有阻礙玉米螟蛀入和為害之效果。取食施矽玉米植株之玉米螟，其雌蛹重顯著低於未施矽者，然雄蛹重差異未達顯著之水準。又取食未施矽玉米之螟蟲的繁殖力顯著高於在施矽玉米取食者，而所產卵之孵化率亦較高。因此，在施矽玉米植株上玉米螟之存活、為害和繁殖均較未施矽玉米植株為低。

關鍵字

亞洲玉米螟 ； 矽肥處理

並列摘要

The influence of slag and nitrogen fertilizer on feeding preference and damage by Asian Corn borer (ACB) larvae to corn crop were investigated with potted corn plants. Leaves,stems, sheaths or tassels at whorl and tasselling stages were sampled randomly in different fertilizer treatments for preference under free-choice condition. The results indicate that a decreased preference for slag-treated but an increased preference for heavy-nitrogen-treated plants. Slag-treated plants showed higher stem hardness . Leaf consumption by ACB on differently treated plants was negatively correlated with tissue hardness, but stem and sheath consumption by ACB were not significantly different among treatments. Consumption rate and the survival rate of first-instar larvae fed on leaves from slag-treated plants significantly decreased as larval density increased or as larvae were fed with shredded leaves. This showed that leaf hardness can be a factor in resistance to ACB.

並列關鍵字

Asian corn borer ； slag and fertilizer treatment