Once
the critter is ID’d and you know its life history you will find out how quickly
it can reproduce. This can give you a clue as to how quickly you need to
respond. Spider mites are tiny little guys that like to suck the fluids out of
plants. An ID book shows a picture (of a spider mite) that is roughly 3/16 of
an inch in size ( 1 /16 of an inch is one inch broken into 16 equal parts) and
by the picture it states that the 3/16 inch picture is 10 times the actual
size. These guys are miniscule. Spider mites do not like water and spraying the
foliage with water can help control them, careful you can drown your
plants. Spider mites are a very
formative predator. Their reproduction capabilities: 60 degrees, egg to adult
is 30 days. This would provide a bit of a buffer to get them under control. At
90 degrees the egg to adult period is a mere 3.5 days. If you know that you
have a spider mite problem at this time, most likely there is nothing you can
do. Signs of spider mites are leaves that are dull in color with lighter spots
on the leaves, a general dull desiccated look. As the population increases
webbing shows on the leaves, hence their name sake. Spider mites colonize the
tops of plants. The driest location of the plant.
Plant
predation can happen quickly.
Your
bug is ID’d and you have learned all you can about it, you are ready to control
them. I must emphasize Control. Control is what it imply s, one does not want
to eradicate ALL of your would be diners. If you did then there would be
nothing for the beneficial insects to be attracted to your garden.
Most
of the following defenses should be in affect before the diner guests arrive.
These have the potential of alleviating or even preventing an outbreak.
First
line of defense: create a very diverse environment in your garden. This could
be just a wide variety of veggies, collection of flowering herbs or even a wild
flower garden to draw in predator Predators. Has a nice ring to it.
Secondly:
exclusion is the least lethal but also one of the most affective controls. If a
critter can't get to it, it won't be eaten. I must relate a grasshopper story.
The outbreak of 2004 there were so many that they were literally eating through
the fabric. This was a very hopeless situation. This is why you need many
different approaches to your control practices! Control solution later.
Thirdly:
hand control, not for the squeamish but very affective. At least you have 100
percent certainty that that bug will not see your garden ever again. For small
gardens this may be the only control that is needed. It becomes more difficult
when a garden has several hundred plants.
Fourthly: repellents, can move would be diners out of the
garden. This could be a garlic spray for flea beetles.
Fifth: Traps can be effective but they must be
monitored daily. A trap can be as simple as a board in the garden to lure
pill bugs, squash bugs or any pest that likes to hide in the day. Lift the
board in the morning and pour boiling water on these guys. Organic control can
be ruthless.
Sixth: fowl, will clean a buffer around your garden, but be very
very very careful if they enter the garden proper!!! They will
thrash anything green!!!.It was my guinea fowl that finally brought the
grasshoppers that ate their way through my fabric under control. They are awesome!!
Lastly one would move onto sprays. One has to be very careful
because YOU can very easily destroy all of your patiently created biodiversity
in one swoop.
There are a number of Organic pesticides on the market. Not
screaming but being very adamant!. JUST BECAUSE THE SPRAY IS ORGANIC APPROVED
DOES NOT MEAN IT CAN NOT BE DETRIMENTAL TO HUMANS TOO!
That said one must research their pesticide use. READ THE LABEL!
Be careful of over spray onto non target areas, wear appropriate attire, use
proper timing and follow up spraying.
I have said on many occasions that I am a reluctant sprayer. But
sometimes push comes to shove. I will list some of the sprays I have used and
the results I have achieved with them. Johnny's Selected Seeds, Peaceful Valley
Farm Supply and most other seed houses sell organic pesticides.
I have used soap spray. A very effective spray on
aphids and spider mites along with most other soft bodied pest, but a huge
drawback of soap spray is that not only is it a broad spectrum pesticide but also
it causes a photo and phyto toxicity to your pants. Simply it burns the foliage
even if it is washed off after a few minutes. It must be noted the only killing
power is right at the time of spraying, no residual affect.
Bt, Bacillus thuringiensis is very effective on
caterpillars. It can kill any of the Lepidoptera family (moths and
butterflies). This is where it is EXTREMELY important to know your target and
be very careful with over spray. This will kill non targets just as easy. One
must be very careful of over using Bt because it can cause insects to build up
an immunity to it. Bt works on contact but also can be ingested.
Clarified hydrophobic neem oil is very good for aphids and
spider mites. This is a neem oil that has had most of the growth hormones
removed and is just a contact pesticide like soap sprays. It does have a smell
to it that works as a repellent too. There is no residual affect from clarified
neem oil.
Probably my biggest cannon in my
arsenal is Cold Pressed Neem oil. A very impressive pesticide! I have not found
any scientific data showing any contradictory info on cold pressed neem. Neem
has been used in India for a very long time and India seems to be thriving. It
is used for hair wash, gingivitis, along with other hygiene uses. Dosages would
be small but none the less, it is not the same as spraying yourself with DDT to
remove body lice.
Cold pressed neem, other than its
oil properties, does not kill on contact. The oil suffocates the pest. Care
must be taken that there are no beneficial insects around when it is sprayed.
This contact property of the oil WILL kill lady bugs and honey bees as well.
The best time to spray is in the evening.
Growth hormones within the neem once
eaten, cause the pest to either stop feeding and / or stop molting. Death is
certain but not directly from the neem. It is for this reason that insects have
not been able to build up a resistance to neem oil. It is affective on over 100
garden pests. The oil does exhibit systemic properties and is taken up by the
plant roots. There is a neem oil smell that has repelling properties too. Used
as a foliar spray, it breaks down in 8 hours of sunlight. As a systemic there
is a 14 day period that it remains active within the plant. Do not expose
freshly sprayed foliage to sunlight it WILL burn the plants.
For me this is a last resort remedy.
Whenever a pesticide is used there usually are secondary casualties that may
not be evident right away.
Those hormones removed from Clarified
hydrophobic neem, are sold on the market in concentrated forms. Like so many
things I feel that the whole of something is much more than the parts. Take the
simple tomato, grown in the ground taking up all those soil goodies coupled
with warmth and sunshine and then bite into a vine ripe tomato it is a bit of
ecstasy. On the other hand take a hydroponic grown tomato that is “getting all
it needs” with a chemical solution of NPK. Granted there is warmth and sunshine
too but there just is not that same moment of bliss when you bite into a
hothouse tomato. The whole is greater than the parts!!
I still search for scientific data
against Cold Pressed Neem Oil. I may not be asking the right questions!
If the neem oil container Does Not
specifically say “Cold Pressed Neem Oil”, it is Clarified Hydrophobic Neem Oil,
the refined one without the hormones.
One last important note: if the
veggies need to have insects washed off at preparation time, this is not a bad
thing. This could be considered as a proof of purchase sticker. If insects can
eat the veggie and not die, it can be consumed by humans!!