Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 62 for “"SB Plant culture"”.
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Evaluation of the photoprotective role of quercetin to selected light-adapted and shade-tolerant plant species
Plants respond to different light intensities depending on their genetic make-up, mutation and other environmental conditions. Mikania micrantha, Clidemia hirta, and Tetracera sarmentosa were selected so as to analyse how varying light intensity affects some gas exchange characteristics, pigment …
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The epidemiology and management of fungal- and nonpersistent aphid-borne plant viruses in a Mediterranean type climate
… Languedoc, and to Pea seedborne mosaic virus (PSbMV) in all accessions and varieties of Cicer arietinum and L. culinaris and some of L. sativus and most pasture legumes tested. No sources of extreme resistance to Carrot virus Y (CarVY) was found to carrot germplasm. The first reports of seed …
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Self-incompatibility in Cosmos atrosanauineus: a rare Mexican endemic species of Asteraceae
… by Benedict Roezl and brought to Europe for plant verification. Sir William Jackson Hooker (1785-1865), Director of the Royal Botanic Gardens, Kew initially identified the Roezl specimen as Cosmos diversifolius var. atrosanguineus, but it was classified as the distinct species, Cosmos …
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The demography of Oritrophium peruvianum (LAM.) Cuatr. and the impacts of harvesting on its populations in the Venezuelan Andes
… adult vegetative individuals, with middle-sized plants prevailing and with low densities of large adults, whilst densities of small plants were variable. The population structure changed slightly after one year and annual plant growth was shown to be extremely slow. Flowering started at the …
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Factors influencing the post-harvest quality and consumer preference of sweet potato and other products in sub-Saharan Africa
The first theme covers sweetpotato in the marketing chain from farm to consumer. In East Africa, research explored ways of improving the handling and transport of sweetpotato, shelf life and storage of fresh roots on the farms to increase incomes and food security. Transport and handling were …
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Novel approaches to plant pest risk assessment
… by World Trade Organisation and Food and Agriculture Organisation of the United Nations. Current international practices were discussed and research reviewed on qualitative and quantitative approaches to risk assessment. It was proposed that risk assessment be divided into two steps: Pest risk …
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Smallholder food security in sub-Saharan Africa: the case for diatomaceous earth grain protectants
Researchers decided to explore whether diatomaceous earths (DEs) might meet the grain protection demands of rural households. These inert dusts are non-toxic to mammals but deadly to insects absorbing the wax from the insect’s cuticle which leads to water loss and death. Following laboratory …
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Disease resistance in sucrose polyester coated conference pears inoculated with Penicillium expansum and Monilinia fructigena
The objectives of this research were to examine the effect of the sucrose polyester coating Semperfresh® on the physiology and biochemistry of ‘Conference’ pear tissues; to determine how Semperfresh® affects the rate of tissue invasion by Penicillium expansum and Monilinia fructigena; and to …
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Prevalence of knowledge, attitude and practice on pesticides safety among oil palm pesticide handlers in Johor
… when contact is made with pesticide residue on plants, soil, and dust particles after spraying.The objective of this study is to assess the level of knowledge, attitudes and practices of pesticide usage among oil palm plantation workers in Johor and to identify the relationship between …
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Effect of storage temperature and duration on physico-chemical properties, microbial growth and nutritional composition of papaya and banana fruits
Kultivar pisang (Musa sp.) dan betik (Carica papaya) dituai dan disimpan selama sebulan pada suhu penyimpanan dan jangka masa berbeza. Buah-buahan ini diambil daripada kebun yang terletak di Johor Bahru, Malaysia. Masak dalam tempoh yang tidak diingini, perubahan warna kulit, penurunan berat, …
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Effect of peat solidification on macronutrients in soils associated with palm oil plantation in peat area
Nutrients in the soil either from man-made fertilizers or natural are factors that affect the chemicals in the peat soil stabilization through leaching. The study aims to identify the concentration of elements and nutrients on peat solidification of cement (OPC), fly ash and bottom ash. Lab scale …
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Enhancing biomethane production from anaerobic digestion of Sargassum muticum
Higher methane yields from the anaerobic digestion (AD) of Sargassum muticum could improve the process energy balance and make its use during AD more economical and energetically favourable. Previous research showed that after 28 days of AD, methane yields from S. muticum were low (17% of the …
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Efficacy of indigenous pesticidal plants for tomato and brassica pest management in Malawi
… have considerable knowledge about pesticidal plants and reported Tephrosia vogelii, Vernonia amygdalina, Tithonia diversifolia and Azadirachta indica as particularly important. T. vogelii was the most popular species in Zambia (60.7%) and Malawi (53.4%) while brassicas constituted 34% and 44% …
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An investigation of the drivers of sustainable market development for high-nutrient staple crops – the case of vitamin A-rich sweet potato in Zambézia, Mozambique
Vitamin A deficiency (VAD) is a serious issue for 70 percent of Mozambique’s children aged between six months and five years, particularly those living in rural areas although those in low-income urban households are also at risk. Lack of access to vitamin A-rich foods contributes to the 35 percent …
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Diversity and role of bacterial endosymbionts infecting the cassava whitefly, Bemisia tabaci (Gennadius) in Sub-Saharan Africa
… mosaic virus-Uganda (EACMV-UG)-infected cassava plants var. Ebwanateraka. The fecundity (number of eggs laid) and nymph development was not affected by the presence of endosymbionts or the infection of cassava by the virus. AR- whiteflies, however, produced significantly higher number of adults …
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Integrated management of stalk rot disease (Sclerotinia sclerotiorum) of cauliflower in the eastern hills of Nepal
… yield presumably due to competition with crop plants. Some fungal antagonists of S. sclerotiorum, particularly a Trichoderma harzianum, showed promising activity but further work is necessary to translate the results on detached curds into a practical technique. Source of resistance to S. …
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Maize ear rot and associated mycotoxins in western Kenya
Maize was established as the most important crop and cob rot as the most important crop protection problem in Western Kenya. The mean percentage rotten maize grain resulting from cob rot was 19% based on the PRA survey in Kapsabet and Tongaren Divisions and on-farm evaluation of the Kenyan hybrids …
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Towards the management of Ustilago kamerunensis H Sydow and Sydow, a smut pathogen of napier grass (Pennisetum purpureum Schum.) in Kenya
Infection by headsmut, caused by Usti/ago kamerunensis, is the major cause of biomass reduction in Napier grass (Pennisetum purpureum). In Kenya, this grass is the primary source of fodder for zero grazed livestock, which are an important component of small-holder farm incomes in high potential …
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Integrative approach to discovering species diversity within the Mediterranean group of the Bemisia tabaci complex
… and (iv) bioassays to compare their host-plant ranges and performances on 13 plants. Our mitogenome phylogeny showed close relationships among Q1 and Q2 populations, while ASL was placed outside the Q1/Q2 cluster with 100% bootstrap support. Using the mitogenomes as a reference enabled the …
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