论文部分内容阅读
有害生物为害植物后可以诱导后者产生防御抗性,进而对同株植物上其它生物产生一定的负面影响。本文以蔬菜生产中的两大重要有害生物——南方根结线虫Meloidogyne incognita和烟粉虱Bemisia tabaci为研究对象,在实验室内,利用不同浓度(200头/株、500头/株、1000头/株)的南方根结线虫侵染番茄,分别在侵染后的第3、7、11 d接种烟粉虱,研究南方根结线虫为害番茄后诱导的植物抗性对叶部害虫烟粉虱生长发育及存活等特性的影响。结果表明,受三种浓度的南方根结线虫危害3 d、7 d和11 d后的番茄植株上,与对照植株上相比烟粉虱卵至成虫的发育明显延长;当500头/株和1000头/株浓度南方根结线虫危害3 d和7 d后,该番茄植株上烟粉虱的发育历期与对照相比差异达到显著水平,而在南方根结线虫危害11 d的番茄上,尽管烟粉虱发育历期也随接种南方根结线虫浓度的增加而延长,但处理组与对照组之间的发育历期均无显著差异。在南方根结线虫危害3 d、7 d后的番茄上接种烟粉虱,后者卵-成虫的存活率较对照组番茄上明显下降,且差异达到显著水平,而南方根结线虫不同为害时间、不同为害浓度的处理之间对烟粉虱存活率的影响差异并不显著。研究表明,当南方根结线虫与烟粉虱分别在根部和叶部为害同一株植物时,前者通过植物对后者的影响是负面的,二者之间的互作关系应属于拮抗类型。
After the pest injures the plant, the latter can induce defensive resistance, which in turn has certain negative impact on other organisms on the same plant. In this paper, Meloidogyne incognita and Bemisia tabaci, the two important pests in vegetable production, were used as experimental materials in this experiment. The effects of different concentrations (200 heads / plant, 500 heads / plant, 1000 heads /) Strains of M. incognita were inoculated on tomato, and B. tabaci were inoculated on the 3rd, 7th and 11th day after infection, respectively. The effects of plant resistance induced by Meloidogyne incognita on tomato on leaf pests Bemisia tabaci Growth and survival and other characteristics of the impact. The results showed that the development of eggs to adults of B. tabaci was significantly longer than that of the control plants on the 3rd, 7th and 11th day after being harmed by three root-knot nematodes. When 500 heads / plant and The developmental duration of Bemisia tabaci (Gennadius) on the tomato plants reached a significant level at the concentration of 1000 / plantlet root-knot nematode for 3 d and 7 d. However, on the 11-day- Although the developmental duration of B. tabaci was also prolonged with the increasing concentration of M. incognita, there was no significant difference in the developmental duration between the treatment group and the control group. Bemisia tabaci were inoculated on the 3rd and 7th day after the root-knot nematodes were harmed, but the egg-adult survival rate of the latter was significantly lower than that of the control group, and the difference reached a significant level. However, There was no significant difference in the survival rate of Bemisia tabaci between treatments with different detrimental concentrations. Studies have shown that when the root-knot nematode and the whitefly Bemisia tabaci damage the same plant roots and leaves, the former through the plant on the latter is negative, the interaction between the two should belong to the antagonistic type.