Agriculture Reference
In-Depth Information
under climate change. Accordingly, this issue will assist us to choose best
and optimized way in plant disease management.
10.9 CONCLUSION
Limited efforts have been attempted on role of climate change on phy-
topathosystems. Therefore, efficacy of physical, chemical and biological
control means must be evaluated. This may include disease-resistant variet-
ies and aspects on changing climate in research priorities. Considering the
phytopathosystems climate change is not an isolated issue but such prob-
lem is always there with every system (e.g., agriculture) over period. The
changing climate is associated with changes in phytopathosystems through
responses of the host, the overall pathosystem, and the specific environ-
mental condition. Under this changing scenario the elevated level of CO
2
has been contributed to reduced aggressiveness of a few studied pathogens.
Therefore, a significant reduction in disease severity may be observed for
such phytopathosystems under rising CO
2
concentration. This is important
information that may be plant responses that could be used for breeding
programs. However, fecundity of the pathogen may increase (Table 10.1);
thus, change in aggressiveness may certainly applicable in order of patho-
gen evolution under accelerated CO
2
condition. In this regard development
of the alternatives of management strategies are imposed.
TABLE 10.1
Effect of CO
2
Concentration or Temperature Variation on Pathogen Biology
Pathogen
Observation
Worker
Increased level of CO
2
delayed
germtube growth and increased
fecundity
Colletotrichum gloeospori-
oides
Chakraborty et al.
(2000)
Increased CO
2
amplified the
pathogen biomass
Phytophthora parasitica
Jwa and Walling (2001)
No effect of CO
2
in leaf area
development covered by
pustules
Tiedemann and Firsch-
ing (2000)
Puccinia recondita
Fecundity was unchanged
under high level of CO
2
Chakraborty et al.
(2010)
Puccinia striiformis
Latent period was positively
correlated with increased
temperature
Puccinia striiformis
Milus et al. (2009)
