Encyclopedia of Subsistence Farming Solutions (Sakpedia, 2018 Edition)
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Managing Potassium for Organic Crop Production by Robert Mikkelsen an Adequate K Supply Is Essential for Both Organic and Conventional Crop Production
NORTH AMERICA Managing Potassium for Organic Crop Production By Robert Mikkelsen An adequate K supply is essential for both organic and conventional crop production. Potas- sium is involved in many plant physiological reactions, including osmoregulation, protein synthesis, enzyme activation, and photosynthate translocation. The K balance on many farms is negative, where more K is removed in harvested crops than is returned again to the soil. An overview of commonly used K fertilizers for organic production is provided. otassium is an essential nutrient for plant growth, but it often receives less attention than N and P in many crop Pproduction systems. Many regions of the U.S.A. and all of the Canadian provinces remove more K during harvest than is returned to the soil in fertilizer and manure (Figure 1). In the U.S.A., an average of only 3 units of K is replaced as fertilizer and manure for every 4 units of K removed in crops, resulting in a depletion of nutrients from the soil and increasing occur- rences of deficiency in many places. Potassium is the soil cation required in the largest amount by plants, regardless of nutrient management philosophy. 1,400 Removal 1,200 Hay and forage crops can remove hundreds of pounds of K from the soil Manure each year, placing a heavy demand on soil resources. 1,000 Fertilizer Large amounts of K are required to maintain plant health 800 and vigor. Some specific roles of K in the plant include os- moregulation, internal cation/anion balance, enzyme activa- 600 tion, proper water relations, photosynthate translocation, and 400 protein synthesis. -
Hellula Undalis (Lepidoptera: Pyralidae)—A Possible Control Agent?
Biological Control 26 (2003) 202–208 www.elsevier.com/locate/ybcon First detection of a microsporidium in the crucifer pest Hellula undalis (Lepidoptera: Pyralidae)—a possible control agent? Inga Mewis,a,d,* Regina G. Kleespies,b Christian Ulrichs,c,d and Wilfried H. Schnitzlerd a Pesticide Research Laboratory, Department of Entomology, Pennsylvania State University, University Park, PA 16802, USA b Federal Biological Research Centre for Agriculture and Forestry, Institute for Biological Control, Heinrichstr. 243, 64287 Darmstadt, Germany c USDA-ARS, Beneficial Insect Introduction Research, 501 South Chapel Str., Newark, DE 19713, USA d Technical University Munich, Institute of Vegetable Science, D€urnast II, 85350 Freising, Germany Received 18 April 2002; accepted 11 September 2002 Abstract For the first time, a microsporidian infection was observed in the pest species Hellula undalis (Lepidoptera: Pyralidae) in crucifer fields in Nueva–Ecija, Philippines. Because H. undalis is difficult to control by chemical insecticides and microbiological control techniques have not been established, we investigated the biology, the pathogenicity and transmission of this pathogen found in H. undalis. An average of 16% of larvae obtained from crucifer fields in Nueva–Ecija displayed microsporidian infections and 75% of infected H. undalis died during larval development. Histopathological studies revealed that the infection is initiated in the midgut and then spreads to all organs. The microsporidium has two different sporulation sequences: a disporoblastic development pro- ducing binucleate free mature spores and an octosporoblastic development forming eight uninucleate spores. These two discrete life cycles imply its taxonomic assignment to the genus Vairimorpha. The size of the binucleate, diplokaryotic spores as measured on Giemsa-stained smears was 3:56 Æ 0:29lm in length and 2:18 Æ 0:21lm in width, whereas the uninucleate octospores measured 2:44 Æ 0:20 Â 1:64 Æ 0:14lm. -
Responses of the Blister Beetle Hycleus Apicicornis to Visual Stimuli
