Fungicide

Fungicides are chemicals that are used to control fungi. Fungicides are generally divided according to how it works in the body of the target plants are applied, the fungicide nonsistemik, systemic, local and systemic. On fungicides, especially systemic and non systemic fungicides, the division is closely related to the nature and fungicide activity against the target's body.

Nonsistemik fungicide
Nonsistemik Fungicides can not be absorbed and moved within the plant tissue. Fungicides nonsistemik only form a barrier layer on the surface of plants (mostly leaves) where the fungicide was sprayed. Fungicides are only function to prevent infection by inhibiting the germination of fungal spores or mycelial fungi on plant surfaces. Therefore, it serves as a contact fungicide protektan and is only effective when used before the plants are infected by the disease. Consequently, fungicide nonsistemik must often be applied for continuous plants are protected from new infections.

Systemic Fungicide
Systemic fungicide absorbed by the organs of plants and transferred to other plant parts through the transport vessel and through simplas path (through the cell). In general, a systemic fungicide transferred to the top (akropetal), ie from root to leaf organ. Some systemic fungicides can also move downward, ie, from leaf to root (basipetal).

Excess systemic fungicide such as:

The active ingredients go directly to the center of infection in plant tissue, so as to inhibit the fungus infection that has been attacked in the plant tissue. Fungicides are quickly absorbed by plant tissue and then distributed to all parts of the plant so that the active ingredient and the residue is not too dependent on spray coverage, besides the active ingredient is not washed away by rain. Therefore, the application does not need too often.

Local Systemic Fungicide

Local systemic fungicide absorbed by plant tissue, but not transferred to other plant parts. The active ingredient will only be absorbed into the tissue cells that are not too deep and not to go up to haul vessels.

According to its mechanism of action, fungicides were divided into two groups, namely:

Multisite inhibitors
Multisite inhibitors are fungicides that inhibit some metabolic processes of fungi. Multisite nature of this inhibitor is not easy to make fungicide resistance causing fungi. Fungicides that are multisite inhibitors (destructive in many metabolic processes) is generally broad spectrum. Examples of active ingredients is maneb, mankozeb, zineb, probineb, ziram, thiram.

Monosite Inhibitors
Monosite inhibitor also known as site specific, which is a fungicide that works by inhibiting a metabolic process of fungi, such as only inhibit protein synthesis or merely inhibit respiration. Its only work in one of these sites (narrow spectrum) lead to easy emergence of resistance of fungi. Examples of active ingredients is metalaksil, oksadisil, and benalaksil.