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 : An associated weed in lucerne and potato a). Chicory b). Swine grass (Coronopus didymus) c). Striga d). Both a and b
Last Answer : d). Both a and b
Description : Weed eradication is rare but practiced in a). Lantana b). Saccharum sp c). Striga sp d). All of these
Last Answer : d). All of these
Description : A recent noxious weed of Tamil Nadu a). Wild brinjal b). Striga c). Lantana d). Cuscutta
Last Answer : a). Wild brinjal
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 : In India, Striga is a problem of a). Sorghum b). Pearlmillet c). Both d). None
Last Answer : c). Both
Description : Critical period of crop weed competition in sugarcane is a). 30-40 days b). 30-120 days c). 10-40 days d). 15-30 days
Last Answer : b). 30-120 days
Description : . Trap crop for striga is a). Sunflower b). Cotton c). Cowpea d). All of these
Description : A parasite in lucerne a). Cuscuta sp b). Orobanche sp c). Striga sp d). All of these
Last Answer : a). Cuscuta sp
Description : Ammonium nitrate acts as chemical stimu lant to control a). Wild oats b). Eleusine indica c). Echinochloa colona d). All of these
Description : .Collego was developed to control a). Aeschynomene indica b). Eichhornia c). Cuscuta d). Morrenia odorata
Last Answer : a). Aeschynomene indica
Description : Important quality of bioagents a). Attack only host plant b). Free from predators/parasites and quick adoption to new environment c). Able to kill reproductive parts of weed d). All of these
Description : Early post-emergence treatment is followed in a). Potato b). Sugarcane c). Both a and b d). Rice
Last Answer : c). Both a and b
Description : Blind hoeing with bullock/tractor drawn spike-tooth harrow successfully controls weeds in a). Potato b). Sugarcane c). Maize d). Both a and b
Description : Total Stem Parasite Weed of onion is? A. Orabanche cernua B. Striga lutea C. Cuscuta chinensis D. None
Last Answer : C. Cuscuta chinensis
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 : Sugarcane takes about how much time to complete its germination phase a).10 days b).15 days c). One month d). 60 days
Last Answer : c). One month
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 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 ceremonial weed a). Asparagus racemosus (Shatawari) b). Cynodon dactylon (Dhoob ghaas) c). Both a and b d). Digitaria sanguinalis
Description : The weed less responsive to nitrogen a). Cyperus b). Cynodon c). Both a and b d). None of these
Description : A simple perennial weed a). Ipomoea carnea b). Lantana camara c). Both a and b d). None of these
Description : . Acidophile weed a). Digitaria sanguinalis b). Borreria sp c). Both a and b d). None of these
Description : . A basophile weed a). Alkali grass (Puccinallia sp) b). Quack grass c). Amaranth sp d). Both a and b
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
Description : . Common weed in pasture land a). Tephrosia procumbens b). Boerhaavia diffusa c). Both a and b d). None of these
Description : . Mimicry weed in wheat field a). Phalaris minor (Canary grass) b). Wild oat c). Both a and b d). None of these
Description : In which weed seeds mature after uproot ing the plant? a). Stellaria media (Chick weed) b). Portulaca oleracea c). Both a and b d). None of these
Description : A weed brought as ornamental a). Water hyacinth b). Lantana c). Both a and b d). None of these
Description : A weed producing > 1 lakh seeds/plant a). Amaranthus sp b). Portulaca sp c). Both a and b d). Cascutta sp
Description : A diocious weed a). Canada thistle b). Eel grass c). Amaranthus sp d). Both a and b
Description : Which of the weed act as alternate host on gram caterpillar of redgram? a). Amaranthus b). Datura c). Both a and b d). None of these
Description : Which of the following weed is used in cot tage industry for making rope and thatch material? a). Typha b). Saccharum sp c). Both a and b d). Lantana
Description : Which weed induces asthama in humans due to pollen spread? a). Ambrosia artemissifolia b). Franseria sp c). Both a and b d). None of these
Description : Integrated weed management practices that a). Enhance crop competitive ability b). Decrease weeds ability to reduce yield c). Practices that eliminate weeds from an area d). Both a and b e). Both a and c
Description : . Digging reduces population of a). Cynodon sp b). Amaranthus sp c). Convolvulus sp d). None of these
Last Answer : a). Cynodon sp
Description : If Echinochloa falls in frequency class ‘E’, the weed community is said to be a). Contiguous b). Heterogenous c). Homogenous d). Random
Last Answer : c). Homogenous
Description : If weed population is 70/m2 and the crop 140/ m2, weed intensity would be a). 33.3% b). 66.6% c). 50% d). 73.4%
Last Answer : a). 33.3%
Description : If the count of Echinochloa in weedy check is 70 and that in a treatment 25/m2, weed control efficiency will be a). 54.3% b). 64.3% c). 73.4% d). 79.6%
Last Answer : b). 64.3%
Description : If the yield from weed free is 3500 kg and that from weedy 1500 kg/ha, weed index would be a). 57.1% b). 133.3% c). 45.0% d). 25.6%
Last Answer : a). 57.1%
Description : . A ceremonial weed a). Cynodon dactylon b). Datura stramonium c). Tagetus sp d). All of these
Description : A ceremonial weed a). Asparagus racemosus (Shatawari) b). Cynodon dactylon (Dhoob ghaas) c). Nelumbo nucifera (Lotus flower) d). All of these
Description : To manage grassy weed flora in barley which of the herbicides is to be applied a). Pendimethalin b). Isoproturon c). a and b d). Metsulfuron
Last Answer : c). a and b
Description : To manage mixed weed flora in barley which of the herbicides is to be applied a).2,4-D b). Isoproturon c). a and b as tank mix d). None of these
Last Answer : c). a and b as tank mix
Description : A herbicide requiring good spray coverage of all foliage for effective control of a weed population a).Paraquat b). Glyphosate c). Atrazine d). Isoproturon
Last Answer : a).Paraquat
Description : A curvilinear relationship between weed density and crop yield was reported by a). Zimdahl 1980 b). Roberts and Bonds (1975) c). Cousens et al (1985) d). None of these
Last Answer : b). Roberts and Bonds (1975)
Description : The sigmoidal relationship between weed density and crop yield was proposed by a).Zimdahl 1980 b). Roberts and Bonds (1975) c). Cousens et al (1985) d). None of these
Last Answer : a).Zimdahl 1980
Description : A weed accumulate over 550 ppm of Zn in its dry matter a). Digitaria b). Setaria lutescens c). Portulaca d). Chenopodium
Last Answer : b). Setaria lutescens
Description : A natural pre-emergence weed control in turf grass a). Corn gluten meal b). Bialaphos c). Sulcotrione d). Cinmethylin
Last Answer : a). Corn gluten meal
Description : With poor weed management, a field could shift to a). Predominant weed species b). Species not effectively controlled c). Species not responded to control meas ures d). All the above
Last Answer : d). All the above