Physiological Entomology (2011) 36, 220–229 DOI: 10.1111/j.1365-3032.2011.00787.x Responses of the blister beetle Hycleus apicicornis to visual stimuli LEFULESELE N. LEBESA1,2,3, ZEYAUR R. KHAN1,AHMED HASSANALI1,4, JOHN A. PICKETT5, TOBY J. A. BRUCE5, MATTHEW SKELLERN5 and K E R S T I N K R UGER¨ 2 1International Centre of Insect Physiology and Ecology, ICIPE, Nairobi, Kenya, 2Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa, 3Department of Agricultural Research, Maseru, Lesotho, 4Department of Chemistry, Kenyatta University, Nairobi, Kenya and 5Department of Biological Chemistry, Rothamsted Research, Harpenden, Hertfordshire, U.K. Abstract. Insect attraction to host plants may be partly mediated by visual stimuli. In the present study, the responses of adult Hycleus apicicornis (Guer.)´ (Coleoptera: Meloidae) to plant models of different colours, different combinations of two colours, or three hues of blue of different shapes are compared. Single-colour models comprised the colours sky blue, bright green, yellow, red, white and black. Sky blue (reflecting light in the 440–500 nm region) is the most attractive, followed by white, which reflects light over a broader range (400–700 nm). On landing on sky blue targets, beetles exhibit feeding behaviour immediately. When different hues of blue (of different shapes) are compared, sky blue is preferred over turquoise, followed by dark blue, indicating that H. apicicornis is more attracted to lighter hues of blue than to darker ones. No significant differences are found between the three shapes (circle, square and triangle) tested, suggesting that reflectance associated with colour could be a more important visual cue than shape for host location by H. -
Revision of Hycleus Solonicus (Pallas, 1782) (Coleoptera: Meloidae, Mylabrini), with Larval Description and DNA Barcoding
© Entomologica Fennica. 30 November 2017 Revision of Hycleus solonicus (Pallas, 1782) (Coleoptera: Meloidae, Mylabrini), with larval description and DNA barcoding Zhao Pan, Qian-Qian Bai, Jue Wang & Guo-Dong Ren Pan, Z., Bai Q.-Q., Wang, J. & Ren, G.-D. 2017: Revision of Hycleus solonicus (Pallas, 1782) (Coleoptera: Meloidae, Mylabrini), with larval description and DNA barcoding. — Entomol. Fennica 28: 219–232. Hycleus solonicus (Pallas, 1782), referred to H. polymorphus species group, is revised. Adults are redescribed and illustrated, eggs and first-instar larvae are de- scribed and illustrated for the first time, COI sequence for DNA barcoding is re- ported for the first time, the geographical distribution is revised and all available faunistic records from the literature and collections are summarized. In addition, two incorrect determinations are pointed out and Zonabris solonica var. dianae Sahlberg, 1913 is proposed to be a synonym of Hycleus scabiosae (Olivier, 1811). Z. Pan, The Key Laboratory of Zoological Systematics and Application, College of Life Sciences, Hebei University, Baoding, Hebei 071002, P.R. China; E-mail: [email protected] Q.-Q. Bai, The Key Laboratory of Zoological Systematics and Application, Col- lege of Life Sciences, Hebei University, Baoding, Hebei 071002, P. R. China J. Wang, College of Life Sciences, Hebei University, Baoding, Hebei 071002, P. R. China G.-D. Ren, The Key Laboratory of Zoological Systematics and Application, Col- lege of Life Sciences, Hebei University, Baoding, Hebei 071002, P. R. China; E- mail: [email protected]. Received 30 August 2016, accepted 22 December 2016 1. Introduction vised. In the literature it has been confused with the genus Mylabris Fabricius, 1775 and other Hycleus Latreille, 1817, belonging to the tribe Mylabrini genera by several authors. -
Urban Expansion and Sensitive Environments
Urban Expansion and Sensitive Environments Assessing the role of agri-industries as landscape buffers to the neighbouring Greater Blue Mountains World Heritage Area RIRDC Publication No. 09/025 RIRDCInnovation for rural Australia Urban Expansion and Sensitive Environments Assessing the role of agri-industries as landscape buffers to the neighbouring Greater Blue Mountains World Heritage Area by J Merson, R Attwater, S Booth, R Mulley, P Ampt, H Wildman, M Nugent, S Hooper, M Campbell and R Chapple March 2009 RIRDC Publication No 09/025 RIRDC Project No UNS-18A © 2009 Rural Industries Research and Development Corporation. All rights reserved. ISBN 1 74151 829 6 ISSN 1440-6845 Urban Expansion and Sensitive Environments – Assessing the role of agri-industries as landscape buffers to the neighbouring Greater Blue Mountains World Heritage Area Publication No. 09/025 Project No. UNS-18A The information contained in this publication is intended for general use to assist public knowledge and discussion and to help improve the development of sustainable regions. You must not rely on any information contained in this publication without taking specialist advice relevant to your particular