ICAR AIEEA PG Agronomy 14 July 2023 (Shift 1) Paper

Chemical eradication of Lantana camara:

• Lantana camara is a noxious woody invasive perennial shrub.
• Foliar spray or cut-stump treatment with non-selective systemic herbicides, particularly glyphosate ($1.0-2.0\%\text{ solution}$ or $2.0\text{ kg a.i./ha}$), translocates into the deep root crown, providing effective mortality.

Tembotrione weed control profile:

• Tembotrione (trade name Laudis, Bayer) is a systemic post-emergence herbicide belonging to the triketone family.
• It is specifically registered for weed control in maize (Zea mays), applied along with the safener isoxadifen-ethyl at $120\text{ g a.i./ha}$ at $15-20\text{ days}$ after sowing to control broadleaf and grassy weeds.

Agronomic practices associated with crops:

• Blanket spray: Application of non-selective or residual herbicide across the entire soil surface in sugarcane ratoon crop after stubble shaving -> (III).
• Trash mulch: Spreading sugarcane dried leaves (trash) at $3-5\text{ t/ha}$ in sugarcane inter-row furrows to conserve soil moisture and suppress weeds -> (IV).
• Earthing up: Mounding soil around developing tubers in potato to prevent greening and solanine synthesis -> (II).
• Soybean intercropping: Popular cereal-legume intercropping system with maize ($1:1$ or $2:2$ additive series) -> (I).