Weedicides & Weeds Important Table-1

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Weedicides & Weeds Important Study Point

Subject:- Weed Science

Weedicides & Weeds Important Study Point

1.Quality parameters for irrigation water

2.Differences between Dry Farming and Rainfed Farming

Dry Farming	Rainfed Farming
Rainfall less than 750 mm	Rain fall more than 750 mm
Rainfall distribution is erratic	Rainfall is well distributed
PET (Potential Evapo Transpiration) exceeds rainfall	Rainfall is more than PET
Arid and semiarid climate	Humid and temperate climate
Crops are subjected to severe moisture stress	Crops don’t face moisture stress
Soil moisture conservation are important	Runoff and erosion control are important

3.Weeds act as host for insect pest and disease

4.Vegetative propagation of weeds

5.WEED CONTROL BY BIO-AGENTS

Weed species	Agent
Salvinia molesta (water fern)	Curculinoid weevil, Crytobagus singularis
Tribulus terrestris	Microlarinus lypriformis, M. lareynil
Opuntia dilleni	Cochineal scale insect- Dactylopius tomentosus
Lantana camara	Crocidosema lantana, Teleonemia scrupulosa
Parthenium hysterophorus	Zygogramma bicolarata

Bio-herbicies:- The bio-herbicide approach involves spray of specific fungal spores or its fermentation products against the target weed. These preparations are called Mycoherbicides’.
Non-specific agents:- White amur feeds several weed species Lemna, Hydrilla, Potamogeton. Besides silver carp, common carp also feed large amount of algae.

6.Mycoherbicides and target weed

Product	Content	Target weed
Devine	Phytophthora palmivora	Strangle vine, Morrenia odorate in citrus
Bipolaris	Bipolaris sorghicola	Jhonson grass- Sorghum halepens
Bilophos hygoscopius	Steptomyces general vegetation	Non-specific
Collego	WP of fungal spores of Colletotrichunm gleosporiodes.	It cause stem & leaf blight.

7.Phenomenon

Term	Definition
Isobar	Imaginary lines connecting points of equal atmospheric pressures.
Isohytes	Imaginary lines connecting points of equal amounts of rainfall.
Isochrone	Imaginary lines connecting points of same times.
Isobath	Imaginary lines connecting points of equal water table elevations.
Isohels	Imaginary lines connecting points of equal sunshine hours.
Isopleuth	Imaginary lines connecting points of equal evaporation values.
Isostere	Imaginary lines connecting points of constant moisture contents.
Isogonals	Imaginary lines connecting points of same magnetic destination.
Isophene	Imaginary lines connecting points of similar seasonal phenomenon.
Isoseismals	Imaginary lines connecting points of equal seismic activities.
Isotherm	Imaginary lines connecting points of equal temperatures.
Isotach	Imaginary lines connecting points of equal wind velocities.
Contour	Lines joining point of equal elevations
Isopleths	Line joining uniform values of any phenomena
Isopluvial	Lines joining equal depth of rainfall
Isotope	Elements having equal number of neutrons
Isodemic	Lines which join the places of similar disease severity
Isoclines	A curve connecting the least cost combinations of input for all output

8.ICAR Awards

Award Name	Field	Periodicity
Hari Om Ashram Trust Award	Published research in Crop Science, Horticulture and Animal sciences	Biannual
Vasantrao Naik Award	Water Conservation & Dry land farming	Annual
Outstanding Women Agricultural Scientist Award	To encourage ICAR woman scientists	Annual
Jawaharlal Nehru Award	Best Ph.D. in the field of Agricultural & Allied Sciences	Annual
Rafi Ahmed Kidwai Memorial Award	Agriculture, Animal Husbandry and Allied Sciences	Two years
Fakruddin Ali Ahmed Award	Agricultural Research in Tribal area	Two years
ICAR Young Scientist	In the field of Agricultural & Allied Sciences	Two years
Outstanding Teacher Award (for 8 personalities)	Agricultural & Allied fields	Two years
ICAR Team Award	For disciplinary research work in Agricultural & Allied fields	Three years

9.Weedicides in Field and Horticultural crops

Weedicides & Weeds Important Study Point

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