Impact of ozone and carbon dioxide on growth and development of Chilo partellus swinhoe (maize stalk borer).

摘要

In present study impact of different ozone (O₃) and carbon dioxide (CO₂) levels on growth and development of Chilo partellus on maize (var. HQPM 1) grown in Open top Chambers (OTC) was studied. treatments provided to maize were - ambient air (chamber less plots) having 12-72 ppb O₃ and 370-385 ppm of CO₂-(AO₃+ACO₂); Non Filtered air having 5-10% less O₃ concentration than ambient-(NF); Charcoal filtered air having 80-85% less O₃ concentration than ambient -(CF); Elevated O₃ treatment having ambient O₃+25-30 ppb - (EO₃); Elevated CO₂ (500+or-50 ppm) and non filtered air having 5-10% less O₃ concentration than ambient - (ECO₂+AO₃); Elevated CO₂(500+or-50 ppm) and EO₃(ambient+25-30 ppb) - (ECO₂+EO₃) It was observed that increase in O₃ concentration decreased the mean body weight of larvae (r2=0.52). Mean body weight of larvae was 62% more and 65% less for those which feeded on maize plants exposed to ECO₂+AO₃ and ECO₂+EO₃ respectively as compared to larvae provided with plants exposed to NF air. Development of male and female adults from pupae was observed only from larvae isolated from AO₃+ACO₂ and EO₃+ECO₂ treated plants.