Description : .Phenolic acid as root exudates of which crop has detrimental effects on wild mustard? a). Wheat b). Oats c). Chickpea d). a & b
Last Answer : d). a & b
Description : Allelochemicals liberate through volatiliza tion a). Terpinoid b). Alkaloids c). Tannins d). Lactones
Last Answer : a). Terpinoid
Description : Striga densiflora and Orobanche aegyptica are the weeds of a). Rice and Wheat b). Sugarcane and Mustard c). Wheat and Sugarcane d). Oats and Rice
Last Answer : b). Sugarcane and Mustard
Description : Root exudates of which crop has allelo pathic effect on Chenopodium album? a). Wheat b). Oat c). Pea d). All
Last Answer : d). All
Description : The donor plants release allelochemicals in the immediate environment as a). volatiles b). root exudates c). microbial decomposition products d). All
Description : Growth of the weed is reduced due to root exudates of maize a). Chenopodium album b). Amaranthus retroflexus c). Both a and b d). None of these
Last Answer : c). Both a and b
Description : .Strigol, a witch weed stimulant isolated from the root exudates of a). Cotton b). Sorghum c). Alfaalfa d). Cowpea
Last Answer : a). Cotton
Description : Ammonium nitrate acts as chemical stimu lant to control a). Wild oats b). Eleusine indica c). Echinochloa colona d). All of these
Last Answer : d). All of these
Description : Dormancy mechanism in wild oats a). Innate b). Induced c). Enforced d). All of these
Description : Competitive ability of the crops in decreas ing order a). barley>rye>wheat >oats b). oats>wheat> rye> barley c). rye>barley>oats> wheat d).wheat>oats>barley >rye
Last Answer : a). barley>rye>wheat >oats
Description : The crops known for autotoxicity a). Lucerne and wheat b). Berseem and oats c). Rice and soybeans d). None of these
Last Answer : a). Lucerne and wheat
Description : Which one of the following salts does not con-tain water of crystallisation? a) Blue vitriol b) Baking soda c) Washing soda d) Gypsum
Last Answer : b) Baking soda
Description : . Mimicry weed in wheat field a). Phalaris minor (Canary grass) b). Wild oat c). Both a and b d). None of these
Description : .Which group of allelochemicals con tains Quinones and Coumarines? a). Flavinoids b). Cinnamic acid derivatives c). Tannins d). None
Last Answer : b). Cinnamic acid derivatives
Description : Commonly used chemical fertilizer to con trol submerged weeds and water bloom non -selectively a). Anhydrous ammonia b). Ammonium sulphate c). Ammonium nitrate d). Urea
Last Answer : d). Urea
Description : . Which is the widely used herbicide to con trol broadleaved weeds in winter grains? a). 2,4-D b). MCPA c). Both a and b d). Atrazine
Description : In paddy field which of the following con trols weeds effectively? a). Puddling b). Transplanting c). Manuring d). Both a and b
Last Answer : d). Both a and b
Description : A widely used pre-plant herbicide in con servation agricultural systems a). Pendimethalin b). Trifluralin c). Glyphosate d). Fluchloralin
Last Answer : c). Glyphosate
Description : Herbicidal control of pre-established thatch grass (Imperata cylindrical) con trol in tea orchard a). Glyphosate + 2,4-D b). Oxyflourfen + 2,4-D c). Diuron + 2,4-D d). Paraquat + 2,4-D
Last Answer : a). Glyphosate + 2,4-D
Description : CASST is a bio herbicide used to con trol a). Cenchrus b). Cassia obtusifolia c). Echinochloa d). Eichhornia
Last Answer : b). Cassia obtusifolia
Description : Trap crop for Cuscuta sp a). Small grains b). Chickpea c). Mustard d). All
Description : 2,4-D is injurious to a). Cotton b). Mustard c). Chickpea d). All
Description : .Which crop is an indicator plant for the bio assay of Triazines and Aliphatics? a). Sugarbeet b). Sorghum c). Cotton d). Mustard
Last Answer : a). Sugarbeet
Description : A noxious weed of South India a). Cynodon b). Cyperus c). Wild brinjal d). All
Description : A recent noxious weed of Tamil Nadu a). Wild brinjal b). Striga c). Lantana d). Cuscutta
Last Answer : a). Wild brinjal
Description : . Mimicry weed in rice field is a). Wild rice (Oryza sativa var fatua) b). Echinochloa colona c). Echinochloa crusgalli d). All of these
Description : Which of the weeds make harvesting diffi cult a). Canada thistle b). Cocklebur c). Wild safflower d). All of these
Description : Which is the ‘odd one’ based on mimicry a). Wild rice in rice b). Wild sorghum in sorghum c). Wild sugarcane in sugarcane d). Itch grass in upland rice
Last Answer : d). Itch grass in upland rice
Description : A plant with fibrous root system is – (1) Wheat (2) Pea (3) Mustard (4) Bean
Last Answer : (1) Wheat Explanation: A fibrous root system (sometimes also called adventitious root system) is the opposite of a taproot system. It is usually formed by thin, moderately branching roots growing ... bamboo, banana, rice, wheat, and most of the plants with monocotyledons have fibrous root system.
