arunava samanta

• phd
• Professor (Associate) at Bidhan Chandra Krishi Viswavidyalaya

Efficacy of emulsifiable concentrates (ECs) derived from botanical plant seed extracts, employing diverse solvents was assessed against Helicoverpa armigera (Hübner). Seed extracts from Pongamia pinnata, Annonasquamosa, Ricinus communis and Pachyrhizus erosus renowned for exhibiting insecticidal properties were employed as active ingredients. Solve...

A major constraint in okra (Abelmoschus esculentus (L.)) production is damage caused by insect pests, whitefly and jassids, which results in low yield. Identification of resistant varieties is a convenient and eco-friendly way towards sustainable management of insect pests attacking okra. Therefore, population dynamics of the two major pests were r...

A major constraint in okra (Abelmoschus esculentus (L.)) production is damage caused by insect pests, whitefly and jassids, which results in low yield. Identification of resistant varieties is a convenient and eco-friendly way towards sustainable management of insect pests attacking okra. Therefore, population dynamics of the two major pests were r...

A major constraint in okra production is damage caused by insect pests, whitefly and jassids, which results in low yield. Identification of resistant varieties is a convenient and eco-friendly way towards sustainable management of insect pests attacking okra. Therefore, population dynamics of the two major pests were recorded in fifteen hybrid vari...

Background The invasive and calamitous polyphagous pest Spodoptera frugiperda or commonly known as fall armyworm (FAW) poses serious menace to the global agricultural production. Owing to the revamped invasion of FAW in 2018 in India, present study was undertaken for precise assessment of its genetic identity and pesticide resistance to aid in pest...

Sericulture is one of the prominent enterprise in India and has expanded by leaps and bounds over the decades. It has assumed new dimension with respect to its different disciplines. As a result of enormous breadth and diversity of the subject, a number of books have been published on various aspects of basic, general and applied sericulture. At pr...

The sweet potato whitefly, Bemisia tabaci (Gennadius), is one of the several species complexes of whitefly that are currently significant agricultural pests. Bemisia tabaci infests more than 600 plant species and thrives under a wide range of temperature conditions. In addition to the direct damage caused by sucking plant sap, it vectors several pl...

Bemisia tabaci (whitefly) is one of the most detrimental agricultural insect pests and vectors of many plant viruses distributed worldwide. Knowledge of the distribution patterns and insecticide resistance of this cryptic species is crucial for its management. In this study, genetic variation of mitochondrial cytochrome oxidase subunit 1 (MtCoI) ge...

Indoxacarb, a promising new generation insecticide, is gaining popularity among vegetable growers in West Bengal, India, for controlling a large number of insects. However, it may simultaneously also increase the risk of contamination in the edible portions of the vegetables. This study was planned to analyze the persistence behavior of indoxacarb...

The whitefly, B.tabaci is a major pest of agricultural crops which transmits begomovirus in a species-specific manner. Yellow vein mosaic disease (YVMD) and okra leaf curl disease (OLCD) caused by distinct begomovirus are a major limitation to production of okra in India. In this framework the present investigation reports, for the first time, comp...

Field investigations were conducted on bitter gourd variety ‘Pusa Do Mausami’ to evaluate the efficacy of six suggestive integrated pest management (IPM) modules against melon fruit fly. Results of the experiments revealed that module M3 [summer ploughing, earthing up, removal and destruction of infested fruits, male annihilation by cue lure bai...

Simple Summary The silverleaf whitefly (B. tabaci) is an important agricultural pest damaging several agricultural and horticultural crops worldwide. Keeping in mind the status of insecticide overuse, the current experiment was designed to evaluate the sensitivity of B. tabaci towards imidacloprid and thiamethoxam (two popularly used neonicotinoids...

Varieties of Litchi in India are described

Candidatus portiera aleyrodidarum is an obligate primary endosymbiont harboured by whitefly including the sweetpotato whitefly, Bemisia tabaci (Gennadius). An experiment was performed by using 16SrDNA universal primers for characterization of C. portiera present within the whitefly population infesting Bhendi. Finally, a phylogenetic tree was const...

The present investigation was conducted in kharif 2017 at BCKV Teaching Farm, Mandouri, Nadia, West Bengal, to evaluate the efficacy insecticide, viz., Carbofuran 3% CG at different doze rates, Fipronil 0.3% GR, Carbosulfan 25% EC and Cartap Hydrochloride 4% GR against yellow stem borer, Scirpophaga incertulas and Rice leaf folder, Cnaphalocrosis m...

