Dr. Pham Van Mach (1)
Prof. Pham Van Ty (2)
Bsc. Nguyen Thi Thu (2)
I. INTRODUCTION
Pinus merkusiiis rather widely planted in some provinces in the North and Centre of our country and is one of the main forest plantation species. However one of the difficulties encountered in the course of planting Pinus merkusii is its frequent susceptibility to damping – off disease in the nursery stage. The proportion of infected seedlings is 10 – 15%. annually; sometimes and in some places this reaches 70 – 80%, causing considerable monetary and labour losses and on many occasions failure in the reforestation programme. For control of this dangerous disease the people have for a long time applied various sowing, physical, mechanical, chemical and technical measures. These measures are effective to some extent but still have severed limitations such as: high cost, difficult application, short – term performance and in particular ecological upset and environmental pollution (if chemical measures are used in excess). To overcome the problems of the above measures the tendency now is to use biological ” struggle for life” measures. Streptomyces strains naturally available in nature (soil, garbage) capable of producing antibiotic substances to inhibit or destroy F. oxysporum with the aim of controlling the damping – off disease of P. merkusii seedlings in our country in a simple, cheap, long – term effective way without impairing the ecological balance and causing environmental pollution. The aim of this research subject is to use.
Latest news
- Project: Study on integrated management of insect pests and diseases on Docynia indica in northern Vietnam
- Project: Study on integrated pest management of major leaf insect pests and stem borer beetles in Acacia hybrid, A. mangium and A. auriculiformis in Vietnam
- Project: Research and develop an integrated management program for control of cinnamon pests in some main cinnamon growing areas (Northern mountainous region and Quang Nam province)
- Project: Pilot plantation and completion of planting techniques of technologically advanced germplasm of Acacia auriculiformis (AA42, AA53, AA56, AA92, AA95) for sawlog in the southeast and south central.
- Project "Research on selection of varieties and intensive afforestation techniques of Prunus arborea (Blume) Kalkman for providing lager timber in the Northeast and Northwest regions, Vietnam"
Oldest news
- Characteristics of soil for Pinus merkusii forest plantation and effect of the latter on forest soil fertility (1980 - 1984)
- Review of existing experience and research on new models of agroforestry for each region (1981 - 1985)
- Propagation of dendrocalamus by air -layering
- Strategy for genetic conservation of forest plant species in Vietnam
- Relationship between the properties of coastal sandy soil and planting potential of Casuarina equisetifolia in Vietnam
