papheteer
Well-Known Member
I read somewhere that the use of these systemics eventually retards the growth of plants. It says the chemicals remain in the plants very long after use. What's your experiences on this?
I read somewhere that the use of these systemics eventually retards the growth of plants. It says the chemicals remain in the plants very long after use. What's your experiences on this?
this is the whole point of systemics, the fact that they are distributed throughout the plant and remain there for a time to kill any pests that come along (or a new generation that hatches)
i have not seen them retard growth except it can sometimes delay flowering in Arabidopsis for a week or two
A while ago I used malathion to kill scale, mealy bugs etc... Didn't seem to hurt plant growth one bit. And it was taken up by the plants. The adjacent lemon tree got some around the base and over the next few days the bugs infesting it were all dead. The lemons, that ripened some weeks later, were delicious as always.
I think there can be an issues with chronic application... But some are definitely longer lasting than others. Most will come with a warning label advising how long you have to wait before you could eat any fruit/leaves of the plants after dosing. The shorter the time frame the faster it is cleared.
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