PHARMACOSIDERITE, a mineral species consisting of hydrated basic ferric arsenate, 2FeAs04 Fe(OH)3.5H20. [Please select]
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Since they feed on foliage they can be very quickly destroyed by dusting or spraying the plants with a poison such as Paris green or arsenate of lead. [Please select]
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Since it feeds on liquid sap only it is impossible to kill it by spraying the crop with a poison such as arsenate of lead. [Please select]
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