213 research outputs found
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Eco-friendly organic management of rust red flour beetle, Tribolium castaneum (Herbst) under stored conditions
No full textThe results showed that neem leaf powder was the most effective treatment with a record of the highest mean adult mortality of 67.22 per cent and also exhibited the lowest weight loss of 0.67 per cent after 60 days of treatment. It was followed by powders of Eucalyptus (58.89% & 0.87%) and Tulsi (51.11% & 0.80%). The least effectiveness of turmeric rhizome powder against the pest recording minimum adult mortality and maximum weight loss of 30.56% and 1.07% per cent respectively was noticed control against adult mortality (30.56 %), grain weight loss and adult emergence owing to T. castaneum. As a result, 1.5 g/100 g of grains of neem leaf powder can be recommended as a safe control method against T. castaneum in stored wheat. The overall mean adult mortality of T. castaneum in fenvalerate was 72.78 per cent. When it came to treating T. castneum with some inert materials, boric acid treatment was the most effective showed the 100 percent adult mortality, followed by coal ash (71.67 %) and cow dung ash (63.33 %) after 5 days of storage. There was minimum grain weight loss and least adult emergence was recorded in the treatment of coal ash and cow dung ash. Whereas sawdust resulted in the least effective treatment with mean adult mortality of (35.56 %), there was maximum adult emergence seen
Population dynamics of major sucking insect pests on chilli (Capsicum annum L.)
No full textStudies on population dynamics of major sucking insect pests revealed that the incidence of thrips, Scirtothrips dorsalis (Hood), whitefly, Bemisia tabaci (Gennadius) and leafhopper, Amrasca bigutulla bigutulla (Ishida) along with ladybird beetle, Coccinella septemtheirpunctata observed to appear on the chilli crop soon after transplanting. Incidence of thrips commenced in 19th Standard Meteorological Week (SMW) and attained its peak on 25th SMW (18.83 thrips /3 leaves /plant) while an infestation of whitefly was initiated in 20th SMW then it increased gradually and reached its peak on 25th SMW (21.20 whitefly/3 leaves /plant). The peak population of leafhoppers was recorded in 26th SMW (10.4 leafhopper /3 leaves /plant). In case of ladybird beetle, the population ranged from 0.20 to 0.93 per plant and was on the entire crop growth period (18th-37th SMW). Thrips and whitefly exhibited a highly significant positive correlation with maximum temperature, a negative non-significant correlation with evening relative humidity, and a non-significant correlation with wind speed, sunshine hours, and pan evaporation while a negative non-significant correlation with rainfall. Leafhopper population showed highly significant positive correlation with minimum temperature, non-significant negative correlation with maximum temperature, non-significant positive correlation with morning and evening relative humidity, sunshine hours, and rainfall while the negative non-significant correlation with wind speed and pan evaporation. Whereas, the ladybird beetle exhibited a positive non-significant correlation with maximum temperature, wind speed, sunshine hours and a negative non-significant correlation with minimum temperature, morning and evening relative humidity, pan evaporation, and rainfall
Microplastics: Devastation and destination in aquatic ecosystem
No full textPlastic pollution is a major global issue due to its non-biodegradability and persistence in nature. Plastics take thousands of years to degrade and can be converted into microplastics which are very harmful to all living biota due to their extensively small size (≤ 0.5 mm). Even though microplastics are not completely separated during wastewater treatment in plants (WWTPs). MPs are converted from highly stable and different kinds of polymers like polystyrene, polyethylene, etc., and radically distributed across the globe including the Arctic and Polar regions which fascinate scientists and researchers in addressing the issue. Due to the microscopic dimension of plastics, MPs has been entering through various pathways into the food webs of various aquatic fauna and indirectly or directly affecting the ecosystem including human health. Therefore, MPs are an inevitable and emerging threat especially for the aquatic ecosystems. This review discusses briefly the types, sources, chemical properties, and effects of MPs on aquatic biota
Identification of early maturing and leaf determinate growth habit type accessions of cluster bean (Cyamopsis tetragonoloba L. Taub.)
