Jadam organic Farming & Gardening : The Way to Ultra-Low-Cost Agriculture, Make All-Natural Fertilizer, Pesticide and Microorganism Inputs Yourself

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, 
pesticide
and crops not getting along;
brown spots may form on edge of leaves or
fruits. Third, problem arising from 
mixture
with liquid fertilizer or chemical
pesticides. In first and second cases, you can check the existence of problem
after 2-3 days after testing. Third case is more difficult; it takes weeks to fi-
nally observe problems. Always take caution. 
How to mix pesicides
To make 500 L (132 gal) of pesticide, irst ill 300 L (80 gal) of water in the
container. Put in the ingredients (JWA, JS, JHS, etc.) one by one; stirring every
time you add one. Finally add water to make 500 L (132 gal) and stir once
again. If you mix undiluted JS and JWA together, there will be clotting. In cold
weather, ingredients tend to be slow in dissolving so mix more thoroughly. Al-
ways mix pesticide right before application and use it up; do not leave leftovers
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Natural Pesticides 
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for future uses. In particular, if the solution contains JS, if you use leftover
later, they easily create concentration stress. 500 L (132 gal) of pesticide can be
applied for an area of approx. 0.33 ha (0.8 ac). But this can vary greatly accord-
ing to plant size, planting space, etc.