Rice pest

Xem 1-20 trên 67 kết quả Rice pest
  • Of the total nine hymenopteran parasitic wasps revealed from rice paddy in Sisophon, Northwest Cambodia, there are six larval braconid parasitoids: Apanteles cypris Nixon, Bracon onukii Watanabe, Dolochogenidea agilis Ashmead, Pentatermus striatus (Szepligeti), Taiwanhormius sp., Tropobracon luteus Cameron (Braconidae); two pupal ichneumonid species: Casinaria colacae Sonan, Xanthopimla flavolineata Cameron (Ichneumonidae), and one egg scelionid parasitoid: Telenomus rowani Gahan (Scelionidae). Additionally, all the species were recorded for the first time for Cambodia’s fauna.

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  • The field experiment was conducted at main experimental station of Narendra Deva University of Agriculture and Technology, Kumarganj Faizabad (U.P.) during the season kharif, 2015 to know the occurrence and abundance of insect-pests of paddy on rice crop was monitored on rice variety Pusa Basmati. This investigation revealed that pest activity commenced from 31th Standard meteorological week (SMW) and continued upto 49th SMW.

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  • Major Rice growing district of Odisha was studied pest diversity. Most of the paddy farmers face huge economic losses in paddy cultivation due to damage by insect pest. This study aims to enlist major rice pests that are present in rice fields of all major rice growing district of Odisha are explained in this detail report.

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  • Rice Stem borer is an important rice pest in India. In the present study, the genetic variability was analyzed among geographically isolated populations of rice yellow stem borer (YSB) from sixty locations of Odisha using ISSR marker technique. Fifty ISSR primers were screened and eleven ISSR primers were selected on the basis of clarity, usability, and reproducibility of their banding patterns. The 11 primers produced a total of 67 bright and discernible bands, all of which were polymorphic.

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  • Recognising the pattern of pest infestation helps greatly to understand the changes in the population dynamics due to several biological, environmental and climatological factors. As data are count in nature, suitable choice of distribution as well as linear or non-linear growth models are obvious to capture the variability present the population. If data are not properly fitted, integrity of scientific inference will be at stake. Hence, in the present study, an attempt has been made to fit appropriate discrete distributions along with the usual linear and non-linear modular approach.

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  • Brown plant hopper (BPH), Nilaparvata lugens Stal is one of the most serious rice pest in India. Growing of resistance varieties is the most effective and environment-friendly strategy for protecting the crop from BPH. In the present study we evaluated the forty entries of plant hopper screening trial against BPH under glass house condition. The trial material was received from All India Coordinated Rice Improvement Programme (AICRIP) DRR, Hyderabad during kharif 2011.

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  • The pest population density is controlled by logistic growth model. The logistic model is applied to find out the carrying capacity, equilibrium level and its solutions. In this model time varies continuously and the population is unstructured. The population members are of homogeneous group. By using the logistic growth model, the Equilibrium levels and maximum supportable population that is carrying capacity and the stability of equilibrium state of the important rice pest stem borers are calculated.

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  • Yellow stem borer has been identified as a major insect pest of deepwater rice, causing severe yield losses. Bt gene(s) from Bacillus thuringiensis have been proven very effective in pest resistance program. The use of transgenic plants expressing Bt gene(s) is now occupied effective approach to control insect infestation. We have successfully introduced a synthetic cryIA(b) gene into embryogenic calli of a deepwater indica rice variety, Vaidehi, by using the biolistic method of transformation.

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  • Developing cultivars resistant against different biotypes of brown planthopper (BPH) through marker-assisted selection (MAS) is an effective management strategy to control this pest. In this study, 28 polymorphic simple sequence repeat (SSR) markers were analyzed in 108 F3 progenies derived from the cross of Rathu Heenati and MR276 rice cultivars to investigate the association with BPH resistance against biotypes 2 and 3.

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  • Rice (Oryza sativa L.) is among the most important food crops that provide a staple food for nearly half of the world’s population. Rice crops are prone to various types of stresses, both biotic and abiotic. Biotic stresses include insect pests, fungus, bacteria, viruses, and herbicide toxicity. Among abiotic stresses, drought, cold, and salinity are also well studied in rice.

