خيارات البحث
النتائج 2031 - 2040 من 2,193
Spreading mechanism, epidemiology and susceptibility test of Black Sigatoka and Sigatoka diseases
1987
Lehmann-Danzinger, H. (Goettingen Univ. (Germany, F.R.). Institut fur Pflanzenpathologie und Pflanzenschutz)
The leaf spot diseases of bananas and plantains, Sigatoka and Black Sigatoka, caused by Mycosphaerella musicola and M. fijiensis var. difformis are distributed worldwide and only in Central America respectively. Epidemiological studies are described in detail including seventy of the pathogens at different sites and correlation with climatic data. Susceptibilities of different banana and plantain genomic groups were found to be nearly identical for both diseases except that Black Sigatoka is more virulent so that both pathogens occupy the same ecological niche. A method developed to test the susceptibility of musa clones to Black Sigatoka using plantlets derived from shoot tip culture is described
اظهر المزيد [+] اقل [-]An overview of major pests of citrus in the Commonwealth Caribbean
1987
Reid, J.C. (Caribbean Agricultural Research and Development Institute, Mona (Jamaica))
Pests of major economic significance, their distribution in the Commonwealth Caribbean, the damage they cause and practices for their control are tabulated. The types of pests discussed are defoliators and foliage sap feeders and those causing damage to fruit, fiddler beetles, fruit flies, scale insects, and fruit piercing moths. The potentially serious pests of quarantine significance are summarised with their worldwide distribution and host plants other than citrus. The Mediterranean fruit fly Ceratitis capitata and the aphid vector of Tristeza, Toxoptera citricidus are significant
اظهر المزيد [+] اقل [-]Commercial implications of poor fruit quality due to poor phytosanitation of bananas with special reference to the Windward Islands
1987
Borton, C.A. (Windward Islands Banana Growers' Association, Castries (St. Lucia). Research and Development Division)
Poor phytosanitation affects banana quality through physical defects, harbouring of pests and diseases. The implications on marketing are briefly discussed
اظهر المزيد [+] اقل [-]Moko disease control: the Grenada experience
1987
Ambrose, E. (Inter-American Institute for Co-operation on Agriculture, Castries (St. Lucia))
A diseased mat eradication programme in which mats are injected with Round up, followed by cygon spray and the area sprayed with Gramoxone has been successful. 216,812 mats were destroyed between 1978 and July 1985. Findings of research funded by the EDF include early detection of infected mats by examination for corm discolouration, possibility of Ricinus comunis, begonia jumbie tomato (Solanum sp.) and Xanthosoma sp. as alternative hosts, a recommended fallow period between injection of mats and re-planting of 9-12 months, optimum weed killer and application rate (Round up at 20 mls 2 % soln) and a buffer zone of more than 8 in. in radius
اظهر المزيد [+] اقل [-]Public service delivery for rural development
2016
Afzal, Madiha | Gajate-Garrido, Gissele | Holtemeyer, Brian | Kosec, Katrina
Commercialising organic agriculture. Does it improve household food security? A case study from south-western Uganda النص الكامل
2007
Aigelsperger, L | Njuki, Jemimah | Hauser, M.
Public service delivery for rural development النص الكامل
2016
Afzal, Madiha | Gajate-Garrido, Gissele | Holtemeyer, Brian | Kosec, Katrina
Sabah, Malaysia: Low-emission rural development (LED-R) at a glance النص الكامل
2018
Bahar, N.H.A.
Indexing for citrus virus diseases in Guyana - a brief review
1987
Muller, G.J. (Caribbean Agricultural Research and Development Institute, Georgetown (Guyana))
The tristeza virus and its vector Toxoptera citricidus are present in Guyana, as well as the susceptible rootstock sour orange. Indexing was carried out between 1964 and 1974 and interest was revived in 1982 but this has yet to be resumed
اظهر المزيد [+] اقل [-]The distribution of Moko disease in Central and South America and its control on plantains and bananas
1987
Lehmann-Danzinger, H. (Geottingen Univ., Goettingen (Germany, F.R.). Institut fur Pflanzenpathologie und Pflanzenschutz)
Second to Black Sigatoka (Mycosphaerella fijiensis), Moko (Pseudomonas solanacearum race 2) is the most threatening disease to plantains and bananas. No resistance has been found on commercial varieties. It is present throughout Central America, as well as in Trinidad, Grenada, Brazil, Surinam, Venezuela, Colombia, Ecuador and Peru and suspected in the Dominican Republic. Its detailed distribution in Mexico, Nicaragua, Costa Rica, Venezuela, Colombia, Ecuador and Peru is described. Symptoms, pathogenesis and survival of race 2, which is pathogenic and divided into SFR, the major disease agent on bluggoe, and A and B are described. Disease control by elimination of diseased plants by glyphosate injections is detailed. Good control was achieved in 70 % of infected farms with a 90 day fallow after injection
اظهر المزيد [+] اقل [-]