Spiders are harmless to the garden. In fact, they are carnivores that feed on many insects that are harmful to the garden. However, some spiders are poisonous and can harm people and pets in the garden, so steps might be taken to get rid of these spiders. Pesticides are not necessary for harmless spiders.
Black widows are considered the most poisonous spider in America--and are sometimes found in lawns. Brown recluses are not as poisonous as black widows, but are still potentially dangerous. Hobo spider bites create wounds that are necrotic in the same way as those left by the brown recluse.
The black widow spider is black or brown and usually has red markings on their butt. They usually live in very cluttered webs. The brown recluse spider is very difficult to identify, since it looks like a lot of less harmful spiders. They have long legs and are usually brown in color. They also have six eyes, instead of the usual eight eyes. Hobo spiders are brown and small.
Fortunately, this spider also produces a very sharp pain, which lets the sufferer of the bite know to get to the doctor very quickly. Also, there are antivenoms available for the black widow bite. However, their bites can cause nasty reactions that can lead to very necrotic wounds. The necrotic wounds can be very painful and lead to heavy scaring and can even cause the loss of a finger, according to Pest Mall. Even worse, the poison can kill some individuals who are weak, young or old.
Another good thing about black widow spiders is that they usually live in undisturbed areas. Brown recluses normally do not live in the yard (preferring debris, stone piles and wood piles) and mostly come out at night to hunt. Hobo spiders are more commonly found in lawns than the other spiders mentioned above. They live under stones, wood, lawn ornaments and any other hard objects. Hobo spiders are more mobile than many other species. Therefore eradicating them can be difficult, because new hobo spiders will always be coming and going, according to Eagle Rock Research.
Aerosol cans of insecticide such as raid are capable of killing black widows. This should not be done up close because the black widow will likely run towards the sprayer and bite the sprayer, according to Pest Cemetery. So spraying at a distance is recommended. After spraying the black widow, some object should be used to crush the widow to ensure that no one is bit. If a brown recluse infestation is found in the lawn, the area can be sprayed or dusted with insecticides designed to kill spiders. The powders are effective because they do not weaken when they dry up. If hobo spider populations become a serious problem, they can be stopped using glue traps or liquid pesticides that can be sprayed throughout the lawn. Make sure that the pesticides are not harmful to the nearby environment.
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