Description : A multi-season annual weed a). Echinochloa colona b). Eclipta alba c). Phyllanthus nirurii d). All of these
Last Answer : d). All of these
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 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 : . Mimicry weed in rice field is a). Wild rice (Oryza sativa var fatua) b). Echinochloa colona c). Echinochloa crusgalli d). All of these
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 : .Which weed is considered as biopesti cide and severely inhibit the growth of water hyacinth? a). Parthenium b). Echinochloa c). Cuscuta d). Lantana
Last Answer : c). Cuscuta
Description : Most dominant factor influencing weed composition in a field is a). Soil moisture b). Soil type c). Soil texture d). Soil temperature
Last Answer : a). Soil moisture
Description : . A ceremonial weed a). Cynodon dactylon b). Datura stramonium c). Tagetus sp d). All of these
Description : Weed eradication is rare but practiced in a). Lantana b). Saccharum sp c). Striga sp d). All of these
Description : The weed having more dormancy a). Dactyloctenium sp b). Lathyrus sp c). Field bind weed d). All of these
Description : . Acidophile weed a). Digitaria sanguinalis b). Borreria sp c). Both a and b d). None of these
Last Answer : c). Both a and b
Description : . A basophile weed a). Alkali grass (Puccinallia sp) b). Quack grass c). Amaranth sp d). Both a and b
Last Answer : d). Both a and b
Description : . Submerged weed a). Hydrilla verticillata b). Nagar sp c). Utricularia stellaris d). All of these
Description : A biennial weed a). Alternanthera sp b). Cichorium intybus c). Circium vulgare d). All of these
Description : November sown berseem crop induces the weed a). Chenopodium sp b). Anagallis sp c). Vicia sp d). All of these
Description : . A weed selective under irrigated conditions a). Commelina benghalensis b). Trianthema sp c). Brachiaria ramosa d). All of these
Description : . A weed acting as a satellite weed a). Avena fatua b). Cuscuta sp c). Cichorium sp d). All of these
Description : The weed producing smallest seed a). Cuscuta sp b). Xanthium sp c). Amaranthus sp d). Commelina sp
Last Answer : a). Cuscuta sp
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 : Weed species which has nematicidal prop erty a). Crotolaria b). Parthenium c). Eichhornia sp d). All 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 : A troublesome weed of water body a). Water lilly b). Lotus (Nelumbo sp) c). Water hyacinth d). All the above
Last Answer : d). All the above
Description : Out of 50 quadrats studied, if Echinochloa is found in 26 quadrats, its frequency of occurrence would be a). 13% b). 26% c). 52% d). 68%
Last Answer : c). 52%
Description : Ammonium nitrate acts as chemical stimu lant to control a). Wild oats b). Eleusine indica c). Echinochloa colona d). All of these
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 : VELGO is a bioherbicide used against a). Echinochloa b). Parthenium c). Cenchrus d). Abutilon
Last Answer : d). Abutilon
Description : An eradication method of weed control a). Killing underground parts of weeds by tillage b). Using soil sterilants c). Repeated foliar application on perennial weeds d). All of these
Description : Factors affecting weed-crop interference are a). Period of weed growth b). Soil and climate influence c). Plant species effects d). All
Last Answer : d). All
Description : The practice that directly hit soil weed seed bank in minimizing future weed infestation a). Microwave irradiation b). Soil solarization c). Stale seed bed d). All e). None
Description : In paddy field which of the following con trols weeds effectively? a). Puddling b). Transplanting c). Manuring d). Both a and b
Description : Trap crop for Cuscuta sp a). Small grains b). Chickpea c). Mustard d). All
Description : Insect to control Lantana a). Ophimoyia sp (seed fly) b). Teleonania sp (Lace bug) c). Theola sp (Butterfly) d). All of these
Description : . Digging reduces population of a). Cynodon sp b). Amaranthus sp c). Convolvulus sp d). None of these
Last Answer : a). Cynodon sp
Description : A parasite in lucerne a). Cuscuta sp b). Orobanche sp c). Striga sp d). All of these
Description : . October sowing of berseem/lucerne pro motes the growth of a). Amaranthus sp b). Trianthema sp c). Both a and b d). None of these
Description : Established at Hisar in 1968, who was the founder President/Secretary of ISWS a). Amaranthus sp b). Chenopodium c). Circium sp d). All of these
Description : Besides isoproturon resistance in P. minor, other cases of herbicide resis tance reported in India are a). Poa annua b). Brachiaria ramosa c). Commelina sp d). None of the above
Last Answer : d). None of the above
Description : Among the herbicide resistant crops, which crop was the most dominant transgenic crops in 2010 a).Soybean b). Cotton c). Maize d).Sugarbeet
Last Answer : a).Soybean
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 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). Asparagus racemosus (Shatawari) b). Cynodon dactylon (Dhoob ghaas) c). Nelumbo nucifera (Lotus flower) d). All of these
Description : A ceremonial weed a). Asparagus racemosus (Shatawari) b). Cynodon dactylon (Dhoob ghaas) c). Both a and b d). Digitaria sanguinalis
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