Papers by Arunava Samanta
Journal of entomology and zoology studies, 2017
The present research was undertaken to study the population dynamics of whitefly (Bemisia tabaci ... more The present research was undertaken to study the population dynamics of whitefly (Bemisia tabaci Genn.) infesting tomato (Lycopersicon esculentus L.) and their sustainable management using biopesticides. The maximum population level was maintained during 11th standard week to 18th standard week that is during 2nd week of March to 3rd week of March with peak population (0.47/leaf) was recorded. Weekly population counts on white fly showed non-significant negative correlation (p=0.05) with temperature and weekly total rainfall where as significant negative correlation with relative humidity. The insecticide acetamiprid was found most lethal against whitefly providing 76.59% suppression, closely followed by extracts of neem + Spilanthes providing 62.39% suppression. Neem and Spilanthes individually did not produce good results but when used as a mixture they recorded better results. Highest yield (30.15 t/ha) were recorded from acetamiprid treated plots followed by neem + Spilanthes (2...
Studies on the effect of different abiotic factors and bio-efficacy of different chemicals on yellow mite, Polyphagotarsonemus latus (Banks) infesting jute
Journal of entomological research, 2008
Studies conducted on the effect of different abiotic factors and bioefficacy of pesticides on yel... more Studies conducted on the effect of different abiotic factors and bioefficacy of pesticides on yellow mite, Polyphagotarsonemus latus (Banks) infesting jute revealed that temperature showed a significant positive correlation with the mite population/leaf and maximum mite population was recorded during July when the temperature ranges between 27.8–29.2°C while Fenpyroximate @ 40 gm a.i./ha proved most effective in controlling the mite population.
Efficacy of fenpropathrin (30 E.C.) against Aphis gossypii (Glov.) infesting chilli (Capsicum annuum L.)
Journal of entomological research, 2006
The efficacy of fenpropathrin 30 E.C. (Meothrin) was evaluated in four different concentrations (... more The efficacy of fenpropathrin 30 E.C. (Meothrin) was evaluated in four different concentrations (0.025%, 0.050%, 0.075% and 0.10%) along with imidacloprid 200 S.L. (Confidor) at 0.025%, and dimethoate 30 E.C. against the chilli aphid, Aphis gossypii (Glov.). Fenpropathrin 30 EC at 0.1% was most effective dose in reducing aphid population to 90% and gave maximum higher green chilli yield (95.16 q/ha) followed by fenpropathrin at 0.75% and imidacloprid at 0.025%. Dimethoate at 0.2% and fenpropathrin 0.025% proved less effective.
Borer pests: a major threat to minor fruit crops
Bracon: a potential tool for integrated pest management
Journal of Interacademicia, 2016
Studies on the residues fate of quinalphos, methomyl and alpha-cypermethrin in paddy under West Bengal conditions
Journal of entomological research, 2006
Field studies conducted with three insecticide viz, quinalphos, methomyl and alpha-cypermethrin a... more Field studies conducted with three insecticide viz, quinalphos, methomyl and alpha-cypermethrin at their recommended and double the recommended dosages to detect residues in grain and straw at harvest revealed that no residues could be detected in harvested paddy irrespective of treatments and insecticides. Methomyl dissipated at faster rate in comparison to quinalphos. Both quinalphos and methomyl reached BDL 15 days after final spraying in grain and straw. On the other hand alpha-cypermethrin reached BDL 21 days after final spraying.
Residues of Different Insecticides in/on Brinjal and Their Effect on Trichogramma spp
Pesticide Research Journal, 2006
Dissipation of residues of quinalphos @ 500 and 1000 g ai ha−1a methomyl @ 400 and 800 g ai ha−1 ... more Dissipation of residues of quinalphos @ 500 and 1000 g ai ha−1a methomyl @ 400 and 800 g ai ha−1 and alphacypermethrin @ 30 and 60 g ai ha−1 were studied in/on brinjal (var. Muktakeshi) under field conditions at Kalyani, West Bengal during kharif season of 2000–2001. In all, five sprays were given at 15 d interval. The initial residues on brinjal fruits after the last spray were to the magnitude of 4.78 and 6.98 μg g−1 for quinalphos, 3.98 and 5.65 μg g−1 for methomyl and 0.755 and 1.02 μg g−1 for alphacypermethrin for lower and higher doses, respectively. The residues dissipated with the half-life of 1.1–1.5 d for quinalphos, 1.0–1.4 d for methomyl and 1.8–2.4 d for alphacypermethrin. The residues reached BDL after 10 d for lower dose and 15 d for hiqher dose for all the insecticides. The safe waitina periods (TMRL) determined for brinjal were within 4.8–7.4 d, 4.4–6.5 d and 1.3–3.0 d for quinalphos, methomyl and alphacypermethrin, respectively. Fruit samples of 1–5 d showed the preseece of quinalphos oxon in amounts ranging from 0.00–0.04 μg g−1. Decontamination processes like washing and cooking dislodged 28.2–76.1% residues depending go insecticides and doses whereas 21.1–60.1% surface residues was removed by washing alone. The study yo residual toxicity to the egg parasitoids Trichogramma chilonis Ishii and Trichogramma japonicum Ashmead showed that the insecticides differed considerably in their persistency, period of efficicacy and index of persistent toxicity (PT value) towards both the species. Based on PT value, alphacypermethrin was found to be safest towards both the parasitoids. Considering the retention period of toxic residues, both the parasitoids could be released in the crop ecosystem after 3–5 d of alphacypermethrin spray, 4–6 d of methomyl spray and 6–7 d of quinalphos spray depending upon treatment doses and parasitoid species.
