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Root mealy bugs look just like normal mealy bugs and produce the same
white cottony substance, but feed exclusively on the roots, where they
can sometimes remain undetected until repotting takes place. They are
smaller than mealy bugs, whitish, covered in white waxy threads, and
very mobile, enabling them to spread to other pots. Root mealy bugs
can be eliminated by a very thorough washing of the roots, and a final
dip of the soil-free root ball in a solution of contact insecticide.
Especially some monadeniums seem sensitive to root mealy bugs.
Root mealy bugs |
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Roots of Monadenium stapelioides |
Roots of a Euphorbia squarrosa |
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