No full textCluster bean (Cyamopsis tetragonoloba L. Taub.), commonly known as guar, is a member of the family Papilionaceae, cultivated in the Indian Sub-continent since time immemorial. It is a drought-hardy leguminous annual crop used variously for vegetables, forage and green manure. There is tremendous variability available in Indian cluster bean germplasm. Genetic resources with their enormous variability for different characters provide the base for the improvement of crop plants. Within genetic resources, genetic stocks are expected to play a major role in future crop improvement programmes. One promising unbranched, single-stemmed and flower determinate growth habit bearing accession IC-140784P1, developed through single plant selection at ICAR-NBPGR Regional Station Jodhpur starts flowering at 23 days after sowing and flowers 50% at 32 days after sowing. This accession does mature only 82 days after sowing. These accessions mature about 10-15 days early compared to normal existing improved cultivars, which take 90-95 days for maturity. Another accession IC 569315 has been characterized as leaf determinate (in which the stem terminates into the leaf) with alternate cluster-bearing habit. The majority of the cluster bean crop is grown under rainfed conditions in the drier parts of the country. Therefore, maturity is an important trait, especially for cluster bean
Effect of GA3 and NAA on yield and benefit: cost ratio of strawberry (Fragaria x ananassa Duch.) cv. Chandler under the open condition of Manipur
No full textThe present experiment was conducted at the experimental field of the College of Agriculture, Central Agricultural University, Imphal, Manipur during the session 2021-22. It was Entitled as the effect of GA3 and NAA on yield and benefit: cost ratio of strawberry (Fragaria x ananassa Duch.) cv. Chandler under open conditions of Manipur. The experiments plot was laid out in Randomized Block Design with three replication and nine treatments with the combination of GA3 and NAA viz., T1 (Control), T2 (GA3 25 ppm), T3 (GA3 50 ppm), T4 (GA3 75 ppm), T5 (GA3 100 ppm), T6 (NAA 25 ppm), T7 (NAA 50 ppm), T8 (NAA 75 ppm) and T9 (NAA 100 ppm), the treatment GA3 @ 75 ppm was found maximum concerning several fruits, fruit length, fruit diameter, fruit volume, specific gravity, harvesting duration, yield and B: C ratio as compared with other treatments and the minimum was recorded in control. Hence, it is concluded that treatment T4 (GA3 75 ppm) positively impacts yield and benefit: cost ratio of strawberry cv. Chandler under open conditions of Manipur
Response of seed endophytic bacteria for the management of chickpea wilt, Fusarium oxysporum f. sp. ciceris
No full textVascular wilts are devastating plant diseases that can affect both annual crops as well as woody perennials, hence inducing major food losses and damaging valuable natural ecosystems. Because of ecological and economic reasons, the management of vascular wilt diseases by conventional chemical methods is raising concerns. More environmentally friendly alternatives such as the use of microbial antagonist to control phytopathogens are now of growing interest. The fact that bacterial endophytes are able to colonize an ecological niche similar to that of vascular wilt pathogens favours them as potential biocontrol agents against wilt diseases. Several possible disease suppression mechanisms of beneficial bacteria were proposed, among them induction of systemic resistance, growth promotion and competition. In this view, we studied out the seed endophytic bacteria (SEB) for the management of chickpea wilt Caused by Fusarium oxysporum f. sp. ciceris. Among the treatment of seed entophytic bacterial isolate in SEB-5 was found highest germination percent (92% in JG 11), minimum mortality percent at pre and post–emergence (7.69 and 9.53% in JG 11 and JG 16, respectively). The minimum total mortality percent 17.82 % was found in JG 11 of SEB-5. The other seed entophytic bacterial isolate were found statistically at par with SEB-5. The minimum germination percent (78.5% in JG 62) as well as highest total mortality percent approximate 58% in JG 11 was found in T6 (treated control). Similarly, all the treatments of seed entophytic bacterial had higher root length and shoot length as compared to T6. Among the treatments the SEB-5 was found significantly highest by 23 cm in root length and 48 cm in shoot length as well as highest vigour index (6613) over the T6 in JG 11 variety. Among the varieties grown the JG 11 was perfumed better and found resistant and JG 62 was found susceptible to wilt. The treatment of seed endophytic bacterial isolate SEB-5, SEB-3, SEB-2, SEB-1 and SEB-4 was identified against wilt pathogen in reduce disease incidence, plant mortality and severity as well as promoting plant growth and health
Identification and characterization of CAT1 gene during drought stress in moth bean [Vigna aconitifolia (Jacq.) Marechal]
