Weed Science and Seed Technology — Agri Master Mind
An ingredient added to a formulation for enhancing the action of toxicant is called?
- Adsorbent
- Antidote
- Adjuvant
- Safeners
- Filler
Is a common safener used in agriculture?
- Naphthalic anhydride
- Gibberellic acid
- NAA
- IBA
- IAA
Spray droplets size_micron is considered as drift susceptible?
- Lower than 150
- Lower than 250
- Lower than 500
- Lower than 300
- Lower than 5
Those weed species that grow primarily in wild communities but often escape to cultivated field, associating themselves closely with man`s affairs. These can be termed as?
- Crop associated weeds
- Obligate weeds
- Facultative weeds
- Noxious weeds
- Objectionable weeds
Which among the following weed`s seed are mixed with mustard seeds and crushed brought death and blindness in human being. Dropsy tragedy has also occurred due to this weed in Delhi in 1998.
- Parthenium
- s. helepens
- Mexican poppy
- Cyprus rotundus
- Convolvulus arvensis
The process of limiting weed infestations so that they have minimal effect on crop growth and yield is termed as?
- Weed Prevention
- Weed Eradication
- Weed control
- Weed management
- Weed elimination
Which among the following bio-herbicide is used against Johnson grass (Sorghum halepanse)?
- Devine
- Collego
- Bipolaris
- Biophos
- All of these
Sorghum Halepense is an exotic weed. It was introduction in India from?
- USA
- Brazil
- China
- Sri lanka
- Israel
Triazine herbicides are said as notorious herbicides because of there?
- Long residual toxicity
- Short residual toxicity
- Non-selectiveness
- Acidic effect in soil
- All of these
Under drylands most preferred herbicide for Maize is?
- Atrazine
- Fluchioralin
- Propanil
- Butachlor
- Paraquat
The complete elimination of all live plant parts and seeds of a weed from a site is called as?
- Weed control
- Weed management
- Weed eradication
- Weed prevention
- None of these
State of seed dormancy under particular temperature and the non dormancy of same seed at another. Temperature is termed as?
- Relative dormancy
- Photo dormancy
- Skoto dormancy
- Thermos dormancy
- None of these
Which among the following physical methods is used to control aquatic weeds?
- Mowing
- Cheeling
- Dredging
- Flooding
- Digging
The seed control order was passed in the year 1983. It is emphasizing the need for?
- Certification
- Seed testing
- License for sale of seed
- Notification
- Free distribution
Which among the following is the process of controlled hydration of seeds to a level that permits pre germinative metabolic activity to proceed, but that prevents actual emergence of the redical?
- Seed dressing
- Seed coating
- Seed pallating
- Seed fortification
- Seed priming
Seed priming
In seed, inner membranous layer is called?
- Testa
- Tegmina
- Integument
- Hilum
- Radicle
Number of seeds to be tested for assessing germination percentage as per ISTA is?
- 400
- 200
- 240
- 1000
- 2000
The widely used nutrient as foliar spray to increase seed set in pulses is?
- NAA
- MH
- Ettirel
- DAP
- CAN
How many seeds of other crops are permissible for the certification of certified seeds of wheat?
- 10
- 20
- 53
- 2
- 15
A process which is done to make small, light and oddly shaped seeds into bold, heavy, more uniform and round seeds so that pelleted seeds can be planted in an accurate and precise way. It can be termed as?
- Seed dressing
- Seed coating
- Seed pelleting
- Seed fortification
- Seed priming
Cynodont dactylon seeds retain viability for?
- 2 years
- 4 years
- 8 years
- 20 years
Alternates host of gram caterpillar?
- Castor
- Red gram
- Wheat
- maize
- Barley
Which weeds is highly drought resistant?
- Cyprus rotundus
- Oxalis latifolia
- Alternanthera echinate
- Amaranthus virdis
- None of these
Which weed known as “TERROR OF BENGAL”
- Lantana canera
- Eichhornia crassipes
- Jussieua repens
- Nymohaea pubescens
- All of these
Club root of cauliflower is caused by plasmodiophora brassicae and alternate host weed is?
