Description : . A non-competitive crop requiring weed free period of three or more months a). Maize b). Rice c). Soybean d). Onion
Last Answer : d). Onion
Description : Competitive crops such as corn or soybean require weed-free period of a). 2 months b). 3-4 weeks c). 3 months d). None of the above
Last Answer : b). 3-4 weeks
Description : Noncompetitive crops such as onion or garlic require a weed-free period of a). 3 months or more b). One month c).10 days d). None of the above
Last Answer : a). 3 months or more
Description : Pendimethalin is an effective treat ment for weed control in a). Brinjal, tomato, chillies etc b). Cabbage and cauliflower c). Onion and garlic d). All
Last Answer : d). All
Description : A period in the ontogeny of crop at which maximum crop weed competition occurs is called a). Economic threshold b). Gain threshold c). Competitive threshold d). None
Last Answer : d). None
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
Last Answer : d). Both a and b
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 : Weed responsible for dermal allergies on human is a). Carrot grass b). Common rag weed c). Sneeze weed d). All of these
Last Answer : d). All of these
Description : . A shortest time span in the life cycle of a crop when weeding results in highest eco nomic returns a). Economic threshold b). Critical period c). Competitive threshold d). None of these
Last Answer : b). Critical period
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 : The period at which maximum crop weed competition occurs is a). Critical period b). Dormancy c). Flaming d).Threshold
Last Answer : a). Critical period
Description : Factors affecting weed-crop interference are a). Period of weed growth b). Soil and climate influence c). Plant species effects d). All
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 : Gluphosate + Glufosinate (Double Stack) is resistant trait of which crop a).Canola b). Sugarbeet c). Soybean d).Maize
Last Answer : d).Maize
Description : Glufosinate (Bar) is resistant trait of which crop a).Soybean b).Sugarbeet c).Maize d).Cotton
Last Answer : d).Cotton
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 : Bromoxynil (Bxn) is resistant trait of which crop a).Soybean b).Sugarbeet c).Maize d).Cotton
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 : 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 : The effective solution to manage weed shifts a). Herbicide combinations b). Herbicide rotations c). Crop rotations d). All
Description : November sown berseem crop induces the weed a). Chenopodium sp b). Anagallis sp c). Vicia sp d). All of these
Description : The official peer-reviewed Journal of the EWRS (European Weed Research Society) is a). Journal of Crop and Weed b). Weed Research c). Weed Science
Last Answer : b). Weed Research
Description : Alachlor is an effective pre-emergence her bicide in ______ a). Maize b). Soybean c). Both d). None
Last Answer : c). Both
Description : . Classic example for success of breeding herbicide resistant variety is a). Canola-rape variety resistant to triazine 22 b). Secale cereal resistant to paraquat c). Tracy-M soybean variety resistant to metribuzin d). All of these
Description : The first genetically modified plants, the soybean resistant to glyphosate was developed during a). 1983 b). 2003 c). 1993 d). 1973
Last Answer : a). 1983
Description : The authority associated with the first genetically modified plants the soybean resistant to glyphosate from Monsanto which achieved widespread success was a.) Rachel Carson (May 27, 1907 - April 14, 1964) b). ... Fraley (birthdate: 1953) d). Norman Borlaug (March 25, 1914 - September 12, 2009)
Last Answer : c). Robert Fraley (birthdate: 1953)
Description : Which of the herbicide (ai) requiring higher amount for a unit area to be sprayed a). Bispyribac-sodium b). Butachlor c). Cyhalofop-butyl d). Pyrazosulfuron-ethyl
Last Answer : b). Butachlor
Description : Which of the following crop has high sulphur contents: a. Garlic b. Onion c. Radish d. None
Last Answer : Onion
Description : Which of the following crop is grown sexually a. Potato b. Garlic c. Onion d. Turmeric
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 : 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 : . A preventive method of weed control a). Using weed free seeds b). Using clean machineries c). Following quarantine measures d). All of these
Description : Percent reduction in yield in case of onion due to weeds is a). 20-30 b). 30-35 c). 60-70 d).15-20
Last Answer : c). 60-70
Description : Roots of which plant contains a red pigment which have affinity for oxygen? (a) Carrot (b) Soybean (c) Mustard (d) Radish
Last Answer : (b) Soybean
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 producer usually is most concerned about the a). Competitive threshold b). Economic threshold c). Both a and b d). None of the above
Last Answer : b). Economic threshold
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 : . 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 : A ceremonial weed a). Asparagus racemosus (Shatawari) b). Cynodon dactylon (Dhoob ghaas) c). Both a and b d). Digitaria sanguinalis
Last Answer : c). Both a and b
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 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
Description : A noxious weed of South India a). Cynodon b). Cyperus c). Wild brinjal d). All
Description : Herbicide which increase tuber size be sides weed control in potato a). EPTC b). Fluchloralin c). Pendimethalin d). Atrazine
Last Answer : a). EPTC
Description : Largest pre-emergence herbicide for weed control in citrus and pineapple orchards a). Atrazine b). Metham c). Allyl d). All
Last Answer : b). Metham