Weed Management MCQ for Competitive Exam – 6

Q.1.Trade name of Nitrofen ?


b).Toke – E – 25

c).Round up

d).Plant guard

Q.2.Which herbicide belong to pyridines group ?

a). Picoloram

b). Dicamba

c). Chloramben

d). Imazethapyn

Q.3.Metsulfron herbicide belong to which group

a). Sulfonylureos

b). Pyridines

c). Benzoic

d). Carboxalic group

Q.4.Triallate herbicide belong to which group?

a). Triazines

b). Benzoic


d). Uracils

Q.5.Paraquat herbicide belong to which group

a). Bipyridylium

b). Benzoic

c). Carboxalic

d). Uraciles

Q.6. Which of the plants will show more susceptibility to herbicide application?

a). Stressed

b). Healthy

c). Old

d). all

Q.7. The weather condition is optimum for herbicidal weed control?

a). High temperature low humidity

b). High temperature high humidity

c). warm temperature high humidity

d). cold temperature low humidity

Q.8. The type of soils which require higher dose of herbicides to be effective is

a). Inceptisols

b). Histosols

c). Oxisols

d). Ultisols

Q.9. The ideal temperature for application of post-emergent herbicides is in the range of

a). 150C to 200C

b). 150C to 250C

c). 180C to 300C

d). 250C to 350C

Q.10. Volatilisation losses are more in which of the following condition

a). Cold

b). Warm

c). Humid

d). Dry

Q.11. Highly soluble herbicides like 2,4-D salt, Dalapon and TCA have to be avoided in which of the soil type

a). Peat

b). Red

c). Clay

d). Sandy

Q.12. Herbicides prone to photodecomposition such as Trifluralin, monuron, chloramben and PCP should be applied in

a). Morning

b). Evening

c). Afternoon

d). all

Q.13. The greatest factor affecting herbicide adsorption is

a). pH

b). Salt

c). SOM

d). Soil nutrient

Q.14. Which type of clay will adsorb more herbicide?

a). Montmorillonite

b). Illite

c). Kaolinite

d). b & c

Q.15. Montmorillonite clays adsorb more herbicide as compared to other clays due to

a). Expanding lattices

b). more surface area

c). More negatively charged sites

d). All

Q.16. Herbicides are more tightly bound to soils under which of the condition

a). Field capacity

b). Saturated

c). Both a and b

d). Dry

Q.17. Herbicides are less effective on weeds under which of the soil condition

a). Field capacity

b). Saturated

c). Both a and b

d). Dry

Q.18. Which of the following herbicides will be tightly bound to the soil?

a). Trifluralin KOC(mL/g)= 7000

b). Paraquat KOC(mL/g)= 10,00,000

c). Glyphosate KOC(mL/g)= 24,000

d). Alachlor KOC(mL/g)= 124

Q.19. Herbicide leaching is prominent in

a). Sandy

b). Sandy loam

c). Clay loam

d). loam

Q.20. Pesticide Leaching Potential (PLP) is based on

a). Water solubility

b). Tendency for adsorption

c). Both a and b

d). pH 

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