Agriculture Reference
In-Depth Information
Shift in distribution of host and pathogen is reported as a resultant of
climate change (Mina and Sinha, 2008). Without seed treatment of wheat
diseases like common bunt (
Tilletia caries
) and Karnal bunt (
T. indica
) be-
come important under changing climatic conditions (Oerke, 2006). Change
in disease scenario of chickpea and pigeon pea during last decade has been
documented (Pande and Shanna, 2010). Diseases of minor importance like
dry root rot of chickpea (
Macrophomina phaseolina
) and Phytophthora
blight of pigeon pea (
P. drechsleri
f. sp.
cajani
) have drew the attention
of plant pathologist as a potential threat. Although the raised temperature
is an indicator of increase in disease severity or it paid importance to the
pathogens of minor importance, but quantity of precipitation could act as
deciding factor for disease severity and its spread (Woods et al., 2005).
Bacterial pathogens like
Ralstonia solanacearum
,
Burkholderia glumea,
etc. are of serious impact in those areas where temperature-dependent
strategies do not work (Kudela, 2009). Complex effect of the changing
climate again draws attention to solve or to establish 'new' management
strategies. Viruses are more prone to temperature as well as drought stress
condition. The severity and incidence of maize dwarf mosaic virus and
beet yellows virus were increased observed under drought stress (Clover
et al., 1999; Olsen et al., 1990). Similarly, elevated temperature along with
increased CO
2
concentration in the atmosphere creates hazardous situation
for rice blast (
M. oryzae
), rice sheath blight (
Rhizoctonia solani
) and late
blight of potato (
P. infestans
).
Remarkably climate change may alter genetic shift in the populace of
the pathogen, rate of their development, improve the resistance and physi-
ology in the host to reply severity of disease. Overall, climate change has
the positive, negative, or even neutral impact on the phytopathosystem. It
is due to particular nature of the interaction.
KEYWORDS
•
Air Pollution
•
Climate Change
•
Disease Management
•
Disease Triangle
•
Life Strategy
•
Phytopathosystem
