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S. Podder

Bio: S. Podder is an academic researcher from Government College. The author has contributed to research in topics: PEST analysis & House dust mite. The author has an hindex of 2, co-authored 2 publications receiving 5 citations.

Papers
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01 Jan 2009
TL;DR: The conditions used in the rearing experiments may be considered optimal for maintaining culture of D. pteronyssinus.
Abstract: The life cycle of Dermatophagoides pteronyssinus was studied at 25 O C and 80% relative humidity. Observation was made on freshly laid eggs until they develop into adults and periods between different stages were recorded. The eggs required an average 11.26 days to develop into adults. The ranges of life longevity of mated males and females were 18-64 days and 20-54 days, respectively. The conditions used in the rearing experiments may be considered optimal for maintaining culture of D. pteronyssinus.

3 citations

Journal ArticleDOI
TL;DR: The life cycle of the tea red spider mite, Oligonychus coffeae, Nienter was studied on tea leaves in Darjeeling under laboratory conditions at 20°C and 65% relative humidity and will hopefully help to devise a management strategy for this pest species.
Abstract: The tea plant, Camellia sinensis (L.), has been cultivated since ancient time and is host to several pest species that can significant reduce productivity. One such pest species is the tea red spider mite. The life cycle of this species, Oligonychus coffeae, Nienter was studied on tea leaves in Darjeeling under laboratory conditions at 20°C and 65% relative humidity. Observations were recorded on freshly laid eggs on tea leaves and continued until individuals reached adulthood. The eggs required an average of 16.17 days to develop into adults. The average longevity of adult was 28.67 days. Our findings contribute to the understanding of mite abundance and population fluctuations in different seasons and climates, and will hopefully help to devise a management strategy for this pest species.

2 citations


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01 Jan 2016

12 citations

Journal ArticleDOI
TL;DR: The increase in phenolic and alcoholic components and decrease in Chl contents may affect the quality of Darjeeling tea and the extent of damages done by the pests measured here could aid the pest management in tea gardens.
Abstract: Introduction Darjeeling tea of India is one of the most famous beverages globally. However, a large amount of tea crop is damaged every year by the attack of mites. Objectives The study aimed to determine the changes in different pigments and biochemical components of tea leaves due to mite infestation. Materials and methods We used UV-visible and Fourier-transform infrared (FTIR) spectroscopy simultaneously to understand the damages in pigment contents of the leaves of tea (Camellia sinensis (L.) Kuntze) due to attack of phytophagus mite, Oligonychus coffeae Nietner. Furthermore, chemical analysis of infested tea leaves was also performed to compare the nutrients of the plants, namely total phenol, protein and soluble sugar. Results The UV-visible study reveals severe reduction of the pigments such as chlorophyll (Chl), carotenoids and xanthophylls in the tea leaf due to mite infestation. The findings of the FTIR study, also shows variation in different physiochemical components in the leaf Chl. The sugar and protein content of the infested leaves have been reduced compared to uninfested ones. Results in the case of tea leaves plucked during first (March) and third (November) flushes show similar trends. Conclusion The increase in phenolic and alcoholic components and decrease in Chl contents may affect the quality of Darjeeling tea. The extent of damages done by the pests measured here could aid the pest management in tea gardens.

6 citations

Journal ArticleDOI
TL;DR: It appears that C. buchanani is better host among the two hosts as because the life cycle was completed in shorter time, recording high fecundity and longer longevity.
Abstract: The present paper reports duration of different developmental stages as well as fecundity, longevity, oviposition periods, sex ratio, etc. of Tetranychus sayedi Baker & Pitchard on two medicinal plants, viz. Cryptolepis buchanani Roem & Schult and Justicia adhatoda L. under laboratory condition at 27.5 °C and 65% R.H. during February-March, 2016. The two hosts in which the life cycle was studied form two new records of hosts for this mite. It appears that C. buchanani is better host among the two hosts as because the life cycle (egg to adult) was completed in shorter time, recording high fecundity and longer longevity.

2 citations