Description : A plant with fibrous root system is : (1) Wheat (2) Pea (3) Mustard (4) Bean
Last Answer : Wheat
Description : The mode of action of Isoproturon is a). Root inhibitor b). Shoot inhibitor c). Photosynthesis inhibition d). Amino acid inhibition
Last Answer : c). Photosynthesis inhibition
Description : The mode of action of dinitroanilines a). Shoot growth inhibitor b). Lipid inhibitor c). Root growth inhibitor d). Amino acid inhibitor
Last Answer : c). Root growth inhibitor
Description : Auto allelopathy existed in a). Wheat b). alfaalfa c). cowpea d). all
Last Answer : d). all
Description : Isoproturon to wheat is effective at a). 15 DAS b). 25-30 DAS c). 45- DAS d). 5 DAS
Last Answer : b). 25-30 DAS
Description : 2,4-d to wheat is effective when it is ap plied at a). 15 DAS b). 20-25 DAS c). 25-30 DAS d). 45 DAS
Last Answer : c). 25-30 DAS
Description : . Commonly used post-emergence herbicide in wheat a). 2,4-D b). Isoproturon c). Atrazine d). Both a and b
Description : Complete crop failure is caused in which of the following crops a). Vegetables b). Upland rice c). both a and b d). Wheat
Last Answer : c). both a and b
Description : Scheme for testing the field performance of hrbicidies in rice, wheat and sugarcane in different states of India by ICAR was initi ated in a). 1948 b). 1952 c). 1956 d). 1960
Last Answer : b). 1952
Description : A weed not controlled by clodinafop propargyl in wheat a). Poa annua b). Phalaris minor c). Avena ludoviciana d). Lolium temulentum
Last Answer : a). Poa annua
Description : A nitrogen fixing weed species in wheat a). Lathyrus aphaca b). Medicago denticulata c). Vicia sativa d). All
Description : The most common weed in wheat a). Avena ludoviciana b). Echinochloa colona c). Panicum dichotomiflorum d). Eleusine indica
Last Answer : a). Avena ludoviciana
Description : Weed intensity if number of weeds is 110/m2 and wheat plants are 90/m2. a). 55% b). 110% c). 22.5% d). 77.5%
Last Answer : a). 55%
Description : A broad-leaf herbicide in wheat a). Carfentrazone – ethyl 20 g/ha b). Metsulfuron – methyl 4 g/ha c). 2,4-D 500 g/ha d). All
Description : Herbicidal control for isoproturon resis tance Phalaris minor in wheat a). Sulfosulfuron 25 g/ha b). Clodinafop-propargyl 60 g/ha c). Penoxaden 50 g/ha d). All
Description : . A crop has residual allelopathy on wheat a). Rice b). Lentil c). Maize d). Sorghum
Last Answer : b). Lentil
Description : Consumptive use of wheat is a). 800 mm b). 679 mm c). 979 mm d). 479 mm
Last Answer : d). 479 mm
Description : Wheat and bajra have critical period of crop-weed competition a).10-20 days b).15-30 days c). 30-45 days d). 20-40 days
Last Answer : c). 30-45 days
Description : Phalaris minor has developed resistance to isoproturon in Punjab and Haryana in a). Rice b). Wheat c). Sugarcane d). Cotton
Last Answer : b). Wheat
Description : Which of the following gives effective control of Phalaris minor in wheat a). Hand weeding b). Inter-cultivation c). Flaming d). Clodinafop-proparygyl
Last Answer : d). Clodinafop-proparygyl
Description : The effective control of morphological similar Phalaris minor in wheat is achieved with a). 2,4-D b). Glyphosate c). Metsulfuron - methyl d). Isoproturon
Last Answer : d). Isoproturon