In nature, pests are usually controlled by the presence of insect predators and parasites which keep the populations of the harmful insects in control.
Most of the insects in nature are either beneficial or at least harmless. There are many ways to encourage insect predators in one’s garden.
1. Create a suitable habitat for insect predators. Flowering shrubs and trees throughout the garden will attract many beneficial insects including parasitic wasps which require pollen and nectar for their growth and maturity. Plants belonging to Umbelliferae family are particularly effective in attracting natural enemies of pests.
2. Provide alternate hosts for pests. To ensure availability of food for the beneficial organisms, grow alternate host plants along fence lines and in between cultivated crops. The natural enemy populations on these alternate host plants will control pests attacking the cultivated crop.
3. Create nesting sites for frogs, reptiles and birds. Logs of dead trees, irregularly shaped rocks with crevices and cavities and plenty of mulch can be a good nesting sites for snakes, lizards, frogs, rove beetles and carabid beetles and...