circumstances. While reasonable care has been taken in preparing this publication to ensure that information is true and correct, the Commonwealth of Australia gives no assurance as to the accuracy of any information in this publication. The Commonwealth of Australia, the Rural Industries Research and Development Corporation (RIRDC), the authors or contributors expressly disclaim, to the maximum extent permitted by law, all responsibility and liability to any person, arising directly or indirectly from any act or omission, or for any consequences of any such act or omission, made in reliance on the contents of this publication, whether or not caused by any negligence on the part of the Commonwealth of Australia, RIRDC, the authors or contributors. -
Nutrient Management for Blueberries in Oregon J
Archival copy. For current information, see the OSU Extension Catalog: https://catalog.extension.oregonstate.edu/em8918 NUTRIENT MANAGEMENT EM 8918 November 2006 $5.00 Nutrient Management for Blueberries in Oregon J. Hart, B. Strik, L. White, and W. Yang Archival copy. For current information, see the OSU Extension Catalog: https://catalog.extension.oregonstate.edu/em8918 Contents Growing condition assumptions .........................................................................................1 Tissue testing .......................................................................................................................2 Interpreting tissue test results ..............................................................................................3 Soil sampling ......................................................................................................................4 Site preparation ...................................................................................................................4 Nitrogen ..............................................................................................................................6 Phosphorus ..........................................................................................................................9 Potassium ............................................................................................................................9 pH and manganese ..............................................................................................................9 -
Cytogenetic Analysis, Heterochromatin
insects Article Cytogenetic Analysis, Heterochromatin Characterization and Location of the rDNA Genes of Hycleus scutellatus (Coleoptera, Meloidae); A Species with an Unexpected High Number of rDNA Clusters Laura Ruiz-Torres, Pablo Mora , Areli Ruiz-Mena, Jesús Vela , Francisco J. Mancebo , Eugenia E. Montiel, Teresa Palomeque and Pedro Lorite * Department of Experimental Biology, Genetics Area, University of Jaén, 23071 Jaén, Spain; [email protected] (L.R.-T.); [email protected] (P.M.); [email protected] (A.R.-M.); [email protected] (J.V.); [email protected] (F.J.M.); [email protected] (E.E.M.); [email protected] (T.P.) * Correspondence: [email protected] Simple Summary: The family Meloidae contains approximately 3000 species, commonly known as blister beetles for their ability to secrete a substance called cantharidin, which causes irritation and blistering in contact with animal or human skin. In recent years there have been numerous studies focused on the anticancer action of cantharidin and its derivatives. Despite the recent interest in blister beetles, cytogenetic and molecular studies in this group are scarce and most of them use only classical chromosome staining techniques. The main aim of our study was to provide new information in Citation: Ruiz-Torres, L.; Mora, P.; Meloidae. In this study, cytogenetic and molecular analyses were applied for the first time in the Ruiz-Mena, A.; Vela, J.; Mancebo, F.J.; family Meloidae. We applied fluorescence staining with DAPI and the position of ribosomal DNA in Montiel, E.E.; Palomeque, T.; Lorite, P. Hycleus scutellatus was mapped by FISH. Hycleus is one of the most species-rich genera of Meloidae Cytogenetic Analysis, but no cytogenetic data have yet been published for this particular genus. -
STRIVE Report Series No.74
