Category: Weed Science Tables
Weeds & Medicinal Values of Weeds
By Agritests |
21 Jun, 2026
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Weed Medicinal Value Phyllanthus niruri Jaundice Eclipta alba Scorpion sting Centella asiatica Improves memory Cynodon dactylon Asthma, piles Cyperus rotundus Stimulates milk secretion Leucas aspera Snake bite Calotropis procera Gastric trouble Abutilon indicum Piles
Seed Production Capacity of Weeds
By Agritests |
21 Jun, 2026
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Name of Weed Seeds / Plant Amaranthus retroflexus 1,96,405 Solanum nigrum 1,78,000 Chenopodium album 72,000 Trianthema portulacastrum 52,000
Critical Period of Weed Competition for Important Crops
By Agritests |
21 Jun, 2026
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Crop Critical Period (DAS) Rice (lowland) 35 Rice (upland) 60 Sorghum 30 Finger millet 15 Pearl millet 35 Maize 30 Cotton 35 Sugarcane 90 Groundnut 45 Soybean 45 Onion 60 Tomato 30
Critical Period of Crop–Weed Competition
By Agritests |
21 Jun, 2026
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Crop Critical Period (Days) Reduction in Grain Yield (%) Cereals Paddy – Direct sown 20 – 45 15 – 90 Paddy – Transplanted 30 – 45 15 – 40 Paddy – Upland condition Entire period 40 – 90 Wheat 30 – 45 20 – 40 Maize 15 – 45 40 – 60 Sorghum 15 – […]
Importance of Weeds with Examples
By Agritests |
21 Jun, 2026
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Importance Examples Maintain soil fertility Typha spp. (adds 1–35% nitrogen) Control soil erosion Cynodon dactylon, Convolvulus arvensis Used as fodder Cichorium intybus, Cynodon spp. Have medicinal value Leucas aspera – used in snake bite Striga spp. – used in diabetes Phyllanthus niruri – used in jaundice Argemone mexicana – used in skin disease Have economical […]
Biological control of Weeds
By Agritests |
21 Jun, 2026
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🌱 Weed 🦠 Bio-agent 📝 Remark Lantana camara Crosidosema lantani Moth Opuntia spp. (Cactus) Cactoblastis cactorum Insect Cyperus rotundus Bactra varutana Shoot boring moth Eichhornia crassipes Rhizoctonia solani Fungus Orobanche spp. Sclerotinia spp. Fungus Xanthium strumarium Chinese grass carp (T. idella) Biological feeder Aquatic weeds Cassia sericea / C. tora Competitive plant Parthenium hysterophorus Zygrogramma […]
Some Harmful Weeds of Field Crops
By Agritests |
21 Jun, 2026
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Name of Crop Harmful Weeds Paddy Sanva, Wild rice Wheat and Barley Phalaris (Gulli-danda, Gehu ka mama), Goosefoot, Red chickweed, Wild oat Pea, Lentil, Mustard, Linseed, Gram Goosefoot, Red chickweed, Lathyrus Clover Common chicory Mustard, Tobacco Orobanche (Parasitic weed) Green gram, Black gram, Pigeonpea, Cotton, Groundnut, Soybean Stone breaker, Spider weed, Safed murg Maize, Sorghum, […]
Weed and Suitable Herbicide
By Agritests |
21 Jun, 2026
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Name of Weed Suitable Herbicide Wild carrot Simazine, Atrazine, Alachlor Wild oat Triallate, Trifluralin, Barban Java grass (Motha) Atrazine Wild rice Alachlor, EPTC, Trifluralin Goosefoot Metolachlor, Alachlor Field bindweed MCPA, 2,4-D Blade grass (Thatch grass) MSMA, Dalapon False cane Paraquat, Diquat Hyacinth Paraquat Canary grass Isoproturon Hypomia 2,4-D Striga (Witch weed) Finake, Simazine, Atrazine
Weed Name & Their Family
By Agritests |
21 Jun, 2026
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Weed Name Family Prickly chaffflower Amaranthaceae Bilgoat weed Compositae Wild safflower Compositae Chicory / Blue daisy Compositae False daisy Compositae Garden spurge Compositae Pill-pod spurge Compositae Congress grass / Wild carrot grass Compositae Wild mint Compositae Mexican daisy Compositae Cocklebur / Bur-weed Compositae Spiny amaranths Amaranthaceae Slender amaranthus Amaranthaceae White cock’s comb Amaranthaceae Mexican prickly […]
Botanical Name of Different Weeds
By Agritests |
21 Jun, 2026
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English Name Botanical Name Prickly chaff flower Achyranthes aspera Thorny amaranth Amaranthus spinosus Wild amaranth Amaranthus viridis Red chickweed Anagallis arvensis Mexican poppy Argemone mexicana Wild onion Asphodelus tenuifolius Wild oat Avena fatua Goosefoot (Bathua) Chenopodium album Nettle-leaved goosefoot Chenopodium murale Common chicory Cichorium intybus Spider weed Cleome gynandra Field bindweed Convolvulus arvensis Wild jute […]