As with soil-based gardens, hydroponic plants require good
pest and disease maintenance controls. Failure to do so creates
the same results as with 'ordinary' gardens (i.e. spindly or
dead plants). Since the majority of hydroponic plants are fruits
and vegetables, that means the plants are not worth eating.
However, managing the hydroponic garden is even trickier, since
disease and pests have it much easier in this setting. Plants
are continuously kept wet, either immersed in water ('true'
hydroponics) or continually sprayed (aeroponics) or reside in a
permanently wet medium such as perlite or sand. Fortunately, as
with soil-based gardens, there is an large array of available
methods to manage the problem.
Control Pests and Diseases
Using beneficial life forms is one popular way to
control unwanted pests, including certain types of bacteria and
fungi. These can help to control spider mites and other invaders
by crowding them out, eating them or releasing compounds toxic
to the pest. They're known as beneficial organisms because they
do all that without damaging the plants themselves.
Different types of pesticides are available, too. Pesticidal
soaps have been in use for centuries and still provide effective
and non-toxic ways to keep the pests down. One category called
botanicals are compounds released by plants themselves that have
been combined into an easy-to-use pest control method.
Botanicals break down naturally from exposure to air and water
and are brilliant because they leave no harmful chemicals
behind.
Neem oil can control over 400 different types of pests that
commonly invade gardens, including hydroponic ones. A simple
spray to the leaves can often eliminate common pests. The bugs
absorb the oil, which limits their ability to reproduce, leading
to a lower population. For more serious infestations, many
commercial pesticides continue to work well.
White flies, aphids, mites and other pests can be a problem in
hydroponic settings, just as in soil-based gardens. Powdery
mildew is common. In fact, because of the continual moisture
bugs and pests have a 'friendly' environment. Making it
'unfriendly' is straightforward enough, using fungicides and
organicides. Sulfur-based compounds can help control white
flies, mealy bugs, thrips and more.
Pyrethrum continues to be a safe and effective means of control.
Though it sounds man made it is actually derived from flowers.
This class of natural compounds released by plants are extracted
and used in many commercial insecticides. Dosage is low, so the
compound is very safe when used correctly (always read the
label). Azatrol is a broad spectrum insecticide that provides
another easy control method over most common pests.
Hydroponic gardeners have to exercise additional care when using
any disease or pest control method, though. Since no soil is
present to hold on to the roots, it's easier to damage a plant
when manipulating the leaves and stems.
That means that if you pick off mites by hand - an effective
method for low-number infestations - it's important to exercise
extra care.
Since moisture is present, mildew and other fungi are more
common in hydroponic gardens. Keeping leaves dry and just the
roots wet will help. Any insecticide sprayed on to your plants
or vegetable should be allowed to dry under the grow lights. For
aeroponically grown plants, for example, that may require a
temporary relocation of the indoor garden.
To learn more about Hydroponic Gardening come in and talk to our
knowledgeable staff and where you'll find more information
including an extensive range of Hydroponic Pesticides Sprays and
other Hydroponic Gardening Equipment.