Weeds & Their Control- Classification of Weeds
Weeds can be classified in many ways as:
A) Classification based on life cycle:
a) Annuals: Weeds complete their life cycle within a year.
i) Seasonal weeds:
1. Monsoon annuals or Kharif season weeds: Weeds complete their life cycle during Kharif or rainy season. E.g.: Hazardana, kurdu, Aghada.
2. Winter annuals or Rabi season weeds: Weeds complete their life cycle during rabi or during winter season. E.g.: Pisola
ii. Two seasonal weeds: Weeds complete their life cycle within two seasons. E.g.: Jungli gobhi Lunea sp.
b) Biennials: Weeds require two years for completion of their life cycle. E.g.: Wild carrot (Daucus carota)
c. Perennials: Weeds continue their life cycle for years together. E.g.: lavala, hariyali, Kans, lajalu.
B) Classification based on habitat or place of occurrence:
a. Weeds of cropped land: Bathua, Kurdu.
b. Weeds of pastures & grazing lands: Hariyali, Unhali, Kans.
c. Weeds along water channels: Jalkumbhi (Eichhornia crassipes).
d. Weeds along roadside: Tarota, Unhali.
e. Weeds of waste lands: Ber, Sarata, Reshimkata.
f. Weeds of lawn & orchards: Ganja, Ghaneri.g.
g. Weeds of forest lands: Ghaneri, Nagphana.
C) Classification based on dependence on other hosts:
a. Stem parasite: Amerbel
b. Root parasite: Striga on Jowar, Sugarcane, and Bambakhu on Tobacco, Brinjal or Chilli.
c. Independent: Chandvel.
D) Classification based on soil type:
a. Weeds of black soils: Hariyali, Kans, Kunda.
b. Weeds on sandy loam soil: Aghada, Kurdu.
c. Weeds of ill drained soil: Lavala, Panbibi.
d. Weeds in tank: It may be submerged, immersed or floating. E.g.: Aquatic weeds like water hyacinth, cattails.
E) Classification based on plant family:
a. Graminae: Hariyali, Kunda, Kans.
b. Commelinaceae: Kena, vinchu, Panbibi.
c. Cyperaceace: Nagarmotha.
d. Amaranthaceac: Aghada, math, Kurdu.
e. Euphorbiaceae: Dudhi, Pisola, Wild castor.
f. Composite: Gokhuru, Jakham Judi, Gajar Gawat.
g. Leguminous: Lajalu, wild Mung, Unhali.
h. Malvaceae: Petari, wild bhendi.
i. Tiliaceae: Wild jute.
j. Cruciferae: Wild mustard.
k. Chenopodiaceae: Chandan Bathua.
l. Solanaceae: Kamuni, Wild Brinjal.
m. Papaveraceae: Satyanashi, Dhatura.
n. Portulacaceae: Ghol
o. Orobanchaeceae: Bambakhu
p. Cactaceae: Nagphana