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
Last Answer : c). Both a and b
Description : Which herbicide mode of action is pigment inhibitor? a). MCPA b). Fluchloralin c). Chlomazone d). 2,4-D
Last Answer : c). Chlomazone
Description : Which herbicide is amino acid synthesis inhibitor a). Glyphosate b). 2,4-D c). MCPA d).Atrazine
Last Answer : a). Glyphosate
Description : Which of the weeds are rapidly controlled by MCPA than 2,4-D a). Nutsedge b). Canada thistle c). Both d). None
Last Answer : c). Both
Description : At sub lethal dose which of the herbicides improves colour of the apple a). 2,4-D b). 2,4,5-T c). MCPA d). All of these
Last Answer : b). 2,4,5-T
Description : MCPA was developed during 1945 in Eng land by a). W.G. Templeman b). W.A. Sexton c). Both of them d). None of these
Last Answer : c). Both of them
Description : 4. Reverse metabolism induce the suscepti bility to weeds by a). 2,4-D b). MCPA c). Both a and b d). None of these
Description : Microbial breakdown of phenoxy herbicides such as 2,4-D and MCPA is enhanced by addition of a). Nitrate b). Sulphate c). Phosphate d). Chlorate
Last Answer : c). Phosphate
Description : Which herbicide’s mode of action is root growth inhibition? a). Fluchloralin b). MCPA c). Glyphosate d). Alachlor
Last Answer : d). Alachlor
Description : What is the chemical name of MCPA ? a).2-(4-chloro-2 methylphenoxy acid b). 4-(4 chloro-2 methylphenoxy acid c). 4- chloro-2 –methylphenoxy acid d). 2,4-dichlorophenoxy acid
Last Answer : Deep germinating weed seeds are at depth of
Description : To control broad-leaved weeds in barley, which of the herbicide is most suitable a). 2,4-D b). Metsulfuron c). Alachlor d). Both a and b
Last Answer : d). Both a and b
Description : An important benzoic acid herbicide a).Dicamba b). 2,4-D c). Atrazine d). None of these
Last Answer : a).Dicamba
Description : A herbicide move through water conducting tissue a).Paraquat b). DSMA c). Glyphosate d). Atrazine
Last Answer : d). Atrazine
Description : A herbicide move through sap conducting tissue a).Paraquat b). Diquat c). MSMA d). Glyphosate
Last Answer : d). Glyphosate
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 : Herbicide antidote interactions are a). synergistic b). antagonistic c). Enhancement d). None of these
Last Answer : b). antagonistic
Description : A concentrated band of a herbicide about 7 -10 cm below the soil surface is required to control a). Cyperus rotundus b). Convolvulus arvensis c). Oxalis d). All
Last Answer : d). All
Description : Herbicide loss by volatilization increases as which of the following increases a). Vapour pressure b). Soil moisture content c). Soil temperature d). all
Last Answer : d). all
Description : Coupling of intact herbicide molecules with sugars in living plants a). Metabolism b). reverse metabolism c). Conjugation d). None of these
Last Answer : c). Conjugation
Description : A synergistic herbicide combination a). 2,4-D + Docamba b). 2,4-D + atrazine c). Atrazine + alachlor d). All
Description : The most common mechanism of herbicide resistance is a). Enhanced metabolism b). Altered target site c). Sequestration d). All
Last Answer : b). Altered target site
Description : The herbicide susceptible to photodecom position a). Trifluralin b). Ethalfluralin c). Fluchloralin d). All
Description : The effective solution to manage weed shifts a). Herbicide combinations b). Herbicide rotations c). Crop rotations d). All
Description : Present day versatile herbicide to control difficult, perennial, broadleaved weeds and brushes in grasslands a). Alachlor b). Atrazine c). Picloram d). All
Last Answer : c). Picloram
Description : The most commonly used herbicide in rub ber plantation a). Amitrole T b). Paraquat c). Both d). None
Description : a very successful pre-emergence herbicide in banana in India a). Atrazine b). Alachlor c). Glyphosate d). Dalapon
Last Answer : b). Alachlor
Description : Application of which herbicide at 5-10% of emergence in potato is more common in India? a). Paraquat b). Diquat c). EPTC d). Both a and b
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 : A herbicide tolerant to lucerne and can be applied mixed with seed is a). EPTC b). Benefix c). Pendimethalin d). None of these
Description : Selective herbicide under cotton + black gram intercropping system a). Diuron b). Oxadiazon c). Fluchloralin d). All
Last Answer : b). Oxadiazon
Description : A broad-spectrum herbicide in groundnut a). Fluchloralin b). Atrazine c). Alachlor d). 2,4-D
Last Answer : a). Fluchloralin
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
Description : Which is the contact, non-selective and zero persistent herbicide in soils? a). Paraquat b). Atrazine c). 2,4-D d). Bromacil
Last Answer : a). Paraquat
Description : A very potent herbicide for the control of perennial, broad-leaved weed and brushes a). Atrazine b). 2,4-D c). Picloram d). Amitrole
Description : Herbicide residue in soil are undesirable because of a). Injury to sensitive crops b). Accumulate in the produce c). Inhibit soil micro-organisma d). All
Description : Inhibition of electron transfer in photosys tem II is the reason for herbicide action in a). Nitriles b). Ureas c). Both a and b d). None
Last Answer : d). None
Description : Direct contact herbicide application can be achieved by a). Re-circulating sprayer b). Weed wick wiper c). Roller applicator d). All
Description : Herbicide commonly available as fumigant is a). Methyl bromide b). Metham c). Allyl alcohol d). All of these
Last Answer : d). All of these
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 : . Which of the following physiological proc ess influence the herbicide selectivity? a). Absorption and translocation b). Deactivation c). Phytotoxicity d). All of these
Description : . Herbicide deactivation of selectivity in plants is achieved by a). Herbicide metabolism b). Herbicide conjugation c). Both a and b d). None of these
Description : hich is the less toxic herbicide? a). Atrazine b). 2,4-D c). Simazine d). All of these
Description : . Herbicide effectively controls Saccharum and Sorghum halepense only at pre flowering stage a). Diuron b). Atrazine c). Amitrole d). Both a and c
Last Answer : d). Both a and c
Description : The herbicide perform better in sunny days a). 2,4-D b). Paraquat c). Simazine d). All of these
Description : . Herbicide spray drift can be reduced by a). Increasing the droplet size b). Forming a foam c). Making invert emulsion d). All of these
Description : Commonly used wetting agent for herbicide spray in India a). Soap solution b). Teepol c). Uphar d). All of these
Description : . In which herbicide, micro-capsulation for mula is commercially available a). Alachlor b). Metachlor c). Both a and b d). Atrazine
Description : . Commonly used post-emergence herbicide in wheat a). 2,4-D b). Isoproturon c). Atrazine d). Both a and b
Description : A herbicide both soil and foliage active a). 2,4-D b). Isoproturon c). Diuron d). All of these
Description : Which is foliage acting herbicide? a). Glyphosate b). Paraquat c). EPTC d). Both a and b