Multiple Choice QuestionsCreosote is used to prevent:
rusts of wheat
dry rot of wood
loose smut of oats
brown rust of barley
Which of the following insecticide is obtained from the roots of Derris elliptica ?
Cinerin
Nicotine
Rotenone
Pyrethrum
Which of the following gland is often referred in relation with AIDS
Thyroid
Thymus
Adrenal
Pancreas
Which one of the following bacterium is used extensively as biopesticide?
Bacillus subtilis
Bacillus thuringiensis
Streptococcus lactis
Lactobacillus acidophilus
Name one frequently used fungicide
griseofulvin
chloramphenicol
cycocel
ethylene
A.
griseofulvin
Fungicides are the chemicals, which kill fungal pathogen. Griseofulvin produced by Penicillium griseofulvum is toxic to several phytopathogenic fungi, such as those causing powdery mildew, rusts, botrytis and others.
Chloramphenicol is an antibiotic that works by stopping the growth of bacteria. It is used to treat bacterial eye infections.
Cycocel is the most widely used plant growth regulators for ornamentals, including bedding plants and herbaceous crops.
Ethylene is an ageing hormone. It helps the developmental processes such as ripening, senescence and abscission. It also regulates many aspects of growth and development of the plant.
Increase of BOD in water leads to
increase in the dissolved O2 concentration
decrease in the dissolved O2 concentration
maintenance of dissolved O2 concentration at the same level
no effect on dissolved O2 concentration
Genetically engineered bacteria are being employed for production of
thyroxin
human insulin
cortisol
epinephrine
Which one of the following is biological insecticide?
Tiger beetle
Caterpillar
Silkmoth
Mazra poka
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