The present investigation was conducted in summer 2018 at BCKVTeaching Farm, Mandouri, Nadia, West Bengal, to evaluate the efficacyinsecticide, viz., Spinotetram 0.8% GR at different doze rates againstyellow stem borer, Scirpophaga incertulas and Rice leaf folder,Cnaphalocrosis medinalis infesting rice. The pooled data on efficacy ofdifferent treat...

The present investigation was conducted in kharif 2017 at BCKV Teaching Farm, Mandouri, Nadia, West Bengal, to evaluate the efficacy insecticide, viz., Carbofuran 3% CG at different doze rates, Fipronil 0.3% GR, Carbosulfan 25% EC and Cartap Hydrochloride 4% GR against yellow stem borer, Scirpophaga incertulas and Rice leaf folder, Cnaphalocrosis m...

Candidatus portiera aleyrodidarum is an obligate primary endosymbiont harboured by whitefly including the sweetpotato whitefly, Bemisia tabaci (Gennadius). An experiment was performed by using 16SrDNA universal primers for characterization of C. portiera present within the whitefly population infesting Bhendi. Finally, a phylogenetic tree was const...

Bitter gourd (Momordica charantia L.) also known as bitter melon being rich in folate and vitamin C is one of the most popular cucurbitaceous vegetables grown extensively in the tropics and subtropics especially in India. Besides its numerous culinary preparations, it has immense medicinal properties as well as ornamental uses. The fast growing vin...

A field experiment was conducted over two seasons to evaluate the dissipation kinetics and assess the risks of chlorfenapyr in tomato and cabbage following foliar application of chlorfenapyr 10% SC at 100 and 200 g a.i. ha⁻¹. Samples of tomato, cabbage, and soil were analyzed and quantified by gas chromatography-electron capture detector (GC-ECD)....

An experiment was conducted in cabbage ecosystem of West Bengal in 2013-2014 and 2014-2015 to study the population fluctuation of diamond back moth (DBM) with abiotic factors along with efficacy of eight novel insecticides and bio-pesticides on DBM and subsequent effect on natural enemies. Results revealed that, DBM population had a positive correl...

Performance of a ready-mix insecticide, Alika 247 ZC (thiamethoxam 12.6 per cent + lambda-cyhalothrin 9.5 per cent) is reported at three different doses against major pests of tea, viz. thrips, tea mosquito bug and semilooper, during the months of September-October of 2012 and 2013 at two different agro-climatic tea growing regions i.e. Terai and D...

Aim: Insect pest infestation is the major limiting factors for commercial cultivation of cabbage. Diamondback moth (DBM) is the most notorious insect pest responsible foryield loss ofcabbage in most of the cases. The objective ofthe present study was to evaluate some new insecticides having different novel mode ofaction against this pest. Methodolo...

Field investigations were conducted on brinjal to evaluate the efficacy of ready mix formulation, spirotetramat 120 + imidacloprid 120-240 SC against sucking pest complex during 2012 and 2013. The results revealed that spirotetramat 120 + imidacloprid 120-240 SC @ 75 + 75 g a.i./ha was found more effective than other treatments in the reduction of...

Field evaluation was conducted to study the efficacy of Flubendiamide 480 SC against brinjal shoot and fruit borer (Leucinodes orbonalis Guen.) during two consecutive seasons of 2014. On the basis of percent shoot and fruit infestations, Flubendiamide 480 SC @ 60-90 g a.i./ha was found most effective treatments (1.28-3.48% shoot and 2.15-3.08% frui...

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 an...

A field experiment was conducted to evaluate the bioefficacy and economics of certain insecticides against mustard aphid, Lipaphis erysimi (Kalt.) infestation on mustard during rabi season of 2014-15. Among the treatments, imidacloprid 17.8 SL @ 20 g a.i. ha-1, thiamethoxam 25 WG @ 25 g a.i. ha-1 and diafenthiuron 50 WP @ 50 g a.i. ha-1 were proved...

Aim: Insecticides that are widely used to suppress various pests also disrupt the effectiveness of various natural control agents. After application of insecticides, predators and parasitoids may acquire insecticides via host, direct contact or by ingesting floral nectar and pollen. The main objective of the study was to find out the adverse effect...

The present investigation was carried out to study the seasonal incidence of whitefly in Chilli and its correlation with different weather parameters alongside, fifteen genotypes were subjected for screening against Chilli Leaf Curl Virus. The incidence of whitefly was started from the 45 th standard week of (observations-2.07 adults/three leaves)...

The field experiment was carried out in the pre-kharif season of 2013 at Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal, India to evaluate the efficacy of different bio-pesticides against sucking pests of okra. The experiment was laid out in randomized complete block design with three replications for each treatment. The treatmen...

