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| Villareal, S. | 1999 | Leafhopper control by insecticides in not the solution to the tungro problem. | In: Chancellor, T.; Azzam, O.; Heong, K. editors. Rice tungro disease management. International Rice Research Institute. Manila, Philippines. |
| Wagner, Georg. | 2004 | Vegetables' pests. | Personal Communication. Schopperplatz 14, 4082 Aschach / Donau. |
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