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本项工作的目的在于探求水稻三化螟Tryporyza incertulas(Walker)初孵幼虫在稻株上的定向特性,为鉴定水稻的不同生育期、品种植株间的抗螟性能做一些基本工作。其次,以人工合成的“稻酮”进行蚁螟趋化反应试验。工作系于1961—1964年进行。所得结果初步表明:1.在稻株上的定向部位:蚁螟侵入孔距稻株基部的相对高度为,分蘖期<10厘米;圆秆期10—20厘米,孕穗期后>30厘米。在生长期相同的植株上,籼稻>粳稻。入侵途径以叶鞘侧部的脉间蛀入为主,部分咬脉而入。2.蚁螟在分蘖期至圆秆期稻株上主动选择叶鞘部位入侵,并非由“向地性”所支配。3.蚁螟对各生育期水稻叶鞘组织的趋化反应与成虫的产卵选择性相吻合,即偏选分蘖期与孕穗期的稻株(或叶鞘)。4.在稻株叶鞘及孕穗穗苞内含有诱致蚁螟的物质,而在稻叶叶片组织内可能含有拒食作用的物质。5.蚁螟着生数量,在秧苗上为,17天秧>44天秧;在分蘖与圆秆期稻株上,籼稻>梗稻。6.一定浓度的人工合成“稻酮”能明显地引起蚁螟的嗅觉反应。
The purpose of this work is to investigate the directional characteristics of newly hatched larvae of the rice stem borer Tryporyza incertulas (Walker) on rice plants, and to do some basic work to identify the resistance to rice stem borers at different growth stages and varieties. Secondly, anthraquinone chemotaxis test was carried out with synthetic “rice ketone”. The work was carried out in 1961-1964. The results showed that: 1. Oriented sites on rice plants: ants borer invaded from the base of rice plant relative height, tillering period <10 cm; round stems 10-20 cm, booting after> 30 cm. On the same plants in the growing season, indica> japonica. Pathways of invasion to the side of the sheath of the intercostal spindle-based, part of the bite into the pulse. 2. Insect slips invade the leaf sheath at the tillering stage to the round-stalk stage, and is not dominated by “geotropism”. The chemotactic response of rice stem borer to leaf sheath of rice at different growth stages was consistent with the oviposition preference of adults, that is, the rice plant (or leaf sheath) at the tillering and booting stages. 4. Leaf sheaths and booting panicle in rice plants contain a substance that causes the ants beetle, while in the leaf tissue of rice leaves may contain antifeedant substances. 5. The number of ants inoculation on the seedlings, seedlings for 17 days> 44 days seedlings; tillers and round stalk rice plants, indica> stem rice. 6. A certain concentration of synthetic “rice ketone” can significantly lead to ants olfactory response.