The experiments were conducted at Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal, India during rabi seasons of 2011–12 to 2013–14 for management of major lepidopteran pests of cabbage. The treatments 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 ga. i./ha), chlorfenapyr...

Field experiments were conducted to study the bio-efficacy of mixture formulation of thiamethoxam 12.6% + lambda cyhalothrin 9.5% 247 ZC at three different doses (22, 27.5 and 33 g a.i./ha), beta-Cyfluthrin 9% + imidacloprid 21% 300 OD at three different doses (75, 100 and 125 g a.i./ha) and some individual insecticides viz., thiamethoxam 25 WG @ 2...

Field experiments were conducted to study the bio-efficacy of mixture formulation of thiamethoxam 12.6% + lambda cyhalothrin 9.5% 247 ZC at three different doses (22, 27.5 and 33 g a.i./ha), beta-Cyfluthrin 9% + imidacloprid 21% 300 OD at three different doses (75, 100 and 125 g a.i./ha) and some individual insecticides viz., thiamethoxam 25 WG @ 2...

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 chl...

The traditional knowledge has strong scientific basis and sometimes practiced as mythological instances. Indigenous technical knowledge (ITK) is the knowledge that people in a given community has developed over time and continued to improve. It is based on experience, often tested over long period of use, dynamic and changing, and lays emphasis on...

The experiments were undertaken to find out the impact of real-time N management following LCC technique on pest infestation in rice by participatory research during 2006-07 to 2008-09. Six randomly selected villages were taken in Ranaghat Block-1 of Nadia district. Ten interested farmers were identified from each village for the comparative study...

A field trial was conducted during kharif season, 2011 at Bidhan Chandra Krishi Viswavidyalaya, (BCKV) Mohanpur, Nadia, West Bengal, India to study the effect of some insecticides and their mix formulations against pigeon pea pod borer and pod fly. The experiment was laid out in randomized block design (RBD) with three replications for each treatme...

Field evaluation of new diamide and other insecticides against Leucinodes orbonalis Guen in brinjal revealed that flubendiamide 30 g a.i. ha-1 was superior over other treatments recording the lowest shoot (2.65%) and fruit (14.07%) infestation followed by chlorantraniliprole 27.25 g a.i. ha-1 (2.77% shoot, 15.33% fruit infestation),flubendiamide 20...

The field experiments were conducted for evaluation of Dinotefuran, a third generation neonicotinoid insecticide, against brown planthopper (BPH) in farmer’s field at Sahebganj village (Block-Bhatar, Dist.–Burdwan), West Bengal, India during kharif, 2008-09 and 2009-10. Seven treatments contained four doses of dinotefuran at 15, 20, 25 and 30 g ai....

The studies revealed that spiromesifen 240 SC @ 150 g a.i./ha significantly reduced the red spider mite infestation and was second best in reducing whitefly population. The highest yield was recorded in spiromesifen 240 SC @ 150 g a.i./ha. Further, spiromesifen showed excellent residual activity over three weeks whereas standards failed to provide...

Sulfoxaflor is the first product from the new class of insecticides, will be introduced in India shortly. Sulfoxaflor acts via the insect nicotinic receptor in a complex manner. Southern parts of West Bengal are well known for the production of rice in India. Infestation of brown planthopper (BPH) is being aggravated gradually with the expanse of a...

Field experiment was conducted at Horticultural Research Farm, Mondouri, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, West Bengal during 2007-08 and 2008-09 to evaluate the effectiveness of different spray treatments viz., T 1 : Spraying of imidacloprid (0.005%) at panicle emergence, T 2 : T1+Spraying of endosulfan (0.07%) at 21 days after spray...

This is a report of an experimental study on a nanoencapsulation of the organophosphate acephate. Acephate was encapsulated in polyethylene glycol, using a simple, easy-to-replicate method that required no special equipment or conditions. The nanoencapsulation (nanoacephate) was characterized and its bioefficacy as compared to the regular commercia...

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...

Field investigations were conducted on brinjal to evaluate the efficacy of ready mix formulation, spirotetramat 120 + imidacloprid 120-240 SC against sucking pest complex during 2012 and 2013. The results revealed that spirotetramat 120 + imidacloprid 120-240 SC @ 75 + 75 g a.i./ha was found more effective than other treatments in the reduction of...

The experiment was conducted at Horticultural Research Farm, Mondouri, B.C.K.V., West Bengal, during 2005·2006 to evaluate the effectiveness of different spray modules viz. Module 1 : imidacloprid 17.85 SL (0.008%)-azadirachtin 1500 ppm (0.4%)-endosulfan 35 EC (0.07%), Module 11 : thiamethoxam 25 WG (0.008%)-azadirachtin 1500 ppm (0.4%)-endosulfan...

