Papers by Chandni Patel Valodkar
Journal of entomology and zoology studies, 2018
An appraisal of butterfly species diversity was made around a Nationally Important Wetland - Wadh... more An appraisal of butterfly species diversity was made around a Nationally Important Wetland - Wadhwana Irrigation Reservoir (WIR) in the semi-arid zone of Central Gujarat as a model geographical area. A checklist of the butterflies observed around the wetland was prepared and monitored for a span of three years (2008-2011). The species recorded were given abundance rating according to their encounter frequency. A total of 42 species were observed around the reservoir dominated by Nymphalidae (38%) over Pieridae (31%), Lycaenidae (21%) and Papilionidae (10%). Three species were rated as abundant while majority of the species were rated either rare or uncommon. The density of the butterflies varied with the seasons and family significantly. It is apparent that the reservoir can sustain diverse butterfly species which includes species requiring conservation efforts. Considering the landscape, steps to enhance the conservation should be adopted to maintain butterfly diversity and sustain...
Advances in Entomology, 2015
The whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae) is one of the most devastating agricultural... more The whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae) is one of the most devastating agricultural pests in many cropping systems worldwide. Growers rely on the use of insecticides to control this pest. However, some insecticides do not reduce the feeding of B. tabaci fast enough to prevent the direct and indirect damage produced by this insect. The effect of a new insecticide, cyantraniliprole 10OD (Cyazypyr™), on the feeding of B. tabaci adults, was studied under laboratory conditions. Cyantraniliprole 10OD is an insecticide that belongs to the IRAC Group 28 with a new mode of action for sucking insects, which provides rapid feeding cessation by impairing muscle function, resulting in reduced transmission of important insect vectored crop diseases. Laboratory experiments were conducted to determine the effect of cyantraniliprole along with some other commercially available insecticides on the feeding of B. tabaci adults by measuring the excretion of honeydew as an indirect assessment of insect feeding. In these experiments, cyantraniliprole resulted in significantly higher reduction of honeydew excretion (64.0%) by Q biotype B. tabaci adults during the first 30 minutes of exposure than diafenthiuron, triazophos, acetamiprid and spiromesifen, with all treatments having no adult mortality. Observations between 1 and 48 hours after exposure indicated that cyantraniliprole had numerically higher or similar reduction in honeydew production as the other insecticides, but by 48 hours (mid and high rate) and 96 hours (high rate) of exposure, cyantraniliprole had significantly higher reduction of honeydew excretion than all other insecticides tested. Low adult mortality was observed during first 24 hours of exposure in all treatments. Cyantraniliprole resulted in numerical or significantly higher adult mortality than all other treatments at the later observation intervals (72-96 hours). The higher reduction in honeydew excretion by cyantraniliprole appeared to be related to faster feeding cessation during the initial hours of exposure by a combination of feeding cessation and direct mortality as the exposure time R. S. Rattan et al. 57 increased. These findings document significant effects of cyantraniliprole on feeding cessation in Bemisia tabaci.
The whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae) is one of the most devastating agricultural... more The whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae) is one of the most devastating agricultural pests in many cropping systems worldwide. Growers rely on the use of insecticides to control this pest. However, some insecticides do not reduce the feeding of B. tabaci fast enough to prevent the direct and indirect damage produced by this insect. The effect of a new insecticide, cyantranili-prole 10OD (Cyazypyr™), on the feeding of B. tabaci adults, was studied under laboratory conditions. Cyantraniliprole 10OD is an insecticide that belongs to the IRAC Group 28 with a new mode of action for sucking insects, which provides rapid feeding cessation by impairing muscle function, resulting in reduced transmission of important insect vectored crop diseases. Laboratory experiments were conducted to determine the effect of cyantraniliprole along with some other commercially available insecticides on the feeding of B. tabaci adults by measuring the excretion of honey-dew as an indirect assessment of insect feeding. In these experiments, cyantraniliprole resulted in significantly higher reduction of honeydew excretion (64.0%) by Q biotype B. tabaci adults during the first 30 minutes of exposure than diafenthiuron, triazophos, acetamiprid and spiromesifen, with all treatments having no adult mortality. Observations between 1 and 48 hours after exposure indicated that cyantraniliprole had numerically higher or similar reduction in honeydew production as the other insecticides, but by 48 hours (mid and high rate) and 96 hours (high rate) of exposure, cyantraniliprole had significantly higher reduction of honeydew excretion than all other insecticides tested. Low adult mortality was observed during first 24 hours of exposure in all treatments. Cyantraniliprole resulted in numerical or significantly higher adult mortality than all other treatments at the later observation intervals (72-96 hours). The higher reduction in honeydew excretion by cyantraniliprole appeared to be related to faster feeding cessation during the initial hours of exposure by a combination of feeding cessation and direct mortality as the exposure time R. S. Rattan et al. 57 increased. These findings document significant effects of cyantraniliprole on feeding cessation in Bemisia tabaci.
This study reports the annual and seasonal changes in water quality of two reservoirs inundated w... more This study reports the annual and seasonal changes in water quality of two reservoirs inundated with Narmada river water in Vadodara district, Gujarat, India. Surface water samples were collected on seasonal basis from February 2009 to January 2011 and were analyzed for 15 water quality parameters. Most significant parameters which contributed in annual and seasonal variations were assessed by Principal components/Factor Analysis (PCA/FA) which identified three factors with86.11% and 80.56% of the total variance of the sampled data at TIR and JIR respectively. Results of this study demonstrate that the water quality of wetlands has a direct and close association with the surrounding environment.
An appraisal of butterfly species diversity was made around a Nationally Important Wetland-Wadhwa... more An appraisal of butterfly species diversity was made around a Nationally Important Wetland-Wadhwana Irrigation Reservoir (WIR) in the semi-arid zone of Central Gujarat as a model geographical area. A checklist of the butterflies observed around the wetland was prepared and monitored for a span of three years (2008-2011). The species recorded were given abundance rating according to their encounter frequency. A total of 42 species were observed around the reservoir dominated by Nymphalidae (38%) over Pieridae (31%), Lycaenidae (21%) and Papilionidae (10%). Three species were rated as abundant while majority of the species were rated either rare or uncommon. The density of the butterflies varied with the seasons and family significantly. It is apparent that the reservoir can sustain diverse butterfly species which includes species of requiring conservation effort. Considering the landscape, steps to enhance the conservation should be adopted to maintain butterfly diversity and sustain the ecosystem services derived from them.
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Papers by Chandni Patel Valodkar