Research Papers/Topics in Crop Science

PATHOGENICITY OF Meloidogyne incognita AND Fusarium oxysporum f. sp. lycopersici ON GROWTH, YIELD AND WILT SEVERITY IN TWO VARIETIES OF TOMATO (Solanum lycopersicum L.) IN GHANA

ABSTRACT The pathogenicity of fungus, Fusarium oxysporum f. sp. lycopersici and nematode, Meloidogyne incognita on growth, yield and wilt severity was studied on two tomato varieties, Mongal F1 and Petomech in a randomized complete block design, factorial experiment with three replications on the University of Ghana and National service farms from July 2018 to June 2019. Each plot had an area of 10 m2 with 25 plants. Fusarium inoculum of 1.3×106 cells per 5 mL was inoculated on fie...

Seasonal Abundance Of Amaranth Lepidopteran Defoliators And The Role Of Indigenous Parasitoids And Phenylacetaldehyde In Their Control In Nairobi County, Kenya

ABSTRACT Amaranth is one of the African indigenous vegetables that is gaining popularity due to its nutritional, medicinal and economic values. Its potential as a source of food security in East Africa and most parts of the world has heightened demands for the once neglected crop. In Kenya and Tanzania, the Lepidopteran defoliators are important pests of the crop which can cause up to 100% yield loss. Little information on the population dynamics of these pests make their management di...

Developing Maize (Zea Mays L.) For Fresh Maize Production In Southeastern Nigeria

ABSTRACT Green (fresh) maize (Zea mays L.) provides food security and income to farmers especially when other crops are still in the field. However, research on green maize variety is scarcely reported in literature or information on suitable genetic material (germplasm) for green maize production. Developing maize for fresh maize production in the southeastern Nigeria was carried out in the Center for Agricultural Research, School of Agriculture and Agricultural Technology, Federal Uni...

Inheritance Of Resistance To Striga Hermonthica (Del.) Benth. In An Open Pollinated Maize Population, Tzl Composite-1 Cl.

ABSTRACT The parasitic weed Striga hermonthica (Del.) Benth. of the Scrophulariaceae family constitutes one of the most economically important biological constraints in maize production in the sub-Saharan regions of Africa. The type of gene action involved in the inheritance of resistance to Striga hermonthica was investigated using the open-pollinated population, TZLComposite-1 Cl in a North Carolina design 1 scheme. Recombination were done among the best families and also the poorest...

To Evaluate The Lethal Effect Of Hexane Extracts Of The Leaves Of Rehan (Ocimum Basilicum) And Lupine Seeds (Lupinus Termis) Against The 3rd Larval Instars Of Spiny Bollworm (Earias Insulana

AbstractThis study was carried out in the laboratory of Entomology, Plant Protection Department , College of Agricultural Studies , Sudan University of Science and Technology (SUST) to evaluate the lethal effect of hexane extracts of the leaves of Rehan (Ocimum basilicum) and Lupine seeds (Lupinus termis) against the 3rd larval instars of spiny bollworm (Earias insulana Boisduval, 1833). Also further experiments were conducted to investigate the efficacy of sesame oil as a synergist. Four con...

Planting Time, Spray Regime, Disease Expression And Their Impacts On Six Cucumber Lines In A Derived Savanna Agroecology Of Nsukka, Southeastern Nigeria.

Cucumber (Cucumis sativus L.) belongs to the Cucurbitaceae family. It is a major vegetable crop worldwide and develops rapidly, with a shorter time from planting to harvest than most crops. It is a monoecious annual climber or creeper that has been cultivated for over 3,000 years and is still widely cultivated today. The fruit is soft, succulent with high water content, roughly cylindrical and elongated with tapered ends. The plant shades one another, being allowed to creep on the groun...

Partial Nutrient Balance In Cassava (Manihot Esculenta Crantz) And Soybean (Glycine Max (L) Merril) Intercrop For Sustainable Agriculture In A Derived Savannah Location

ABSTRACTThree field experiments to investigate the partial nutrient balance (N and K) incassava/soybean intercrop system were conducted at University of Nigeria, Nsukka in aderived Savannah location of South Eastern Nigeria. Effect of fertilizer rate, residual fertilizerand soybean residue management on growth and yield of soybean and cassava and soil nutrientreserve were studied. Soybean growth and yield were significantly affected by their varieties,fertilizer rate and cropping sys...

Evaluation Of Cassava Cultivars And Intercropping With Legumes As An Integrated Nematode Pest Control Strategy In Cassava (Manihot Esculenta Crantz) Production

ABSTRACTThese studies on evaluation of cassava cultivars and intercropping with legumes as anintegrated nematode control strategy in cassava production were carried out as15greenhouse/microplot and field experiments. Of the 200 cultivars screened for resistanceto Meloidogyne spp., only 76 survived and from this lot only 3 lines 77/227, TMS30572and 73/222, showed any resistance while 7 others namely NR8082, 75.668, 73/238(Egbenegbe), 73/295, 73/118, 75740(Panya), 82/00661 and 73295B were ...

