Dispose of the dead spider bodies:
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The poison used against insects can make spider plagues even bigger.
Some people believe that using poison for insects on house furniture and stairs will not only kill insects but also the spiders that eat them, assuming that these ones are poisoned for having eaten their preys or just because they ran out of food.
However, a new research carried out by Jamel Sandidge, doctoral student in Kansas University, which was published in November in Nature magazine, shows that the use of insecticide can worsen spider plagues instead of reducing them.
Sandidge explained that according to conventional knowledge, the use of poison kills the insects that spiders usually eat, what in turn reduces their amount of food and leads them to starve to death. But according to Sandidge, someone who is a doctoral student in ecology and evolutionary biology knows this is not the case.
After examining spiders in 71 houses in the city of Kansas and carrying out lab experiments, a conclusion was reached: the spider called Brown Recluse Spider, (Loxosceles reclusa, Araneae: Loxascelidae) of the United Sates, feeds itself on dead insects. In fact- he said-, whenever possible, it prefers to eat dead insects to those who are alive.
“This is really amazing”, added Sandidge. “The brown recluse spider is supposed to be a predator and to feed itself on living insects”. The preference of the brown recluses for dead insects explains why there are so many spiders of this kind in the corners of typical houses, said Sandidge.