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… towards greater intensification, they become increasingly vulnerable to attack by pests and diseases. Consequently, one … acts may include prohibiting the planting of disease-prone species and varieties; prescribing preventive disinfection; … biological control by introducing animal and plant species which are useful in combating plant pests; …

… layer. (2) Utility in the management of non indigenous species which are pests of plants (such as some invasive … The F-ratio relative to the within unit mean square is vulnerable to the confounding of treatment and unit effects, … USA alone, four million jobs depend on forests that are vulnerable to the ALB. The IPPC introduced ISPM 15: 2009 …