Landscaping - Managing Insects
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Landscaping - Managing Insects Keeping destructive insects to a minimum is now easier than ever. Thanks to innovative biologists and chemists, there are a dozen safe ways to control damaging insects. The first step is to correctly identify what kind of insects you have or are likely to get. There are thousands of common species, but typically only a handful do most of the harm in any given area. These can often be identified in one or more of three ways. You can check the leaves of your plants, flowers and shrubs and match them against photos you can find online. If you search for information about the specific plants you're worried about you'll quickly find the most common pests. Accompanying that information is frequently a photo you can use for comparison. Many times, though, insects on flowers, trees, grass and other plants are hidden. In that case you can rely on a guess and apply control methods based on the common invasive species. Aphids frequently infest rose bushes, for example, and can be difficult to spot. Grass often has grub infestations that could only be visually detected by careful inspection underneath the soil. Another method is to examine the effects. If you find large, roughly round, brown spots on grass - especially in late Spring through Summer - you probably have a Japanese Beetle grub problem. There can be other causes, double check your guess by the previously listed methods. If you find that patches of grass pull away easily from the soil like carpet that has come loose from its tacks, you probably have a grub problem. Once you identify the species that is causing the problem, eliminating it is usually safe, inexpensive and easy using modern control methods. That doesn't necessarily mean purchasing and spraying large areas with chemicals, though many today are designed to be perfectly safe for humans and the environment. Instead of using grub killing fertilizer or insecticide, for example, you can use biological control methods. These are becoming more popular and more effective all the time. A substance called 'milky spores' can be a very cost effective way to control grubs in lawns. Initially biological control may be more costly than a bag of grub insecticide. A 30lb bag of grub killer may cost $10 and last two years where a 1-liter bottle of milky spores may be $30 or more, but it lasts for 10 years. The substance works well because it actually contains living organisms that invade the grub larvae and interrupts their growth cycle. In effect, you have one organism killing another. But the spores do no harm to your lawn, only to the grub. There are many other biological control methods, each tailored to attack a specific problem. They have to be, since organisms are fairly particular about what insects they will invade and when. But you'll find them safe, cost effective and frequently longer lasting than chemical methods. You can always fall back onto chemical insecticides when needed, too. Modern insecticides have become very sophisticated, frequently decaying from the environment safely and quickly into harmless byproducts. At the same time, they do the job before fading away. |