effect of climate change effects on anthropods
TRANSCRIPT
Effect of temperature on parasitization potential and longevity of Helicoverpa armigera larval
parasitoid, Campoletis chlorideae, and its sex ratio (M: F).
Current estimates of climate change have projected an increase in mean annual temperatures of 1oC by 2025, and 3oC by
the end of the next century, while the amounts of CO2 will double between 2025 and 2070. Global warming and climate
changes will influence:
• Activity, diversity, and abundance of arthropods
• Geographical distribution of insect pests
• Over-wintering, development, and population dynamics
• Expression of host plant resistance to insects
• Synchrony between plants and insect pollinators
• Reduced effectiveness of crop protection technologies
Climate change effects on geographical distribution of pod borer Helicoverpa
armigera (pink dots) and spotted pod borer Maruca vitrata (blue dots).
10
15
20
27
(c
on
tro
l) S1S2
S3S4
0
2
4
6
8
10
12
14
16
Incubation
period (days)
Incubation temperature
(OC)
Egg-age at
storage (days)
32
10
Effect of temperature on incubation period of Helicoverpa armigera.
Population dynamics of Oriental armyworm, Mythimna separata is influenced by rainfall pattern and cyclonic
storms in the Bay of Bengal. Sorghum head bug, Calocoris angustatus population density is influenced by weather
conditions over the previous two weeks, while population and incidence of H. armigera in southern India is
influenced by the amount of rainfall during the rainy and the postrainy seasons.
0
10
20
30
40
50
60
70
80
90
100
De
ad
he
art
s (
%)
5 D
X 1
06
IS 2
3509
ICS
V 4
01
ICS
V 1
12
Mean
Genotypes
Dead hearts (%) Irrigated
Dead hearts (%) Drought
Effect of drought on expression of resistance to spotted stem borer, Chilo partellus in sorghum
(KARI, Kiboko, Kenya).
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
0
0.1
0.2
0.3
0.4
0.5
January February March April
Tem
pera
ture
ºC
/ R
H (%
)
La
rva
l w
eig
ht
(mg
)
Planting date
Mech 184 NCS 207 RHmin Tmin Tmax
Effect of climatic factors on expression of resistance (larval weight) in Bt transgenic cotton to Helicoverpa armigera.
Feb 2013
Climate Change Effects on Arthropods: Implications for Pest Management
`
Emerging pest problems: a) Ceroplastodes cajani, b) Leaf miner, c) Mealybug, d) Bemisia tabaci,
e) Mealybug on chickpea, f) Spider mite on sorghum and g) Spodoptera exigua damage on chickpea.
a c
e
b
d f
g
ICRISAT is a member of the CGIAR Consortium
0
1
1
2
2
3
3
4
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
Standard weeks
No
. o
f m
oth
s t
rap
ped
nig
ht
-1
0
10
20
30
40
50
60
No
. o
f m
oth
s t
rap
ped
nig
ht
-1
1
97
7-7
8
1976 1979 1980 1977 1978
HC Sharma*, RS Munghate and SP Sharma, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru 502 324, Telangana, India. *Email: [email protected]