What are the classification of weeds?



When classified by their gross morphological features, weeds are broken into three major categories: grasses, sedges, and broadleaf weeds. When classified by their life cycle, they are broken into annual, biennial, and perennial.

What are the five 5 characteristics of weeds?

CHARACTERISTICS OF WEEDS

  • Weeds can spread by sexual and vegetative methods.
  • Weeds can survive adverse weather condition.
  • Weeds produce large number of seeds.
  • Weeds are aggressive and persistent in trampling.
  • Some weeds mature at the same time with crops & being harvested with crop.

What are the five common weeds?

13 Common Lawn and Garden Weeds

  • Crabgrass (Digitaria spp.) Crabgrass. …
  • Purslane (Portulaca oleracea) …
  • Lambsquarters (Chenopodium album) …
  • Pigweed (Amaranthus spp.) …
  • Chickweed (Stellaria sp. …
  • Dandelion (Taraxacum officinale) …
  • Shepherd’s Purse (Capsella bursa-pastoris) …
  • Creeping Charlie (Glechoma hederacea)

What are obligate weeds?





(1) Obligate weeds: Such weeds are grown only in association with man and his agriculture. It is never found in wild form ex, Amagallis, Chienopodium spp etc. (2) Facultative weeds: Such type of weeds are grown both as wild and in cultivated habit Argenione mexicana, Euphorbia hirta etc.

What are two characteristics of weeds?

Common characteristics of weedy species include aggressive growth, competition with other plants for light, water, nutrients, and space, an ability to grow in a wide range of soils and adverse conditions, and resistance to control measures.

What are the three types of weeds?

Most common field weeds are annuals. Biennials – Weeds that live more than one year but not more than two years. Perennials – Perennial weeds are weeds that live more than two years.

How many types of weeds are there?

There are three different types: grassy-type, grass-like, and broadleaf. Grassy-type weeds are actual grasses that germinate and grow just like the grasses that we want in our lawns. Examples of this type are foxtails, goosegrass, crabgrass and quackgrass, to name just a few.

What are the name of weeds?





20 common weeds in local areas

  • Speargrass (Imperata cylindrica) Photo: wiktionary.org. …
  • Siam weed (Chromolaena odorata) Photo: youtube.com. …
  • Nutgrass (Cyperus rotundus) …
  • Milkweed (Euphorbia heterophylla) …
  • Nuke-Noh (Tridax procumbens) …
  • Witchweed (Striga genus) …
  • Couchgrass (Digitaria abyssinica) …
  • Dayflower (Commelina benghalensis)

What are the scientific name of weeds?

Common and Scientific Names of Weeds

Common Name Scientific Name
Barnyardgrass Echinochloa crus-galli
Bermudagrass Cynodon dactylon
Bindweed, field Convolvulus arvensis
Blackberries Rubus spp.

Which plants are called weeds?

The unwanted plants which grow in field along with the crop plants are termed as weed. They are harmful for the crops as they compete for nutrients with them.

Why weeds are classified?

The weeds are classified according to their life cycle and how long they persist. This classification uses three main categories: annual, biennial, and perennial.

Why do we classify weeds?

Most farmers use a different method of classifying weeds since it is easier to understand and separate each weed from another in order to control them.



What are parasitic weeds?

Parasitic weeds belong to a group of plants which have lost their autotrophic way of life during their developmental process (evolution). They are nutrition specialists to the disadvantage of their host plants.

What are the 2 type of weeds?

Classification of Weeds – 1 Based on life span

What are weeds and its characteristics?

Definition of Weed: A plant which is prolific of persistence in nature and whose potentialities for harm are greater than their potentialities for good. A plant growing where it is not desired/unwanted particularly where man is attempting to grow a crop.

How do you identify weeds?

Identifying Characteristics of Weeds

  1. Leaf shape, leaf margins, and venation (branching pattern of leaf veins)
  2. Leaf structure (simple or compound)
  3. Arrangement of leaves on the stem.
  4. Presence or absence of hairs on leaves or other parts of the plant.
  5. Flower structure, color, size.

What are the characteristics of a good quality seed?

Characteristics of good quality seed



  • Higher genetically purity:
  • Higher physical purity for certification.
  • Possession of good shape, size, colour, etc., according to specifications of variety.
  • Higher physical soundness and weight.
  • Higher germination ( 90 to 95 % depending on the crop)
  • Higher physiological vigour and stamina.

What are advantages of weeds?

They can help fertilize the soil, increase moisture, serve as a living mulch, repel pests, and even attract insects and bugs that your main crops can take advantage of. What’s more, some of these weeds can also be used as tasty ingredients in your kitchen and even medicinally.

What are 5 disadvantages of weeds?

Comparison Table of Advantages and Disadvantages of Weeds

Advantages of Weeds Disadvantages of Weeds
Check soil, wind, and water erosion The efficiency of irrigation is reduced
Fodder for animals Land value gets reduced
Used for decoration at homes Production of the main crop reduces.

What are the problems of weeds?

In addition to direct competition with crops (or parasitism), weeds cause indi- rect damage by harbouring insect pests and crop pathogens. Direct losses caused by weeds vary from crop to crop and from one agro-ecological zone to the other for the same crop.