An investigation was carried out to study the effect of plant growth regulators (PGRs) on fruit quality and leaf mineral composition of litchi (Litchi chinensis Sonn.) cv. 'Bombai'. The treatments consisted of four sprays (applied between September and December at monthly intervals) of three PGRs:-naphthaleneacetic acid (NAA), gibberellic acid (GA...

Itchi is one of the most important subtropical fruits and in India it is cultivated in plains and foothills of Northern India stretching from Tripura in east to Himachal Pradesh in west. In India, Bihar is the leading state in litchi production and four districts viz., Muzaffarpur, Samastipur, Darbhanga and Motihari (Champaran) contribute about 45...

Field trial was conducted at Namkhana, Sundarban, 24 Parganas (South), West Bengal during pre-kharif 2003-2004 to evaluate the bio-efficacy of fenpropathrin 30 EC at three different concentration levels (0.5%, 0.1% and 0.15%) along with other chemicals viz. fenazaquin 10EC (0.1 %), dicofol18.5 EC (0.25%) and ethion 50 EC (0.1 %) against yellow mite...

The crop protection products namely insecticides used on crops leaves residues of the original material or its metabolites in the product and thus enter into animal and human bodies. In spite of a phenomenal increase in the use of pesticides, annually one-third of food production in India is lost due to crop pests. Some of the pesticides-induced pr...

Five insecticides viz. acetamiprid, clothianidin, thiamethoxam, fipronil and oxydemeton-methyl were evaluated against the pest. The highest overall mean diminution of thrips population and consequential yield increase over control were recorded in thiamethoxam (90.1 & 54.3%) followed by acetamiprid (89.8 & 53.2%), fipronil (88.8 & 50.0%), clothiani...

Laboratory experiment was carried out to determine the relative toxicity of different insecticides against two indigenous parasites viz. Trichogramma chilonis Ishii and Bracon hebetor Say based on median Lethal concentration (LC~. On the basis of LC," values, the order of relative safety of those insecticides to Trichogramma chilonis Ishii were alp...

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...

Five percent concentration of five extracts (in water) viz. neem, nishinda, pudina, ipomea and merigold w~ taken for experiment to find out their effectiveness as grain protectant against Sitophilus oryzae Un. ~ the temperature and relative humidity were 28 C and 70% respectively. Among the plant extracts the percentage of maximum grain damage was...

Abstrac:t The mealy bug Planococcus kraunhiae (Kuwana) was successfully reared on sprouted potato tubers. Three successive generations were studied from January to April, 2005. The effect of temperature was evident in the development of both sexes. During January-February duration of first, second, third and fourth instar male was 9-18, 14-21, 19-2...

New ideas in the development of the intelligent nanomaterials miniaturized at the nanometer sizes gained substantial interest because of the wide range of their technological purposes. The recognition of the ultimate limits of computation has also lead computer scientists to seek inspiration from nanobiology. Because living organisms function with...

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...

Three chitin inhibitors, namely, flufenoxuron, diflubenzuron and teflubenzuron each @ 0.01 % and 0.02 % a.i. were tested against indigenous parasitoid Trichogramma chilonis Ishii (Hymenoptera: Trichogrammatidae) to study the adverse effect upon emergence, female percentage and longevity of F1, progeny. The results indicate that the adult female of...

A laboratory study was undertaken to evaluate the effect of different emulsifiers viz., Hyoxyd - X - 200. Hyoxyd - N, Triton - X - 100, Quat - CTAB and Sodium Lauryl Ether Sulphate for increasing the toxicity of deltamethrin, cypermethrin and fluvalinate to the pupal stage of Trichogramma chilonis Ishii (Trichogrammatidae: Hymenoptera). The results...

Laboratory test was conducted to evaluate the relative efficacy of five emulsifiers viz., Hyoxyd-X-200, Hyoxyd-N, Triton-X-100, Sodium Lauryl Ether Sulphate, Quat-CTAB for enhancing the toxicity of cypermethrin, alphacypermethrin, fluvalinate and methomyl to the adults of rice weevil, Sitophilus oryzae Linn. Hyoxyd X-200 was found to be a good emul...

Dissipation of residues of monocrotophos was studied in/on chilli fruits under field conditions during summer & winter. The insecticide (Monocil 36 SL) was applied 20 DAT as foliar spray @ 500 (0.05%) and 1000 (0.1%) g a.i. ha -1. In all, four sprays were given at 15 days interval. At either dose, the cumulative residues of the insecticide in/on ch...