Population dynamics of major insect pests and their natural enemies on cabbage under new alluvial zone of West Bengal
The Journal of Plant Protection Sciences, 2013
ABSTRACT Population dynamics of major insect pests and their natural enemies on cabbage were stud... more ABSTRACT Population dynamics of major insect pests and their natural enemies on cabbage were studied at Bidhan Chandra Krishi Viswavidyalaya (BCKV), Kalyani, West Bengal(India) during rabi season of 2011-12 and 2012-13. Experi-ment was laid out in Randomized Block Design with three replications. Cabbage (cv Rareball) seedlings were transplanted in the plot of 9 m2 area with 45cm x 45cm spacing. Observation was recorded at weekly interval from randomly selected five plants /plot. Peak population of diamond back moth (DBM) was recorded on 1st March and 23rd February with13.60 and 14.33 larvae /plant during 2011-12 and 2012-13 respectively. Cabbage aphid reached its peak on 9th February (14.17 aphids/inch2 leaf) and 16th February (11.03 aphids/inch2 leaf) of 2011-12 and 2012-13, respectively. Highest parasitized larvae of diamond back moth by Cotesia plutellae were found on 15th and 8th March with 10.42 and 10.50% larval parasitisation during both the seasons, respectively, whereas maximum coc-cinellid was observed on 23rd February of 2011-12 and 2012-13 crop seasons with 11.67 and 9.67 coccinellids/ 5plants, respectively. Both maximum and minimum temperature had major role to build up the population of dia-mond back moth, C. plutellae and coccinellids beetle while aphid population was enhanced only by maximum tem-perature. Relative humidity and rainfall had negative influence on pests and natural enemies during the study pe-riod.
EVALUATION OF SOME NEW INSECT GROWTH REGULATORS AND INSECTICIDES AGAINST CHILLI FRUIT BORER (Spodoptera litura Fab.)
Pest Management in Horticultural Ecosystems, 2008
The efficacy of six new insecticides viz., emamectin benzoate, indoxacarb, methoxyfenozide, noval... more The efficacy of six new insecticides viz., emamectin benzoate, indoxacarb, methoxyfenozide, novaluron, lufenuron and fipronil against chilli fruit borer (Spodoptera litura Fabr.) was evaluated during rabi, 2006–07. In the field experiment, highest mean reduction of fruit borer population was recorded in novaluron (95.75%) treated plots, followed by fipronil (91.95%), indoxacarb (90.35%), lufenuron (89.75%), emamectin benzoate (87.5%) and methoxyfenozide (86.4%). Relative toxicity of these six insecticides against the third instar larvae of S. litura was evaluated under laboratory conditions. The order of relative toxicity after 24 hours of exposure was emamectin benzoate (144.929) > indoxacarb (93.933) > fipronil (5.410) > novaluron (1.488) > lufenuron (1.037) > methoxyfenozide (1.000). With the increase of exposure time upto 48 hours, all the chemicals showed steady decrease in LC50 values.
