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Message: <blockquote data-quote="imhotep" data-source="post: 25644304" data-attributes="member: 562115">I mentioned that the growers use systemic chemicals and place on the markets before even the half life has expired.. "Systemic" obviously means that these are absorbed by the plant tissues.In contrast there are topical pesticides. These could be washed off. There is no "uptake" by the plant.Pesticides do have a soil adsorption coefficient (usually microgram/g) and a half life (usually days). These guys will do anything to get a harvest. <img src="/styles/default/xenforo/smilies/default/sad.gif"  class="smilie" loading="lazy" alt=":(" title="Sad    :(" data-shortname=":(" /></blockquote>

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