The toxicity test indicated that of all 9 species of plant, the substances extracted from Chelidonium majus, Radix angelica dahurica , Pulsatillae Chinensis, Veratrum dah uricum Loes.

通过对林木害虫毒力测定结果表明：9种天然杀虫植物中白屈菜、兴安白芷、白头翁、兴安藜芦、白藓、走马芹粗提物杀虫效果较好。

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But despite all the concerns about the speed of the preparations for the World Cup, Mr Loes says it will act as catalyst for Brazil's greater infrastructure development.

BBC: Brazil: Will it be ready for the World Cup?

"Sao Paulo is an international airport but it has only two terminals but has a population of over 20 million people - it's ridiculously badly served, " says HSBC bank chief economist for Latin America, Andre Loes.

BBC: Brazil: Will it be ready for the World Cup?