insect management Flashcards
how can insects be managed
- resistance in plants
- pesticides
- cultural practices
- biological control
what are two examples of how plant varieties have become resistant to insects
the plant variety produces substances that have an adverse effect on the insect
the plant variety has a trait that makes the plant undesirable for food, shelter or egg laying
what are insecticides
a type of pesticide that kills insects
how do insecticides kill insects
some disrupt the nervous system, others may damage insect exoskeletons, others repel them or control them by some other means
what forms can insecticides come in
they can be sprays, dust, seed treatments, or baits
what else can insecticides cause risk to
each insecticide can pose a different risk level to non-target insects, people, birds, animals, and the environment
what happens if you constantly use the same insecticide
it encourages the insect to become resistant
what are some cultural practices that can be used to reduce insects
- early or late seeding of plants to avoid damage
- change in tillage operations. (some prefer no-till systems and others prefer conventionally tilled systems)
- ensure plants are healthy as possible to recover from insect injury
- crop-rotation for insects with low mobility
what are two examples of biological control agents for insects
beauveria brassiana
bacillus thuringensis called Bt
