Recent questions tagged weed

Description : The herbicidal activity of 2,4-D at the first time was reported by a). Hammer and Tukey (1944) b). Zimmernam and Hitchcock (1942) c). Nutman and Blackman (1945) d). None

Last Answer : b). Zimmernam and Hitchcock (1942)

Description : The first chemical shown to have herbicidal activity a). 2,4-D b). Bordeux mixture c). Paraquat d). 2,4- DB

Last Answer : b). Bordeux mixture

Description : Inter-culture with bullocks in standing water a). Rice b). Sorghum c). Pearlmillet d). all

Last Answer : a). Rice

Description : Flooding – a worldwide crop husbandry method of controlling weeds in a). Maize b). Sugarcane c). Buckwheat d). Rice e).None

Last Answer : d). Rice

Description : Post-plant tillage helps in a). Mixing of manures b). Control of weeds c). Soil and water conservation d). None e). All

Last Answer : e). All

Description : Practices using direct radiant energy of the sun a). Soil solarization b). Micro-waves c). Flaming d). All

Last Answer : a). Soil solarization

Description : A farming practice influencing weed floristic diversity a). Fertility manipulation b). Crop rotation c). Intercropping d). All e). None

Last Answer : d). All

Description : A companion crop a). Hairy vetch b). Winter rye c). Cowpea d). All

Last Answer : d). All

Description : The first rule of weed prevention a). Regular survey to identify new weeds b). Destruction of weeds before they set seed c). Clean seed d). Clean farm equipments and irrigation water

Last Answer : c). Clean seed

Description : Bioagent for controlling Parthenium hysterophorus a). Bactra verutana b). Zygogramma bicolorata c). Chrysolira d). Flea beetle

Last Answer : b). Zygogramma bicolorata

Description : Flooding is an effective strategy to control a). Avena ludoviciana b). Sorghum halepense c). Cynodon dactylon d). All e). None

Last Answer : a). Avena ludoviciana

Description : Dredging is most effective treatment for controlling a). Parasitic weeds b). Lantana c). Agrestals d). Aquatic weeds

Last Answer : d). Aquatic weeds

Description : Spudding involving hand weeding/ hoeing added by a sharp edged sickle is most common in a). Wheat b). Sugarcane c). Sesame d). Rice

Last Answer : d). Rice

Description : Azolla pinnata is a). a fern b). an algae c). a gymnosperm d). an angiosperm

Last Answer : a). a fern

Description : Besides providing N Azolla is used for weed control in a). Wheat b). Rice c). Castor d). Linseed

Last Answer : b). Rice

Description : Eradication is possible in following weed situations a). Ageratum conyzoides b). Phalaris minor c). Parthenium hysterophorus d). Lantana

Last Answer : d). Lantana

Description : Weed control aims to putting down weed infestation a). Already present b). a + future infestations c). b + introduction from the adjacent fields d). Combining the available techniques in the optimum level

Last Answer : a). Already present

Description : A system approach based on whole land use planning a). Weed eradication b). Weed control c). Weed prevention d). None

Last Answer : d). None

Description : Successful weed management is based on a). Knowledge on weed biology b). Survey on the nature of weed problem c). Whole farm planning d). Removal of weeds before flowering i. a & b ii. b & d iii. c & d iv. All

Last Answer : v. All

Description : A weed poisonous to animals and human beings a). Datura metal b). Ammannia baccifera c). Chenopodium d). Urtica sp

Last Answer : a). Datura metal

Description : Dryland weeds usually have a). deep root b). hairyness c). Mucilaginous stem d). all

Last Answer : d). all

Description : Man associated with ‘Horse Hoeing Husbandry’ a). Zimdahl Robert L. b). Molish c). Jethro Tull d). Aspinall and Milthorpe

Last Answer : c). Jethro Tull

Description : The natural product explored as commercial herbicide a). glufosinate b). dicamba c). cinmethylin d). all