Persistent Toxicity of Different Insecticides to Trichogramma and Bracon on Guava Leaves
Pesticide Research Journal, 2007
An experiment was conducted at BCKV, Kalyani to study the persistent and residual toxicity of 8 i... more An experiment was conducted at BCKV, Kalyani to study the persistent and residual toxicity of 8 insecticides to the egg parasitoids Trichogramma japohicum Ashmead and larval parasitoid Bracon hebetor Say following standard bioassay techniques and PT values were worked out in each case to identify relatively safer insecticides to formulate a guideline regarding introduction of natural enemies in pesticide treated guava orchard. Endosulfan, quinalphos, monocrotophos and methomyl (@ 0.05%) and cypermethrin, alpha cypermethrin, deltamethrin and fluvalinate (@ 0.005%) were sprayed on guava crop just before flowering. The insecticides differed considerably in their persistence, period of efficacy and index of persistent toxicity (PT) towards all the parasites. Tolerance of T. chilonis was much more than T. japonicum irrespective of the pesticide. Alpha cypermethrin was found to be safer in all cases followed by deltamethrin. Considering the retention period of toxic residues, both the species of Trichogramma could be released in the crop ecosystem after 3–5 days for alpha cypermethrin and fluvalinate, 4–6 days for endosulfan, monocrotophos and deltamethrin spray and 7–8 days of methomyl, quinalphos and cypermethrin spray. In case of Bracon each insecticide persisted for a lesser period than that of Trichogramma.
Effectiveness of Multimedia Approach for Teaching-Learning of Physical Science at Secondary Level in Rural Areas
Social Science Research Network, 2020
The focus of the study examined the effect of Interactive Multimedia Approach on student achievem... more The focus of the study examined the effect of Interactive Multimedia Approach on student achievement in general science as compared to traditional method of instruction. An experiment was conducted with 9lh class students of session 2017 studying Physical Science at Harijhama high School in rural area under West Bengal Board of Secondary Education (WBBSE) Multimedia program for the experiment was developed by the researcher using interactive multimedia mode of presentation covering two chapters from the textbook of Physical Science for secondary classes. Each mode comprises a text segment in Physical Science followed by multiple choice questions and immediate feedback. <br><br>Secondary school students studying science subjects constituted the population of the study. The students of 9th class of Harijhama High School, Harijhama, Purba Medinipur, were selected as sample of the study. Only students studying Physical Science as science subject were included in the sample. Sample students were assigned to two group’s i.e. experimental group and control group. Both the groups were equated on the basis of their achievement scores in previous examination in the subject of Physical Science. Each group comprised 20 students. There were two different treatment patterns applied during the experiment. Both the groups were taught through routine method by the same teacher. The multimedia approach was used as additional strategy for the experimental group. During the experiment period, the experimental group received the treatment of independent variable, i.e. multimedia approach whereby the experimental group was exposed to certain web-cites consisting of multimedia. In the mean while he control group was kept busy in other activities such as guided practice and independent practice. This was adopted to control the variable of time and to realize the primary objective of the study. The experiment continued for six weeks. <br><br>In order to find out treatment effects, a teacher-made post-test was administered to the experimental as well as control group immediately after the treatment (teaching) was over. The purpose of this test was to measure the achievement of the students constituting the sample of the study. Final data were collected from 40 students, 20 from each group from each school.To evaluate the multimedia program in terms of students' opinion was administered to the experimental group students. Null hypotheses were tested by analyzing the data on achievement test. Paired t-test was applied to determine the significance of difference between the mean achievement scores of the experimental and the control groups. <br><br>The results revealed that the experimental group outperformed the control group in all the achievement areas i.e. overall, by levels of cognitive domain and by type of content. Achievement scores by the intellectual capacity groups of the experimental group were generally in accordance with their intellectual capacity, grade. Students liked the multimedia program and benefited for it. They found it better mode of instruction than the traditional method. Efforts are being made on the part of the government to expand computer facilities in schools. Expansion in computer literacy, a computer education and computer facilities warrants the need of interactive multimedia.<br>
Journal of Pharmacognosy and Phytochemistry, Sep 1, 2017
Field evaluation on efficacy of fipronil 5% SC against early shoot borer (Chilo infuscatellus Sne... more Field evaluation on efficacy of fipronil 5% SC against early shoot borer (Chilo infuscatellus Snellen) and root borer (Emmalocera depressella Swinhoe) in sugarcane was conducted during 2013. Among the treatments, fipronil 5% SC @ 150 g a.i./ha was found most effective against early shoot borer and root borer where minimum dead hearts (4.29, 3.20 and 2.23%) were recorded after first, second and third spraying, respectively. Fipronil 5% SC @ 100 g a.i./ha was registered the next best treatment in reducing dead hearts after first (4.66%), second (3.74%) and third (2.59%) application followed by fipronil 5% SC @ 90 g a.i./ha (5.05, 3.93 and 2.76%) and fipronil 5% SC @ 75 g a.i./ha (5.18, 4.08 and 3.11%), respectively. Fipronil 5% SC @ 150 g a.i./ha recorded the highest reduction of dead hearts over control (48.75, 65.81 and 78.22%) after three sprays with maximum yield (81.21 t/ha). Thus, fipronil 5% SC @ 150 g a.i./ ha may be useful in the control of early shoot borer and root borer in sugarcane.
