A Flat fan nozzle produces a flat sheet of spray with tapered edges operating at lower pressures (15-30 psi) to generate coarse droplets that minimize drift, making it the universally recommended nozzle for herbicide applications.

• Shear nozzle: Used in mistblowers and air-assisted sprayers.
• Solid cone nozzle: Used for spot treatments and soil incorporation.
• Hollow cone nozzle: Operates at high pressure producing fine droplets, recommended for foliar insecticides and fungicides.
• Flat fan nozzle: Standard nozzle recommended for herbicide spraying to ensure uniform ground coverage and minimize spray drift.

Chlorpyriphos (Chlorpyrifos 20% EC) is the premier, officially recommended organophosphate termiticide in India used widely for soil drenching, seed treatment, and building pre/post-construction termite proofing.

• Fonofos: Highly toxic soil insecticide, not widely used in India.
• Fenthion: Organophosphate used against mosquito larvae and fruit flies.
• Diazinon: Broad-spectrum insecticide, not the primary national recommendation for termites.
• Chlorpyriphos: Most widely recommended and applied termiticide in Indian agriculture and construction.

Trichogramma (family Trichogrammatidae, order Hymenoptera) is a minute solitary or gregarious endoparasitic wasp that functions exclusively as an egg parasitoid, laying its eggs inside the eggs of lepidopteran insect pests.

• Adult parasitoid: Attacks adult stage, such as certain tachinid flies.
• Egg parasitoid: Trichogramma exclusively parasitizes and destroys insect eggs before they can hatch into damaging larvae.
• Larval parasitoid: Attacks larvae, such as Bracon and Campoletis.
• All of the above: Incorrect because Trichogramma is strictly an egg parasitoid.