The Online Gardener's Handbook
Chapter 8: Appendix
How to use Metric Equivalents
Table of Contents
- Measuring the surface area and length of
- Measuring the volume of water
- Measuring liquid insecticides and fungicides
- Measuring dry pesticides
- Learn More
Since January 1, 1981 all pesticide labels give directions in metric
measurements only. The easiest way to change over to this new system
is to make your measurements also in metric. This may seem difficult
but it is really quite simple as long as you have the proper tools
for it. You thus avoid having to calculate the conversions from
imperial to metric measurements.
Measuring the surface area and length
of row: For treatment of lawns and for soil insects in
vegetables and flowers you have to know the surface area in square
metres; for row crops, such as onion, you need the length of row
in metres. Take a long stick or slat and cut it to the length of
one, two or three metres (1 metre = 40 inches), depending on the
size of your garden and your own preference. Now you have a handy
measuring stick and you should forget about yards and feet.
Measuring the volume of water: The
second tool you need is a plastic pail for preparing spray mixtures.
At the levels of one, two, three, four, five, six and seven litres
(1 litre = 35 fluid ounces) make marks on the inside of the pail
with paint or a waterproof felt marker. To avoid other uses mark
on the outside of this pail "Insecticides, fungicides only".
Measuring liquid insecticides and
fungicides: You also need a tool for measuring liquid pesticides
from the bottle or can. A tablespoon holds 15 mL and a teaspoon
holds 5 mL. These well-known spoon measures can still be used for
the metric system. Many product labels also give the rate in spoonfuls.
Measuring dry pesticides: Many
manufacturers state the recommended rate for wettable powders and
granular products by volume instead of by weight. Hence the tablespoon
(15 mL) and the teaspoon (5 mL) can be used. Keep in mind that level
spoonfuls and not heaped spoonfuls should be used. If some product
labels give the rate by weight in grams, you can also use spoon
measures because the level tablespoon equals about 15 grams and
the level teaspoonful equals about 5 grams.