- Abutilon spp
- Lantana camara
- Sinapis arvensis
- Cenchrus ciliaris
- Leersia oryzoides
Starvation test is related to which type of weed control management
- Physical control
- Mechanical control
- Chemical control
- Cultural control
- None of these
Example of soil applied herbicide-
- Fluchloralin
- Paraquat
- Glyphosate
- All of these
- Diquat
Innate dormancy is related of -
- Genetically controlled
- Wild oat
- Wild mustrud
- Related to physiological changes
- A & C
Relative weed is related to -
- Other crop plant
- Other variety plant
- Previous crop plant
- All of these
- None of these
Partial root parasite is -
- cascutta
- Striga
- Loranthus
- Orabanche
- Congress grass
Hot water treatment is used to break dormancy in
- Lentil
- Cotton
- Cherry
- None
- Apple
Possible reasons for seed dormancy is
- Cracking of hulls
- Presence of pathogens
- Green distoration
- Immature embryo
- Mature embryo
Seed certification involves
- 1 phase
- 3 phase
- 7 phase
- 5 phase
- 10 phase
Germination is inhibited by
- Red light
- Blue light
- UV light
- IR light
- None of these
The to most important factors influencing the life span of seeds under storage are
- Relative humidity and temperature
- Climate and temperature
- Rainfall and RH
- Seed size and moisture content
- None of these
National seed act passed on 1966 than national seeds corporation was registered on
- 7 april 1963
- 29 December 1966
- 7 march 1963
- None of these
- 5 December 1998
Father of seed testing
- G D smith
- M S Swaminathan
- Frederick nobbe
- S N winogradsky
- Vergis kurian
Isolation distance for hybrid rice seed production in 200m. than rope pulling is practised for good seed set in hybrid seed production of which crop?
- Maize
- Wheat
- Rice
- Onion
- Brinjal
Seed multiplication ratio of pearlmillet is
- 1:20
- 1:100
- 1:200
- 1:40
- 1:1000
Minimum physical purity percent of soybean is?
- 96%
- 99%
- 98%
- 97%
- 91%
Leersia oryzoides is a alternative host of BLB of rice. So tell me who reported three types of dormancy of Wild Oat -
- Jathrotool
- Thurston
- Dr. R.B. singh
- S.R. reddy
- Swaminathan
1,96,000 seed/plant produce by Amaranthus spp. So tell me which weed has highest seed production capacity?
- Amaranthus
- Chenopodium
- Cascuta
- Phalaris minor
- Phalaris
In india highest consuming herbicide is
- 2,4 -D
- Glayphosat
- Isoproturon
- Butachlor
- Alachlor
Non host crop of striga, like cotton secretes strigol (chemical release from roots), which stimulate germination of striga seeds and germ tube fails to have attachment to non host crop this is called_______
- Allelopathy
- Suicidal germination
- Selectivity index
- Annidation
- None of these
Round up is a translocated herbicide and time of application of ronak herbicide
- Pre emergence
- Post emergence
- Pre plant incorporation
- Early post emergence
- None of these
Choose the incorrect option
- Amides – propanil
- Phenoxy carboxylic acid – 2,4-D
- Glycines – gluphosate
- Triazines- diuron
- A and D
Straight forward question, which of the following herbicide belongs to phenyl ureas groups
- Sulfosulfuron
- 2,4-D
- Isoproturon
- Fluchloralin
- A,B and C
Straight forward question, in this type of resistance a weed biotype is resistance to one herbicide due to the presence of distinct resistance mechanism.
- Cross resistance
- Single resistance
- Major gene resistance
- Multiple resistance
- Both C and B
Heavy infestation of which of the following causes poor ploughing performance:-
- Cynodont dactylon
- E. colonum
- Cyprus rotundus
- Orobanche spp.
- None of these
Eichhornia crassipes is introduction in india from south America. It is a floatind weed. Zygogramma bicolorata beetle feed on leaves of:-
- Water hyacinth
- Parthenium
- Lantana
- Canary grass
- None of these
Objectionable weed which produce seeds that are difficult to separate once mixed in crop seed satellite weeds of barle is
- Convolvulus arvensis
- Argemone maxicana
- Allium canadense
- Avena fatua
- Congress grass
Total root parasite weed mustard sunflower is Broomrape than partial root parasite of Maize crop is
- Orobanche
- Striga
- Loranthus
- None of these
- Only A and B
Growing of plant in main crop due to seed shading from the previous sown crop
- Volunteer plant
- Rogue weed
- Relative weed
- Absolute weed
- None of these
Tok-E-25 is trade name of -
- Propanil
- Glyphosate
- Metribuzine
- Nitrofen
- Sulfosulfuron
Weedar is trade name of -
- 2,4 D (Amine salt)
- 2,4 D (Easters)
- 2,4 D (No salt)
- 2,4 DB
- None of these
Zero persistent herbicide -
- Glyphosate
- 2-4 D
- Propanil
- Triazines
- Phorate
Which pair of herbicide is a group of non selective ?
- Paraquat & Atrazine
- Diquat & glyphosate
- Glyphosate & metribuzin
- Paraquat & propanil
- None of these
In india consumption order
- Herbicide>insecticides>fungicides
- Insecticides>herbicides>insecticides
- Insecticides>herbicides> fungicides
- Insecticides> fungicides> herbicides
- None of these
Drift hazard in joining pulse crop is due to spray of..
- DNOC
- 2,4-D
- MCPB
- BLW
- Diquat
Carrot grass introduction from USA, 1954. Phalaris minor introduction from
- S. E. Asia
- S.W. Asia
- South America
- North America
- None of these