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  • In recent years, sea water has intruded into paddy fields along the coastal areas of the Mekong River Delta. This phenomenon, e.g abiotic stress, has caused rice yields to decrease significantly. A set of six new varieties of rice, including a variety control, IR28, were tested in Long An Province, a region subjected to abiotic stress, from August 2013 to December 2013. The experiments were arranged according to randomized complete block design, with three replications.

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  • Survey were conducted to collect storage pests such as red flour beetle, Tribolium castaneum and rice weevil, Sitophilus oryzae from twenty three different government storage warehouses of the Tamil Nadu. Phosphine resistance in T. castaneum ranged from 91.67 to 100 per cent while in S. oryzae ranged from 66.67 to 90 per cent. About 91.67 per cent of maximum phosphine resistance was recorded in Nagarkoil, TNCSC. Considering S. oryzae, highest resistance level (90%) was recorded in Trichy, TNCSC while Pudukkottai, TNCSC showed lowest resistance level (66.67 %).

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  • The present investigation study on Seasonal Incidence of Insect Pest Species of Paddy Collected Through Light Trapat Jabalpur was carried out at the Krishi Nagar experimental farm, Adhartal, JNKVV, Jabalpur, Madhya Pradesh during the period between the last week of June to the last week of December, 2015.Result showed that all 8 species were identified as pests of paddy having regular occurrence in light trap catches i.e.

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  • Integrated Pest Management (IPM) is knowledge intensive requires holistic approach, expert advice timely decision making and action on fast track. Needs of farmer in pest management revolves around pest diagnostics, surveillance, forecasting and dissemination of expert information in short time. Recent improvement form research brought considerable change in the cropping system and allowed farmer to grow several crops throughout the year, which were very seasonal in the past.

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  • The farmers under Upper Krishna command areas are experiencing severe water scarcity, high labour cost and unavailability of labour for agricultural production due to adverse climate change. To overcome this problem, Direct Seeded Rice (DSR) method was introduce under UKP command areas.The average crop yield of paddy under DSR method was 5.85 and 6.20 t.ha-1 andin Transplanting Practices(TP) it was 5.23 and 5.45 t.ha1 during kharif 2018 and 2019 respectively against potential yield of 7.5 t.ha-1 .

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  • A pot culture experiment was undertaken during kharif, 2017 on evaluation of induced mechanism of zinc in rice for expression of tolerance against white backed plant hopper (WBPH) in the Department of Entomology, College of Agriculture, Odisha University of Agriculture and Technology, Bhubaneswar. It was revealed that basal application of Zn EDTA @ 40 kg/ha along with its foliar spray @ 0.8%, twice at 30 and 45 days after transplanting (DAT) (T6) expressed fair degree of tolerance against WBPH.

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  • The estimation of crop yield before harvest helps in different policy making in an order for storage, distribution, marketing, pricing, import-export etc. Crop productions depend on several factors such as weather factors, plant characters and agricultural inputs. The present study was carried out to develop the appropriate statistical model for estimation of rice yield before harvest in the year 2018-19. This research was done on plant biometrical characters along with farmer’s appraisal.

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  • The wheat varieties HD-2733 and K-307 were found moderately resistant against Sitophilus oryzae in which higher hardness, lower moisture, lesser eggs, progeny and population with longer developmental period and lesser grain weight loss and damaged grain were recorded. Rest wheat varieties found susceptible to Sitophilus oryzae. Hardness having negative association with pest infestation. While moisture showed positive relation. The fecundity and progeny were positive relation with percent weight loss and damaged grain.

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  • Brown spot of rice caused by Drechslera oryzae and rice root-knot nematode caused by Meloidogyne graminicola are serious pest of rice and has become a major constraint in rice production throughout the world. A lab experiment was conducted in Laboratory of the Department of Plant Pathology, SHUATS, Prayagraj, and U.P. during 2018-19 to observed the effect of botanicals viz., against Drechslera oryzae and Meloidogyne graminicola of rice.

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  • Cowpea, [Vigna unguiculata (L.) Walp.] also known as blackeye pea, southern pea and lobia is one of the most important food legumes in the semi-arid tropics. With an average of 25% protein (on dry weight basis) in its seeds and tender leaves, cowpea is a major source of protein. In storage, Callosobruchus maculatus F. also called cowpea beetle, cowpea weevil or bruchid, is regarded as the most important and common pest of cowpea both in Africa and Asia. All vigna crops except rice bean are susceptible to bruchids.

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