1. CONTACT VS SYSTEMIC
1.1. CONTACT
1.1.1. Provides an act as barrier to protect against infection so they must be applied before infection.
1.1.2. Kills the host/ spores/ large remains on the outer surface of plant such as leaves or skin of plant.
1.1.3. Acting as a shield for protection.
1.1.4. It is pollute the environment.
1.2. SYSTEMIC
1.2.1. Penetrate into the plant by root system or through leafs.
1.2.2. Harmful to all whom eats the producer and it is also pollute the environment.
2. DEFINITION
2.1. A substance used for destroying insects or other organisms harmful to cultivated plants or to animals.
3. DISCUSSION
3.1. ADVANTAGES
3.1.1. Cheap.
3.1.2. Effective,
3.1.3. Can apply to an individual field (localized).
3.1.4. Application does not require a high level of skill.
3.1.5. Easy to produce.
3.2. DISADVANTAGES
3.2.1. Non- specific chemicals may kill beneficial insects.
3.2.2. Removal of insect predators to the pest may lead to pest resurgence.
3.2.3. Pests may become resistant.
3.2.4. Long term exposure - Harm to humans.