dispersal of seeds and weed. there are several methods of seed and weed dispersal. these methods can be mechanical, physical. animal dispersal, wind dispersal of seed and weed, water dispersal of seed and biological dispersal, in this post we will be learning about the various methods of weed dispersal, so lets begin with seed dispersal.
WHAT IS WEED DISPERSAL?
Weed dispersal is simply the transporting of weeds from one place to another through several means and agents. these methods of transporting seed or weed from place to place is called seed and weed dispersal method
When we say agent of weed dispersal it is generally assumed of anything that takes the seed of plant or crops from one destination to another for the sole purpose of propagation
dispersal agent of weeds is not limited to the ones listed on this blog post so we can assume that there are different types of weed and seed dispersal depending on which angle you as a writer is looking at it from. so many dispersal methods can have different names from different field of endeavour
Dispersal of weed agents
dispersal agents of seed and weed are the various medium through which weed and seed are moved from place to place.
Weeds are mainly dispersed by gutter, animals, explosion and man, there are also times when wind erosion can also be a distinct method of disposing weeds. so on this very blog post I am going to discuss that little methods that are unique and that can be found in every country the process by which seeds are dispersed from one destination to another invariably this weed disperses are not limited to the ones I am going to leave below
so here are a list of the various with these passes as outlined in this very blog post.
the following agents:
Mechanical method of weed and seed dispersal
When speaking of mechanical methods of seed and weed dispersal we are talking about the various links through mechanical means like motor vehicles caterpillars and moving of heavy-duty machinery along Bush paths and the dispersal of weeds and their seed. People also spread many weeds around through their machines
how motor vehicles help in the dispersal of weed and seed
Motor vehicles such as (automobiles and trucks) raise gusts of wind as they travel up and down highways.
As a result, small small seeds or seeds with tufts of hair are easily carried by the wind and blown along the motor paths and highways with each passing motor vehicle.
In this way, many weeds are distributed along roadsides. Similarly, heavy-duty vehicles and their freight cars generate even stronger gusts of winds as they travel up and down railroad tracks
WIND DISPERSAL OF WEEDS AND SEEDS
The structures of some weed seeds enable their distribution by wind. Such features as being winged, having parachute make them easily carried about by wind.
examples of weeds and seed dispersed by wind
Examples of weeds dispersed by wind and Tridax procumbens and Ageratum conyzoides (Goat Weed). Agrostemma
WATER DISPERSAL OF SEEDS
when we talk about water dispersal methods of weed we are invariably talking about running Waters after a heavy downpour or through irrigation method in the farm majorly through surface irrigation water as an important agent to human activity serves as one of the key ways by which seed or weeds on the farm are dispersed from one location to another
Weed seeds can be carried by moving water such as surface run-oft, streams, irrigation and drainage water. They have adaptation lenluus (hat enable movement by water such as membranous sacs containing air of corky protuberances. These make the seeds buoyant on water so that they can float. They can also stay in water for a period without losing viability.
lists of weeds and seed dispersed by water
Example of weed dispersed by water is pig weed.
ANIMAL DISPERSAL OF WEEDS AND SEED
Animals also help in weed dispersal. For instance, weeds that have hooks can be distributed by animals with hairy body because such weeds can attach themselves to the hair of the animals. Example of weeds dispersed by animals is Erogratis tenella. Also seeds of some weeds pass through the digestive tracts of animals, particularly birds without loosing viability.
On defecation, these seeds can germinate into new plants.
MAN AS AN AGENT OF WEED DISPERSAL
Man can transport weed seeds over long distances as a result of movements of agricultural seeds, foodstuff, nursery stock and others. Some weeds or their seeds could cling to the wears of the farmers and these are deposited elsewhere.
Good examples are Boerhevia diffusa (Pig weed) and Acathespermum hispidium.
Man Disperses Numerous Weed Seeds And Fruits With Raw Agricultural Produce. Weeds Mature At The Same Time And Height Along With Crop. Due To Their Similar Size And Shape As That Of Crop Seed, Man Unknowingly Harvest The Weeds Also, And Aids In Dispersal Of Weed Seeds.
Such Weeds Are Called “Satellite Weeds
Self Explosion or Explosive Mechanism of weeds and seed dispersal
This is brought about by the forces set up in dry walls of weeds fruits which cause explosion. This scatters the seeds in the fruits away from the parents plants. Such weeds are said to be self dispersed.
Examples are Sida acuta and Desmodium.
MANY WEEDS HAVE SEEDS OR SEEDPODS THAT CLING TO THE FUR OR BODY OF ANIMALS AND THE CLOTHING OF HUMANS AS A RESULT OF STICKY HAIRS, HOOKED SPINES, OR BARBED AWNS.
EXAMPLES OF WEEDS USING THIS METHOD OF DISPERSION INCLUDE
LAPPA MINOR (LESSER BURDOCK),
TORILIS ARVENSIS (COMMON HEDGE PARSLEY),
AND BIDENS FRONDOSA (COMMON BEGGAR’S TICKS).
weed Dispersal by machinery
Weed seeds often are dispersed by tillage and harvesting equipment.
Seeds move from field to field on the soil that sticks to tractor tires, and vegetative structures often travel on tillage and cultivation equipment and latter dropping them in other fields to start new infestation. Disc-type cultivation equipment is less likely to drag vegetative plant parts than are shovels or sweeps.
Some common garden weeds,Common names and Botanical names
1 Guinea grass Panicumm maximum
2 Elephant grass Pennisetum purpureun
3 Tridax Tridax prociimbem
4 Carpet grass Axonopus compressus
5 Goose grass or Africana Cynodon dactylon
6 Siam weed Eluesine indica
7 African or bush marigold Chromoleana odorata
8 Pig weed Aspilia Africana
9 Goat weed or blue top Boerhavia diffusa
10 Water leaf Ageratum conyzoides
11 Soft weed Talinum triagulare
12 Wild green Erogratis tenella
13 Tropical kudzu Amaranthus spinosus
14 Centro Calapogonium mucunoides
15 Blue flower or water grass Centrosema pubescens
16 Spear grass Commelina spp
17 Striga Imperata cylindrical
18 Wild potato or moring glory Striga senegalensis
19 Broom weed Ipomea spp
20 Emilia Sida acuta
21 Giant star grass Emilia sonchifolia
22 Stubborn grass Cynodon nlemfuensis
23 Sensitive plant Sporobolus pyramidalis
24 Bur weed Mimosa pudica
25 Acanthospermum hisidum
help us share if you find our blog interesting and don’t hesitate to leave your in our comment section.
don’t forget to use the comment box and leave a message or suggestion and we will get back to you within seconds.
You can read some of most interesting topics below
Agricultural biology topics
53. TYPES OF PASTURE
COMMON GRASSES AND LEGUMES
56. ESTABLISHMENT OF PASTURES
57. 201. FORAGE PRESERVATION
58. HAY SILAGE
59. FORESTRY IMPORTANCE OF FORESTRY 206. FOREST MANAGEMENT FOREST REGULATION DEFORESTATION AFFORESTATION