Pesticide is chemical which includes all of the following: herbicide, insecticides (which may include insect growth regulators, termiticides, etc.) nematicide, molluscicide, piscicide, avicide, rodenticide, bactericide, insect repellent, animal repellent, antimicrobial, and fungicide. The most common of them are herbicides which account for approximately 80% of all pesticide use. Most pesticides are intended to serve as plant protection products (also known as crop protection products), which in general, protect plants from weeds, fungi, or insects.
However, pesticides are always hazardous to human health. They have residual effect in human health even causing cancer at some circumstances. They are necessary evil for plant crop so as to get rid of insects, fungus, nematodes and diseases.
Waiting period is the duration between the application of any type of pesticide to the harvest of the crop from the same field. It is necessary to wait until the period passes so that no health hazardous will occur in human body due to residual effect of chemical. There are specific waiting period of every pesticide after application to consumption of crops.
Learn the waiting period of most pesticide prevalent in Nepal.
Insecticides are the type of pesticide which are prepared to kill the insect pest attacking the crop plant. They may be of different level of danger viz. red, yellow, blue & green according the hazard effect.
|S.N.||Name of Insecticides||Waiting Period|
|24.||Emamectin benzoate||10 days|
|3.||Hexa- thexazone||20 days|
Fungicides are the pesticides which are prepared to kill fungus pathogen which cause disease in plant crops. They may be both systemic or contact according to the pathogen type.
|S.N.||Name of Pesticide||Waiting period|
|10.||copper hydrochloride||14 days|
|11.||copper hydroxide||14 days|
|12.||copper oxychloride||21 days|
|23.||keroxyme methyl||14 days|
|31.||Thinophate Methyl||14 days|
Biopesticide are pesticide which are prepared from biological organisms to kill the pest or pathogen in order to eradicate the probable disease & pest attack.
|S.N.||Name of Pesticide||Waiting period|
|2)||Beauveria Bassiana||7 days|
|3)||Metarhizium anisophilae||3 days|
|4)||Pseudomonas flurescense||3 days|
|5)||Trichoderma viridis||7 days|
|6)||Verticillium lecani||7 days|
Herbicide are the pesticides which are prepared to kill weeds which may be broad spectrum or systemic in nature.
|S.N.||Name of Pesticide||Waiting Period|
|1.||2,4 D Sodium salt||7 days|
|2.||2,4 D ethyl ester||21 days|
|3.||ammonium salt of glyphosate||56 days|
|10.||Metasulfuron methyl||14 days|
|13.||paraquat dichloride||90 days|
|17.||pairazosulfuron ethyl||7 days|
|18.||sulphosalphuron methyl||60 days|
Note: Pesticide with red color are banned pesticides.
Algicides: Those pesticide which control algae in lakes, canals, ponds water tanks and other sites.
Antifouling: Those pesticide which kill organisms that attach to underwater surfaces.
Antimicrobials: Those pesticide which kill microorganisms such as viruses & bacteria.
Biopesticides: Those pesticide which are derived from natural materials like animals, plants, bacteria and certain minerals.
Biocides: Those pesticide which kill all microorganisms.
Attractants: Those pesticide which attract pests to a trap.
Fungicide: Those pesticide which kill fungi including blights, mildew, rust etc.
Disinfectants: Those pesticide which kill and inactivates disease producing microorganisms or inanimate things.
Fumigants: Those pesticide which produce fumes of smoke or gas intended to destroy pests.
Herbicide: Those pesticide which kill weeds and unwanted plants from main crop field.
Insecticide: Those pesticide which kill insects & arthropods.
Microbial pesticides: Those pesticide which kill or inhibit or out compete pests along with insects & microorganisms.
Miticides: Those pesticide which intend to kill mites which feed on plants and animals.
Nematicides: Those pesticide which kill nematodes i.e. microscopic worm like organisms that feed on plant roots.
Molluscicides: Those pesticide which Kill snails and slugs.
Ovicides: Those pesticide which kill eggs of insects or mites.
Nematicides: Those pesticide which kill nematodes feeding on plant roots.
Repellents: Those pesticide which repel or drive pest, insects birds & mosquito away from source.
Pheromones: Those pesticide which are biochemical and disrupt the mating behavior of insects.
Rodenticides: Those pesticide which kill & control mice & rodents.
Simicides: Those pesticide which kill slime producing organisms like bacteria, algae & so on.