Efficacy of various insecticidal modules against mango hoppers
Journal of entomological research, 2008
Six modules were tried against mango hoppers and module I, application of endosulfan (0.07%) - ca... more Six modules were tried against mango hoppers and module I, application of endosulfan (0.07%) - carbaryl (0.15%) - endosulfan (0.07%) was found most effective and significantly reduced the hopper population, and also gave high yield.
Metaflumizone: A Novel Insecticide Against Helicoverpa armigera
Indian Journal of Plant Protection, 2012
Evaluation of litchi germplasms based on biochemical parameters alongwith incidence of leaf roller (Platypepla aprobola Meyr) and fruit borer (Conopomorpha cramerella Snellen)
Annals of Plant Protection Sciences, 2005
A trial was conducted to evaluate different germplasms of litchi on the basis of biochemical para... more A trial was conducted to evaluate different germplasms of litchi on the basis of biochemical parameters and also to screen them against leaf roller (Platypepla aprobola) and fruit borer (Conopomorpha cramerella) infestation in three locations of West Bengal. A total of 13 ...
Evaluation and development of some eco-friendly integrated pest management (IPM) modules in bitter gourd to minimize melon fruit fly (Bactrocera cucurbitae Coquillett) infestation under lower Gangetic plain region of West Bengal, India
Journal of entomological research, 2022
International Journal of Current Microbiology and Applied Sciences, Feb 10, 2020
Field efficacy of flubendiamide 480sc against brinjal shoot and fruit borer (Leucinodes orbonalis)
Indian journal of entomology, 2018
The field experiments were conducted at Bidhan Chandra Krishi Viswavidyalaya, Kalyani, West Benga... more The field experiments were conducted at Bidhan Chandra Krishi Viswavidyalaya, Kalyani, West Bengal during 2012 and 2013 to evaluate the field efficacy of flubendiamide 480SC against shoot and fruit borer (Leucinodes orbonalis) of brinjal. Seedlings of variety Muktakeshi were transplanted in plots of 25 m2 area with a spacing of 60 x 45 cm. The experiment was designed in randomized block design (RBD) with four replications, and treatments viz., flubendiamide 480SC at 90 g, 72g and 60 g a.i./ha; thiodicarb 75 SP (750 g a.i./ha); quinalphos 20 EC (200 g a.i./ha); and water as untreated control. The insecticides were applied twice at 7 days interval. Results revealed that all the treatments gave significant reduction in infestation. It was evident that flubendiamide 480 SC @ 72 and 90 g a.i./ha was very effective with only 1.64 and 1.03% shoot, and 9.11 and 4.44% fruit infestation, respectively along with significant increase in yield.
Efficacies and economics of some novel insecticides for management of major lepidopteran pests of tomato
Research on Crops, 2015
Efficacies and economics of some new insecticides were evaluated for the management of major lepi... more Efficacies and economics of some new insecticides were evaluated for the management of major lepidopteran pests of tomato at Bidhan Chandra Krishi Viswavidyalaya, Kalyani, West Bengal during 2012–14. Three novel insecticides viz., pyridalyl 10 EC (56.25, 75, 112.5 and 150 g a. i./ha), indoxacarb 14.5 SC (56.25, 75, 112.5 and 150 g a. i./ha) and chlorfenapyr 10 SC (75, 100, 150 and 200 g a.i./ha) were applied twice with four doses along with two standard checks (chlorpyriphos 20 EC @ 350 g a. i./ha and triazophos 40 EC @ 350 g a. i./ha) and untreated control. Pooled results revealed that pyridalyl and indoxacarb @ 150 g a. i./ha were found to be very effective insecticides against Helicoverpa armigera (3.10 and 2.60% fruit damage) and Spodoptera litura (3.34 and 3.59% fruit damage) with 211.21 and 209.59 q/ha marketable yield, respectively. Results indicated that traditional insecticides such as triazophos and chlorpyriphos were most cost effective insecticides with 10.24 and 9.56 benefit: cost ratio, respectively, whereas pyridalyl and indoxacarb at lower doses showed cost efficiency for management of lepidopteran pests of tomato.
Evaluation of some insecticides on brown plant hopper Nilaparvata lugens (Stal.) and its predators in rice
Environment and Ecology, 2009
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Papers by Arunava Samanta