Do a concentration test:
There is no pesticide that is free from concentra-
tion problem. Even water, when given too much, will harm the plants.
Whenever you apply a new pesticide, do a concentration test in a small spot
to make sure it is safe; and then extend the application to the whole field.
Sometimes there can be weak wetting and clotting of pesticides which cause
concentration stress. The spot with the droplet is where mark is left and
where there is a strong concentration. Water is extremely important. Concen-
tration problem comes in a few different forms. First,
uneven coating
result-
ing in higher concentration in various spots (marks will be left on those
spots) and thus causing partial concentration problems. Second,
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