We must take precautions while spraying Insecticidal powder . [Please select]
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The procedure consists in most cases in spraying the affected plants with poisonous solutions or emulsions, or in (lusting them with fungicidal or insecticidal powders, or applying the fumes of lethal gases. [Please select]
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The application of greases and insecticidal liquids by hand is fairly effective and practicable in cases in which there are only a few animals to be treated. [Please select]
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