STRIVE Report Series No.74 Spent Mushroom Compost Management and Options for Use STRIVE Environmental Protection Agency Programme 2007-2013 Comhshaol, Pobal agus Rialtas Áitiúil Environment, Community and Local Government EPA Inside Pages NEW_Blue Text 08/09/2011 11:09 Page 1 Environmental Protection Agency The Environmental Protection Agency (EPA) is REGULATING IRELAND’S GREENHOUSE GAS EMISSIONS a statutory body responsible for protecting n Quantifying Ireland’s emissions of greenhouse gases the environment in Ireland. We regulate and in the context of our Kyoto commitments. police activities that might otherwise cause n Implementing the Emissions Trading Directive, pollution. We ensure there is solid involving over 100 companies who are major information on environmental trends so that generators of carbon dioxide in Ireland. necessary actions are taken. Our priorities are protecting the Irish environment and ENVIRONMENTAL RESEARCH AND DEVELOPMENT ensuring that development is sustainable. n Co-ordinating research on environmental issues (including air and water quality, climate change, The EPA is an independent public body biodiversity, environmental technologies). established in July 1993 under the Environmental Protection Agency Act, 1992. STRATEGIC ENVIRONMENTAL ASSESSMENT Its sponsor in Government is the Department n Assessing the impact of plans and programmes on of the Environment, Community and Local the Irish environment (such as waste management Government. and development plans). ENVIRONMENTAL PLANNING, EDUCATION AND OUR RESPONSIBILITIES GUIDANCE n Providing guidance to the public and to industry on LICENSING various environmental topics (including licence We license the following to ensure that their emissions applications, waste prevention and environmental do not endanger human health or harm the environment: regulations). -
Identification of Insects, Spiders and Mites in Vegetable Crops: Workshop Manual Loopers Chrysodeixis Spp
Important pests in vegetable crops This section gives descriptions of common pests found in Australian vegetable crops. They are listed according to the insect order they belong to. Moths and butterflies (Lepidoptera) Heliothis (corn earworm, tomato budworm, native budworm) Helicoverpa spp. Heliothis larvae feed as leaf eaters and bud and fruit borers on a wide range of plants, including many weeds. Adults lay round, domed, ribbed eggs that are cream when newly laid, turning brownish (‘brown ring’ stage) as they mature. Larvae grow up to 40 mm long and vary in colour from green through yellow and brown to almost black, with a pale stripe down each side. The moths have a wing span of 35–45 mm. Heliothis moth at rest These are some examples of heliothis damage to vegetable crops: • On lettuce and brassicas, larvae feed on the outer leaves or tunnel into the heart of the plant. • In tomato crops, eggs are laid on the leaves, flowers and fruit. Young larvae burrow into flowers causing them to fall and they cause pinhole damage to very young tomato fruit. Older larvae burrow into the fruit, creating holes and encouraging rots to develop. • In capsicum, larvae feed on the fruit and the seed inside the fruit. Eggs are laid mainly on leaves, but also on flowers and buds. Heliothis eggs on tomato shoot • In sweet corn, eggs are laid on the silks and leaves. Larvae feed on the developing grains on the cob, sometimes on the leaves and often inside the tip of the corn cob. • In green beans and peas, the larvae feed on the flowers, pods and developing seed inside the pods. -
Crucifer Insect Pest Problems: Trends, Issues and Management Strategies
Crucifer insect pest problems: trends, issues and management strategies G.S. Lim1, A. Sivapragasam2 and W.H. Loke2 1IIBC Station Malaysia, P.O. Box 210, 43409 UPM Serdang 2Strategic, Environment and Natural Resources Center, MARDI, P.O. Box 12301, 50774, Kuala Lumpur Abstract Crucifer vegetables are important cultivated crops and are widely grown in many parts of the world, including the highlands in most tropical countries. They are frequently attacked by a number of important insect pests. Some have been a problem for a long time while others have become important only recently. For many, trends are apparent pertaining to their changing status, including other aspects and strategies associated with efforts to counter them. In some cases, they are also closely associated with other agricultural developments and agronomic practices which are driven by commercial interests in vegetable production. Among the major trends recognised are: (1) A number of pests persisting to be important (e.g., Plutella xylostella or diamondback moth (DBM), Pieris rapae, Hellula