Evaluation Of 31 Rice (Oryza Sativa L.) Breeding Lines And Genetic Analysis Of Eight Selected Lines Using Diallel Methods

ABSTRACT A diallel set consisting of p 2 combinations (p parents ½ P(p-1) F2 hybrids, and the backcrosses among eight rice breeding lines were grown in replicated trails. The eight rice breeding lines were selected from an initial thirty one rice breeding lines comprising eighteen medium maturing rice lines and thirteen early maturing rice lines on the basis of their maturity (early to medium ), plant height (semi – dwarf to intermediate ), tillerring ability (low to high) and spi...

Fluvial Facies, Vertebrate Taphonomy And Palaeosols Of The Teekloof Formation (Permian) Near Beaufort West, Cape Province, South Africa

ABSTRACTThe main Karoo Basin of South Africa contains a relatively continuous sequenceof continental deposits that accumulated over a 100 million year period fromPermo-Carboniferous (280 Ma) to early Jurassic (180 Ma). In the southwesternregion of the basin the Karoo succession is approximately 4 000 m thick, theupper half of which consists of vertebrate fossil-bearing fluvial rocks of theBeaufort Group.This study deals with Lower Beaufort (Adelaide Subgroup) strata belonging tothe Teek...

Optimising techniques for improving post-harvest quality of orange (citrus sinensis (l.) Osbeck) and mango (mangifera indica, l.) Fruits in eastern zone of tanzania

EXTENDED ABSTRACT The preliminary experiment was done by using Jaffa orange variety to assess the effects of different concentrations of hexanal, calcium chloride and smoke treatment on physicochemical quality. Jaffa orange fruits were separately (i) dipped in hexanal at 0.01%, 0.02% and 0.04% volume/voume for five minutes (ii) dipped in calcium chloride 1%, 2% and 4% weight/volume for five minutes (iii) fruits were smoked by burning 0.5 kg, 1.0 kg and 1.5 kg of dry banana leaves (iv...

Effectiveness Of Reduced Rates Of N On Productivity And Economic Returns Of Sorghum In Striga Infested Semi-Arid Areas Of Tanzania

ABSTRACT Performances of three sorghum (Sorghum bicolor L. Moench) genotypes (Wahi, Hakika and Pato) and inorganic soil amendments were studied under naturally Striga asiatica [L.] Kuntze infestation for one cropping season (2015/16) in two locations, using a split plot design laid out in a randomized complete block design with four replications. A susceptible sorghum (Pato cultivar) was used as a bioassay to evaluate the effectiveness of reduced rates of N under Striga infestation. At ...

Identification of quantitative trait loci for salinity tolerance in rice (oryza sativa l.) Using ir29/hasawi mapping population

ABSTRACT Thirty days old rice seedlings of 300 F5:6 recombinant inbred lines (RILs) derived from a cross between a salt sensitive, IR29 (indica), and a salt tolerant, Hasawi (indica), were evaluated for salinity tolerance and thereafter QTLs linked to salinity tolerance were identified. Large variation in salinity tolerance among the RILs was detected. Final salinity injury scores ranged from highly tolerant to highly sensitive with a transgressive segregation towards sensitive parent. ...

Effectiveness Of Cultural Practices And Sweet Potato Varieties (Ipomoea Batatas Lam) In Managing Sweet Potato Weevil (Cylas Spp) In Zanzibar

ABSTRACT Field experiments were conducted simultaneously from April to July 2012 at agroecologies; Bambi (Latitude 06o 09’S, Longitude 039o 16’E; and Altitude 20m above sea level) Central District and Kizimbani (Latitude 05o 54’S, Longitude 039o 16’E; and Altitude 20 m above sea level) Western Unguja district. The aim was to investigate the effectiveness of selected cultural practices (weeding and hilling-up once, twice and thrice), vine portions (apical, middle and basal) an...

Screening of farmer preferred tomato lines (solanum lycopersicon l.) For resistance against begomoviruses along the coastal belt of tanzania

EXTENDED ABSTRACT A study was done to enhance the understanding of the diversity of begomoviruses and to identify tomato varieties resistant to Tomato yellow leaf curl disease (TYLCD) that can be used by farmers in the coastal belt of Tanzania. Twenty four out of 225 diseased leaf samples collected tested positive for DNA-A component for primer pairs VD360/CD1266 and VD360/AC1048. No DNA-B or satellites were detected. Their phylogenetic tree constructed with other closely related sequen...


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