Last Answer : d). all

Description : Hans Molish is associated with a). Competition b). Eutrophication c). Allelomediation d). Allelopathy

Last Answer : d). Allelopathy

Description : The ‘condition influences’ directly plant ability in exploring resources a). Soil density b). Soil CO2 c). Soil N d). Soil water

Last Answer : a). Soil density

Description : A lowland rice sedge a). Cyperus iria b). Cyperus difformis c). Cyperus esculentus d). All

Last Answer : d). All

Description : A sedge with rhizomes a). Commelina obliqua b). Cyperus rotundus c). Scirpus sp d). Eleocharis

Last Answer : b). Cyperus rotundus

Description : A weed with a funnel shaped corolla a). Medicago denticulata b). Vicia sativa c). Convolvulus arvensis d). Scirpus sp

Last Answer : c). Convolvulus arvensis

Description : The partial root parasite a). Cuscuta b). Loranthus c). Striga d). Orobanche

Last Answer : c). Striga

Description : Eichhornia crassips is a representative of a). Free floating b). Rooted floating c). Rooted submerged d). Emergent

Last Answer : a). Free floating

Description : Cultivation of water chestnut (Trapa bispinosa) is abandoned in India due to a). Lantana camara b). Eichhornia c). Mikania micrantha d). Acacia mearnssi

Last Answer : b). Eichhornia

Description : Which of the following causes itching and inflammation a). Ammannia baccifera b). Solanum nigrum c). Urtica sp d). Lantana camara

Last Answer : c). Urtica sp

Description : A weed having spines as adaptations that repel grazing a). Solanum nigrum b). Solanum xanthocarpus c). Parthenium d). Ageratum

Last Answer : b). Solanum xanthocarpus

Description : A weed with a balloon structure for effective dissemination a). Physalis minima b). Avena fatua c). Phalaris minor d). Amaranthus viridis

Last Answer : a). Physalis minima

Description : A weed with a trailing stem a).Convolvulus arvensis b). Digitaria sanguinalis c). Cuscuta sp d). Cynodon sp

Last Answer : a).Convolvulus arvensis

Description : The first prominent instance of biochemical mimicry based crop associated weed under Indian perspective is a). Saccharum spontaneous in sugarcane b). Phalaris minor in wheat c). Wild rice (Oryza longistaninata) in rice d). Itch grass (Rottboellea cochinchinensis) in upland rice

Last Answer : b). Phalaris minor in wheat

Description : Simple perennials are reproduced by a). Rhizomes b). Tubers c). Corms d). Seeds

Last Answer : d). Seeds

Description : The most systematic method for classifying weeds is based on a). Morphology b). Life history c). Habitat d). Phylogenetic

Last Answer : d). Phylogenetic

Description : Commelina benghalensis bearing shortlived blue coloured flowers is a a). Monocot b). Dicot c). Spermatophyte d). Pteridophyta

Last Answer : a). Monocot

Description : Egeria - Anacharis, Water Weed

Last Answer : DESCRIPTION: E. densa, commonly known as Anacharis and Water Weed, is an aquatic perennial native to the warm and temperate regions of South America. It is now naturalized in Central and North America, ... new plants. Cuttings may also be taken and rooted. VARIETIES: E. densa; E. canadensis.

Description : Alternanthera - Alligator Weed, Parrot Leaf (Alternan'thera)

Last Answer : DESCRIPTION: A. ficoidea is a tender, aquatic perennial and is commonly known as Alligator Weed and Parrot Leaf. This dwarf plant only grows 2 inches high. Its narrowly oval, green leaves have wavy ... A. bettzickiana (green foliage); A. sessilis (bronze foliage); A. variegata (variegated foliage).

Description : Weed Sprayers

Last Answer : One of the main problems farmers everyday are weeds. Together with pests, weeds stifle the growth of crops since they compete with the crops for food and sustenance from the ground. For a ... but their functions remain the same: to keep your crops healthy by killing their erstwhile competition.

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