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Weed management approaches

Xem 1-14 trên 14 kết quả Weed management approaches
  • A field experiment was conducted for two consecutive rainy seasons of 2011 and 2012 at G. B. Pant University of Agriculture and Technology, Pantnagar, U.S. Nagar (Uttarakhand) to evaluate the “Influence of various weed management approaches on weed dynamics in rice under different crop establishment methods”. The results revealed that the lowest density and dry matter of total weeds at 60 days after sowing/days after transplanting was obtained with transplanted rice.

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  • It was examined that weeds cause a lot of problems in the crop field. Weeds compete with the main crop for nutrients, water, food, space, sunlight etc. Weeds utilize the nutrients provided to the main crop and sometimes dominate the main crop. Some weeds are very noxious and they are harmful for both humans as well as animals. It is clearly revealed from studies done in field of weeds that use of herbicides used to control weeds cause many effects on soil as it leads to degradation in the quality of soil, water as well as it pollutes environment.

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  • A field experiment was conducted at Norman E. Borlaug Crop Research Centre, G. B. Pant University of Agriculture and Technology, Pantnagar, U.S. Nagar (Uttarakhand) during kharif seasons of 2011and 2012 to study the effect of crop establishment methods and weed management practices on weed dynamics and productivity of rice. The results revealed that the lowest density and dry matter of total weeds at 60 days after sowing/days after transplanting was obtained with transplanted rice.

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  • The present investigation was carried out to study “ecofriendly weed management through non-chemical approaches in high density planting system of cotton.

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  • Weed is a plant growing where it is not desired so weeds are ubiquitous. The vegetable fields are usually infested by a wide spectrum of broad and grassy weeds. Weeds compete with the crops for water, soil, nutrients, light, space and crop yields are significantly reduced as reported by several studies. The vegetable as well as agricultural crops are infested with a variety of weeds. Out of over 800 weeds documented in India, 80 are considered as serious and nearly 200 as major weeds. They also harbour many insect-pests and microorganisms.

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  • Weeds are the part and partial of crop production since evolution of agriculture. Because of their superiority, efficiently harness favourable microclimate at the cost of crop. They mainly compete for mineral nutrients, soil moisture, space and light interception. In berseem field we can successfully achieve weed control below economic threshold level by adapting both precautionary and curative measures in an integrated manner.

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  • Ginger (Zingiber officinale Roscoe) is grown in tropical and subtropical regions of the world for its spice and medicinal values. The emergence and early growth of ginger is inherently slow and weed growth can impact on yield. It has slow initial growth rate and shallow root system. As a result, it is invaded by a variety of weeds. A field experiment was carried out during 2015-16 and 2016-17 in randomized block design with three replications under AICRP on Weed Management at College of Horticulture and Forestry, CAU, Pasighat, Arunachal Pradesh, India with nine treatments.

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  • Weeds severely affect crop quality and yield. Therefore, successful farming relies on their control by coordinated management approaches. Among these, chemical herbicides are of key importance. Their development and commercialization began in the 1940's and they allowed for a qualitative increase in crop yield and quality when it was most needed. This book blends review chapters with scientific studies, creating an overview of some the current trends in the field of herbicides.

    pdf260p ktct_1669 09-05-2012 103 21   Download

  • A field experiment was conducted during 2005-06 to 2006-07 at Varanasi to find out the effect of three residue management practices viz. R1 (Residue Removal), R2 (Residue Retention alone), R3 (Residue Retention with Trichoderma) and four weed management treatments viz. W1 (Control), W2 (Hand weeding at 30 &45 DAS), W3 (Isoproturon +2,4-D (1.0+0.5 ha-1 at 30 DAS), W4 (Fenoxaprop 120 g a.i. ha-1 fb Metsulfuron 4g a.i. ha-1 ) on weeds and productivity of zero-till wheat (Triticum aestivum L. emend Fiori & Poal) in rice-wheat cropping system during the winter (rabi) season.

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  • Rice production has an important role in Indian economy and transplanting being most common practice adopted in the country. Transplanted rice encounters diverse type of weed flora consisting of grasses, sedges and broad-leafed weeds as well as sedges. Effective control of these weeds at initial stages can ensure in increasing the productivity of this crop. Weed control in transplanted rice by mechanical and cultural methods is quiet expensive. At peak period of crop weed competition due to labour crises weeding gets delayed.

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  • An investigation entitled “Chemical weed control in chilli + onion intercropping system” was carried out at the Vegetable Division in Kittur Rani Channamma College of Horticulture, Arabhavi, University of Horticultural Sciences, Bagalkot (Karnataka) during Kharif season of 2014 and 2015 on well drained red loamy soil to find out the suitable approach (herbicides+cultural practices) for weed management and for improving the productivity of chilli+onion intercropping system.

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  • The ongoing need for new agents to control weeds has stimulated the search for new photosynthetic inhibitors. We described in this chapter a variety of compounds presenting this type of activity. The natural products have been explored toward this end resulting in the identification of compounds with various structural motifs. Such an approach has resulted in the discovery of photosynthetic inhibitors with new modes of action. This, in turn, can be helpful in dealing whit resistance a problem to be faced in weed management....

    pdf572p conquynho32 15-09-2012 44 6   Download

  • The current scenario of agriculture, evolving eco-friendly approach of weed control is more advisable so as to protect the natural resources such as soil flora and fuana including human being and animals in a holistic manner.

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  • Front Line demonstration (FLDs) is a unique approach to provide a direct interface between researcher and farmers as the scientists are directly involved in planning, execution and monitoring of the demonstrations for the technologies developed by them and get direct feedback from the farmers’ field about the crops. The frontline demonstrations on clusterbean were conducted by Krishi Vigyan Kendra, Maulasar, Nagaur-II during 2018 to 2019 in kharif season in village of Dabra in Maulasar bock.

    pdf5p nguaconbaynhay3 07-02-2020 5 0   Download

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