No full textMoth bean [Vigna aconitifolia (Jacq.) Marechal] is a drought hardy orphan pulse crop. However, the information related to the identification and characterization of drought stress tolerance genes is very limited. Therefore, the present investigation was formulated to identified and characterized drought tolerant gene(s) from moth bean. Five genes were selected from available expression studies of moth bean and their expression pattern was assessed during time course experiment of drought stress in moth bean. During the time course experiment of drought stress in moth bean, the catalase1 (CAT1) gene was exponentially expressed in up-regulated manner. Thus, CAT1 gene of moth bean was identified as potential candidate gene and validated through Sanger’s sequencing. The genomic sequence CAT1 gene was named as VacoCAT1 and was further characterized using various bioinformatics tools. The VacoCAT1 showed an ORF with incomplete length of 213 bp which encoded 71 amino acids. The coding sequence of VacoCAT1 gene was shown a single exon due to incomplete nature of genomic sequences. The multiple sequence alignment of VacoCAT1 revealed the highly conserved region at 3’ site of the gene as compared to CAT1 gene of other crop species including legumes. The phylogenetic analysis of VacoCAT1 and CAT1 gene of other crop species including legumes revealed three clusters. The cluster VacoCAT1 gene showed close proximity with V. radiata CAT1 in cluster one of phylogenetic tree. The identified and characterized VacoCAT1 gene can be utilized as a genomic resource for enhance drought tolerance in susceptible pulses as well as other crops
Growth attributes and wood properties of lesser-grown agroforestry tree species in the semi-arid zone for quality pulp and paper production
No full textGrowth traits, wood properties, fibre dimensions and fibre derived indices of five lesser-grown agroforestry tree species viz., Ailanthus excelsa, Eucalyptus tereticornis, Leucaena leucocephala, Melia dubia and Neolamarckia cadamba were studied to evaluate the suitability of these species for pulp and paper production in the semi-arid zone of Bundelkhand, India. The result showed that there was a significant variation for all the studied traits. The range of all the studied growth and wood traits among five pulpwood trees were recorded for tree height (5.2-5.9 m), GBH (20-24 cm), volume (0.017-0.027 m3), biomass (8.50-15.28 kg), wood basic density (509.6-584.4 kg/m3), fibre length (819.8-1416.0 μm), fibre diameter (14.6-37.9 μm), fibre lumen diameter (7.5-29.8 μm), fibre double cell wall thickness (4.8-9.7 μm), Runkel ratio (0.23-0.94), Rigidity coefficient (0.19-0.49), Flexibility coefficient (51.54-81.44), Slenderness ratio (31.68-62.74) and Luce’s shape factor (0.20-0.58). Kadamb performed better, however all five species were found to be suitable for making good quality pulp and paper on the basis of wood properties and fibre derived indices grown in such hot and dry conditions. Tree height and GBH traits were positively influenced on the wood physical and anatomical properties, therefore these traits can be used as indirect selection for further improvement of the species which shown high potentiality for promising pulpwood tree species under agroforestry. Further, tree improvement research work required to test the suitable harvesting period for high pulp yield and better paper quality to fulfil the fastest growing demand of pulpwood for paper industries in India
Momordica balsamina L.: An unexploited vegetable crop rich in medicinal and nutritional properties
No full textAfrican pumpkin (Momordica balsamina L.) is a tendrilled, wild-type vine plant with a wide range of therapeutic and nutritional properties that has been used as a conventional medicament in many countries. Alkaloids, resins, glycosides, flavonoids, saponins, cardiac glycoside, steroids and terpenes are found in the plant's fruits, seeds, leaves and bark, and they have varied medicinal properties viz., anti-bacterial, anti-diarrheal, anti-plasmodial, anti-septic, anti-inflammatory, anti-microbial, antioxidant, hypoglycemic, analgesic, and hepatoprotective activities. 'Momordin,' a therapeutic agent, can stop HIV and other viruses from multiplying. The leaves are also a good source of nutrients because they contain 17 amino acids and minerals like potassium, magnesium, phosphorus, calcium, sodium, zinc, manganese, and iron. It also aids in the fight against soil micronutrient deficiencies and high protein and fat content with low fibre content. High potassium content is an excellent source for controlling hypertension and other cardiovascular disorders. This plant may be a protein supplement for poor rural people's cereal-based diets. The medicinal and nutritional value of this wild herb for health care management is discussed in this review
Diversity, abundance and foraging behaviour of pollinators in early sown rapeseed-mustard genotypes
No full textA study was carried out on the diversity, abundance and foraging behaviour of pollinators in early sown rapeseed-mustard genotypes through observing a total of 17 insect species visited flowers of early sown genotypes viz., 9 Hymenopterans, 3 Dipterans, 4 Lepidopterans, and 1 Coleopteran. The abundance (bees/m2/5 min) of A. florea was highest (8.5) followed by A. mellifera (3.9), A. dorsata (3.6) and A. cerana (3.1). The abundance of bee species was maximum (5.6 bees/m2/5 min) in genotypes TH 68 and SANGAM. A. cerana foraged a maximum number of flowers per minute (18.20) followed by A. dorsata (17.57), A. mellifera (17.32) and A. florea (6.45). The foraging rate (flowers/min) of all bee species was maximum (14.98 and 14.90) in genotypes TH 68 and SANGAM. Time spent per flower (sec) was maximum (5.3) by A. florea followed by A. dorsata (1.7), A. mellifera (1.6) and A. cerana indica (1.3). The maximum time spent per flower by all bee species (2.6) was in genotype PDZ 9. Nectar or pollen gatherers were maximum in A. dorsata (37.8% and 25.6%, respectively), while both nectar and pollen gatherers were maximum in A. cerana (45.3%). Nectar foraging, pollen foraging and both nectar and pollen foraging were maximum at peak flowering (36.0%), peak flowering (23.8%) and flowering cessation (42.9%), respectively. Out of the total foragers, top workers were maximum in A. dorsata (97.8%), while side workers were maximum in A. florea (41.0%)