How did humans get rid of hornets and other pests before insecticides were invented?

Before insect ic ides were invent ed , humans re lied on a variety of methods to control p ests like hor net s . Some of these methods included : \n \n 1 . C rop rotation : Farm ers would rotate their cro ps from year to year , plant ing different types of plants in different areas . This would help to reduce the population of p ests that were attract ed to certain cro ps . \n 2 . Bi ological control : This involves using natural pred ators or par as ites to control p est populations . For example , lady bug s are natural pred ators of a ph ids , and can be introduced to a garden to help control their population . \n 3 . Cultural practices : This involves making changes to the way cro ps are grown or managed to reduce the risk of p est damage . For example , far mers might plant cro ps in rows with spaces between them to allow for better air circul ation and reduce the risk of disease . \n 4 . Mechan ical control : This involves using physical means to control p ests . For example , far mers might use tra ps or bar riers to prevent p ests from entering their fields . \n 5 . Chem ical control : Before insect ic ides were invent ed , people used a variety of chemical s to control p ests . For example , they might use sul fur or lead ar sen ate to control insect s . \n \n Over all , cont rolling p ests before insect ic ides were invent ed was a complex and mult if ac et ed process that involved a combination of these methods . </s>