By E. VinjeTweet
Integrated Pest Management (IMP)
Long term natural pest control is the most cost effective approach to managing insect pests. This method provides stable, continuous suppression of pests by promoting their natural enemies. The long term approach is also the least toxic method of controlling insects. Chemicals, used only as a last resort, are normally not needed.
Why not just spray?
Most chemical insecticides have very poor aim: they cannot target a particular kind of insect, but blast everything in their path, killing not just the pests but their predators as well. The white flies will go, but so will the ladybugs which feed on them. This means, ironically, that these products are effective for only a limited time. Because they cut such a broad swath through the insect kingdom, they leave a “hole,” an ecological niche, into which the pests can easily return–unless you spray again, and again. Toxic insecticides, therefore, are a tactic of limited use.
There’s another compelling reason to avoid toxic sprays, and this is their tendency to move up the food chain. Remember DDT? This was the insecticide used so widely in the fifties and sixties, until it was found to be weakening the eggshells of birds who fed on the poisoned insects.
Integrated Pest Management
Long term control, by contrast, is achieved through an ecological and economic approach to pest control known as Integrated Pest Management (IPM). As the term “integrated” suggests, IPM does not depend on a single tactic but on combined tactics that are more effective in the long term than any one used by itself.
IPM does require a certain investment in time and energy, but it is less complex than it may appear, and it will eventually make achieving your growing objectives easier. The garden supplies offered on the PLANETNATURAL.com web site will help you manage pests in the most cost-effective way, and they are the safest for you, your pet and the environment.
The IPM Process
1. Do a little background reading on common insect pests of the plants you want to grow. Field scout and monitor with traps to identify pests (not all insects are pests!). Learn the pest’s life cycle so that treatment can be chosen and timed to be most effective.
2. Establish a level of acceptable damage (not all pests are of economic importance).
3. Monitor the pest situation regularly. Only when monitoring has indicated that the pest will cause unacceptable damage should treatment be considered.
4. If the pest population is high enough to cause unacceptable damage, use any and all available means of IPM, but start with those least damaging to pest predators and the environment. For example:
• Cultural Control: Reduce the pest’s food, water, shelter, growing room and other needs. Enhance the environment for the pest’s predators, parasitoids and pathogens (cover crops can be used to attract pest predators). Select plants that are more resistant to pests.
• Mechanical Control: Hand pick or kill pests physically. Use insect traps or barriers to keep pests out. (Sometimes traps alone will give control.) Heat or cold can be used to destroy pests.
• Beneficial Insects: Regular releases of predators and/or parasites (as a prevention and control measure) is part of “conventional” farming IPM.
• Biological Pesticides: These insecticides are living or are toxins produced by living organisms (some of which are microbials such as bacteria and protozoa). They are safe for the environment, have little or no effect on beneficial insects, and are in most cases pest specific.
• Soaps, Oils and Abrasives: These insecticides are generally “natural”, degrade within several days and are not particularly toxic except to insects. They dehydrate or smother pests, but are not selective in that they also can harm beneficial insects.
• Botanical Insecticides: These natural pesticides derived from plants provide a powerful “knock down” to a large number of pests. They leave no residues and breakdown quickly in the environment but can harm beneficial insects as well as pests.
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