Initial determining mechanism of resistancein Pinus merkusii Jungh. and Vriese to Dendrolimus punctatus Walker

Dao Ngoc Quang, Le Van Binh Forest Science Institute of Vietnam  Dendrolimus punctatus Walker is the most damaging pest to Pinus merkusii Jungh. &Vriese in terms of both level of attack per individual tree and percentage of trees attacked in a location. It causes not only serious losses in yield as well as wood and resin quality, but also effects the ecological environment. However, about three hectares of 30 year old P. merkusii plantation in Son Loc commune, Can Loc … [Read more...]

Applying tablet-shaped mixed biofertilizer (MF1) to pine and Eucalypts in the nusery

Pham Quang Thu, Tran Thanh Trang Nguyen Hoai Thu, Nguyen Manh Ha, Dang Nhu Quynh Forest Science Institute of Vietnam  With the aim of producing high-quality seedlings of eucalypt and pine species biofertilizer, including soil live-in microorganisms, has been produced and applied to seedlings in the nursery. In forest production phosphate fertilizer is usually applied to soil in order to improve the productivity of trees. However, after a while the soluble phosphate … [Read more...]

Ectomycorrhizal inoculation of Anisoptera thurifera (Blanco) Blume and Shorea guiso (Blanco) Blume with ectomycorrhizal fungi in Philippine red soil

Ectomycorrhizal inoculation of Anisoptera thurifera (Blanco) Blume and Shorea guiso (Blanco) Blume with ectomycorrhizal fungi in Philippine red soil NS Aggangan1, JS Aggangan2, JCO Bulan2 and CAS, Limos2 1National Institute of Molecular Biology and Biotechnology, University of the Philippines Los Baños, College, Laguna 4031, Philippines: Email nea@laguna.net; 2Former Students, Philippine Science High School, Diliman, Quezon City, Philippines Abstract Rooted cuttings of … [Read more...]

VARIATION IN GROWTH AND DISEASE RESISTANCE OF EUCALYPTUS SPECIES AND PROVENANCES TESTED IN VIETNAM.

INTRODUCTION The genus Eucalyptus L’Herit of the family Myrtaceae includes about 500 Eucalyptus species having natural distribution mainly in Australia (Eldridge et al., 1993). Only Eucalyptus deglupta Blume occurs naturally in the Philippines, Indonesia and Papua New Guinea (PNG) and the species E. urophylla occurs on seven islands of Indonesia namely Adonara, Alor, Flores, Lembata, Pentar, Timor and Wetar. Eucalypts are very important plantation tree species and by the year 2000 … [Read more...]

Research on possible use of a number of Streptomyces strains for the control of Damping – off disease of Pinus merkusii caused by Fusarium oxysporum

  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 … [Read more...]