Herbivore-induced plant volatiles play a vital role in mediating tri-trophic interactions among host plants, herbivores and herbivore natural enemies.

虫害诱导的挥发性物质在调节植物-害虫-天敌三营养关系中具有重要的作用。

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The Springboks play their three remaining Tri-Nations matches in South Africa -- the All Blacks in Cape Town on August 16 and then back-to back-matches against the Wallabies on August 23 in Durban and August 30 in Johannesburg.

CNN: Australia beat Springboks in rugby Test

After the two Tests with Wales on 26 May and 2 June, Australia play Fiji a week late before their first Tri Nations match in South Africa.

BBC: Wallaby Tuqiri out of Wales Tests

Zimbabwe travel to England to play in two Tests before taking part in a tri-nations one-day series against Hussain's men and the West Indies.

BBC: Tour ends in washout