spider mite
US /ˈspaɪ.dərˌmaɪt/
UK /ˈspaɪ.dərˌmaɪt/
1.
a tiny arachnid, typically red or green, that feeds on plants and can be a serious pest in agriculture and horticulture
:
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The farmer discovered a severe infestation of spider mites on his tomato plants.
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Organic pesticides can be effective in controlling spider mites.