English language, Agricultural science,home Economics,foods and nutrition
Stellamarise
Job Price:
₹ 40.00
Location:
other
Duration:
4 hour
Languages Known:
English
About this Talent:
WEEK ONE AND TWO TOPIC: COMMON WEEDS FOUND IN FARMS CONTENT Meaning of Weeds Effects of weeds on crops and the Economy Various types of weeds and their botanical names Methods of weed control MEANING OF WEEDS A weed is any plant that grows in a place where it is not (expected to grow) wanted ECONOMIC IMPORTANCE OF WEEDS They compete with crops for space Weeds compete with crops for sunlight Weeds compete with crop for nutrient Weeds habour crop pests and pathogens Weeds compete with crop for soil moisture It leads to loss in crop yields Weeds compete with crop for soil oxygen They reduce the quality of crops They reduce the income of farmers They cause reduction in the taste of some grasses Some weeds are toxic to farm animals BENEFITS OF WEEDS TO FARMERS Weeds helps in checking soil erosion Some weeds are useful as food for humans Some weeds serve as food for animals Certain weeds have medicinal values They can be used as green manure Some are used for making roots, mats and baskets Weeds are used for mulching Weeds are used for compost making EVALUATION What are weeds? List five beneficial effects of weeds CHARACTERISTICS AND GROWTH HABIT OF WEEDS Production of large quantity of seeds Some weeds reduced by seeds Some weeds reduced by vegetative propagation Growth of large leaves within a short time Weeds growth is favoured during rainy season Most weeds are wind pollinated Production of large quantity of pollen grains DISPERSAL OF WEED SEEDS AND FRUITS Most seeds and fruits of weeds are generally dispersed by wind and animals. The mode of dispersal are; Dispersal of seeds by wind Such weeds have feathery, winged or powdery seeds e.g. Tridax (pwd weed), goats weed, guinea grass, elephant grass and many other species of grasses. Dispersal of seeds by Animal Animal dispersed weeds usually have sticky, hooked, edible or colourful fruits or seeds. The sticky and hooked types of fruits and seeds adhere to the coats of grazing animals and are carried from one place to another. Examples of such animals are; rabbits, rats squirrels, antelope and man. Pig weed and commelina spp are example of such weed. Dispersal of seeds by water Water dispered weeds have water proof cuticles, air spaces within the fruit and a light weight Dispersal of seeds by explosive mechanism Few plants and all leguminouns weeds are dispersed by explosive mechanism eg water leaf, centro, pueraria, calapo and mucuna. COMMON WEEDS FOUND ON FARMS S/N COMMON NAME BOTANICAL NAME 1. Guinea grass Panicum maximum 2. Bahama grass Cynodon dactylon 3. Carpet grass Axonopus compressus 4. Cogon grass Imperata cylindrica 5. Spear grass Heteropogon contortus 6. Wild sun flower Aspilia Africana 7. Centro Centrosema pubescens 8. Water leaf Talinum triangulare 9. Wire/sida weed Sida acuta 10. Goat weed Ageratum conyzoides 11. Elephant grass Pennisetum purpureum 12. Giant star grass Cynodon plectostachyum 13. Pig weed Amaranthus spinosus 14. Tridax Tridax procumbens 15. Calapo Calapogonium mucunoides 16. Sunhemp Crotalaria juncea 17. Mucuna Mucuna utilis 18. Stylo Stylosanthes gracilis 19. Northern gamba Andropogon gayanus 20. Southern gamba Andropogon tectorum 21. Puero Pueraria phaseoloides EVALUATION List and explain different weed dispersal method List five weeds and their botanical names GENERAL CONTROL OF WEEDS Mechanical control: involves the use of machines such as bulldozer, tree puller, plough etc to get rid of unwanted plants. Physical or manual control: This can be done in different ways which includes hand pulling, hoeing, slashing with cutlass etc. Biological Control: This involves the introduction of some insects and herbivorous animals to farmland to eat up the leaves of the weed and even the entire plant in some cases. Cultural control: This involves the use of farming system to get rid of wed. It can be achieved by practice of crop rotation and the growing of cover crops to suppress the growth of the weeds on the farm. Other types of cultural weed control methods are: flooding, bush burning, mulching Chemical Control: This involves the use of chemical solution called herbicides to control weeds. Some herbicides are selective while some are non-selective or contact herbicide REASONS WHY WEEDS ARE DIFFICULT TO CONTROL They have vigorous growth, they are aggressive and persistent Weeds have high reproductive capacity Their seeds have long period of viability Weeds have efficient dispersal method They have efficient means of propagation They have long period of dormancy They produce many seeds They have short life cycle .
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1. I specialize on tutoring younger ones and have I tutored so many students, delivering quality lectures and developed goods lessons notes to my students for several years. I'm also good in communication/customer service and I assure you that if you hire me,you wouldn't regret it because I'm good at what I do and a trial will convince you.
I have good skill in communication, problem solving, secretary job, teaching