undalis), (2) Negative impacts of pesticides continuing to be of major concern where DBM remains a serious problem, (3) Some pests becoming more important, either independently of DBM suppression (e.g., leafminer and Spodoptera exigua) or as a consequence of effective DBM control (e.g., aphid and Crocidolomia binotalis), (4) DBM becoming increasingly resistant to Bacillus thuringiensis, and (5) New cultivation practices emerging, such as rain shelter and hydroponic systems. All these have generated new concerns, additional issues and challenges, and have demanded a review of crucifer cultivation and the associated pest problems, including their management practices and approach. -
Desmodium Intortum Scientific Name Desmodium Intortum (Mill.) Urb
Tropical Forages Desmodium intortum Scientific name Desmodium intortum (Mill.) Urb. Synonyms Early flowering stage (cv. Greenleaf) Trailing, scrambling perennial herb or subshrub; image with Megathyrsus Basionym: Hedysarum intortum Mill.; Desmodium maximus cv. Petrie, S Qld, Australia hjalmarsonii (Schindl.) Standl.; Meibomia hjalmarsonii Schindl. Family/tribe Family: Fabaceae (alt. Leguminosae) subfamily: Faboideae tribe: Desmodieae subtribe: Desmodiinae. Morphological description Leaflets usually ovate-acute, Inflorescence a terminal or axillary with dark spots on the upper surface raceme Trailing, scrambling perennial herb or subshrub with (cv. Greenleaf) strong taproot. Stems 1.5 - 4.0 mm diameter, longitudinally grooved, often reddish-brown, sometimes ± glabrescent, mostly with dense, hooked or recurved hairs, glandular, sticky to the touch; ascendant, non- twining, rooting at the nodes if in prolonged contact with moist soil, to several metres long. Leaves pinnately trifoliolate; stipules 2 - 6 mm long, usually recurved, often persistent; petiole 3 - 5(- 9) cm long, pubescent; terminal leaflet usually ovate sometimes broadly elliptic, 5 Immature pods - 13 cm long, 2 - 7 cm wide, petiolule 6 - 12 mm long; Pods up to 12-articulate; articles semicircular or rhombic breaking up at lateral leaflets 3-10 cm long, 1.5 - 6 cm wide, petiolule 2 - maturity 4 mm; all laminae covered with ascending hairs on both surfaces; base rounded to truncate, apex acute, often with sparse reddish-brown/purplish marks on the upper surface. Racemes terminal or axillary, to 30 cm long; rachis with dense appressed to spreading hooked hairs, 2-flowered at each node; pedicel filiform, 6-10 mm; calyx 2.5-3 mm, 5-lobed, lowest lobe longest; corolla pink, purplish red to violet becoming bluish or greenish white, 9-11 mm. -
Production of Liquid Biofertizer and Biochemical Characterisation of Component Nitrogen-Fixing and Phosphate-Solubilising Bacteria Species
PRODUCTION OF LIQUID BIOFERTIZER AND BIOCHEMICAL CHARACTERISATION OF COMPONENT NITROGEN-FIXING AND PHOSPHATE-SOLUBILISING BACTERIA SPECIES BY UZOR, EKENEDILICHUKWU FREDRICK U14/NAS/BTG/023 SUPERVISOR: DR. C.O. ONYIA A PROJECT REPORT SUBMITTED TO THE DEPARTMENT OF BIOTECHNOLOGY AND APPLIED BIOLOGY, FACULTY OF NATURAL AND APPLIED SCIENCES, GODFREY OKOYE UNIVERSITY, UGWUOMU-NIKE, ENUGU IN PARTIAL FULFILMENT FOR THE AWARD OF A BACHELOR OF SCIENCE (B.Sc.) DEGREE IN BIOTECHNOLOGY JULY 2018 i APPROVAL This project has been presented to and approved by Godfrey Okoye University, Enugu in partial fulfilment of the requirement for the award of Bachelor of Science (B.Sc.), and degree in Biotechnology from the Department of Biotechnology and Applied Biology. …………………….. ……………….. Uzor, Ekenedilichukwu Fredrick Date Student …………………… ……………… Dr. C.O. Onyia Date Project Supervisor ……………………… ………………. Dr. C.O. Onyia Date Head of Department ii DEDICATION …for my family. iii ACKNOWLEDGEMENTS All glory be to God Almighty; Whose grace has been ever sufficient, always. My deepest gratitude goes to my family; my parents - Mr. & Mrs. P. K. O. Uzor, my siblings – Sister Ada, Sister Chi, Oluomachukwu,; thank you for your abundant love, sincere care and unflinching support. To Chidera Ejike, for your deepest care, support and love. Thank you. I wish to appreciate my quintessential supervisor, who is also the Head of my department, Dr. C. O. Onyia; for her pain-staking and diligent efforts in ensuring the success of this work, and for her excellent work in the department. My profound gratitude also goes to the Vice-Chancellor, Prof. Christian Anieke, for ensuring a conducive environment for academic activities; the Dean, Faculty of Natural and Applied Sciences, Prof.