Bamboo produces new culms from buds on subterranean rhizomes during the monsoon, generally from early June until late August.
Expansion of culms continues until October. Blight significantly affects culms in August, the disease being at its worst by mid-November.
Subsequently, there is little or no increase in the number of blighted culms.

Diagnostic symptoms of the blight are described. Coniothyrium fuckelii Sace. and Acrenwnium strictum W. Gams were the two most commonly isolated fungi from blighted bamboos.

Artificial inoculation tests have established that A. strictum (Herb. I. M. I. 278366) is pathogenic on new branches which developed from ground layered culm cuttings of Bambusa balcooa Roxb. at the Forest Research Institute campus, and on naturally grown culm of B. vulgaris Scrad at Nowapara, Chittagong. The pathogenic ability of the fungus is discussed.

Copper salts, borax and boric acid individually provide good to excellent protection to wood against fungal and insect attack. A new formulation has been developed at the Forest Research Institute, Chittagong, Bangladesh with borax, boric acid and copper sulphate (BBC) in mixture. Immediate precipitation of copper borate occurs when borax is added to a clear solution of copper sulphate and boric acid in mixture. The precipitate dissolves in ammonium hydroxide and an intense blue solution is obtained. On vaporization of ammonia from the solution copper borate is reprecipitated.

This refers to “Phytophysiological studies forests of Chakaria Biggyan Patrika The relationship distribution of ground water seem to the article on mangrove Sundarbans” (Bano 1 & 2 : 17-28). shown between mangrove species table ( Fig. 1 ) does be tenable. Mangrove species grow under tidal swamp conditions. During the high tides water table in tidal swamps occurs over the soil surface. The fall of groundwater table during the low tides under such conditions depends mainly on soil permeability than on elevation of the landform. Soil permeability in Chakaria Sundarbans being very slow, the groundwater table remains almost on the soil surface even during the low tides. No scope, therefore, remains to be confused on the issue at which depth the groundwater table should occur in very poorly drained soils of tidal swamps.

Some species of bamboos produce flowers once in their life and die after flowering. The seeding cycle is said to be 6 to 120 years. Some other species produce flowers annually throughout the year and do not die after flowering. In order to keep record on the nature of flowering of bamboos, Government of India issued a circular in 1893 which has Gupta, M. L. S. 1952. Gregarious flowering of Dendrocalamus strictus. Ind. For. 78 : 547-550 Gupta, K. K. 1972, Flowering of different species of bamboos in Cachhar district of Assam in recent times. Ind. For. 98 : 83-85 Scngupta, M. L. 1939. Early flowering in Dendrocalamus strictus. Ind. For. 65 : 583-585 been incorporated in Bangladesh and other Forest Manuals ( Hasan 1973 ). For Bangladesh, there is no regular report of the flowering of bamboos. Hasan (1973) reported and analysed the flowering of 5 species of Bangladesh bamboos which flowered till 1973. Banik (1979) reported the flowering of “Baijjya Bansh” (Bambusa vulgaris Schradex Wendl).

Dendrocalamus Strictus Nees-was introduced to Hazarikhil during the year 1939 (Hasan 1978). Eight offsets of this species were collected from that area and planted in the Forest Research Institute campus (FRI), Chittagong in 1974. Later on, during 1981-1982, five clumps were also
raised in Keochia Research Station through offsets collected from the same mother clump of Hazarikhil.

A study of anatomical structures of leaf surface, culm surface and internodal structure of Melocalamus compactiflorus (Kurz) Benth was made. The taxonomic value ofthe anatomical characters of the species has been discussed. Leaf surface anatomy agrees well with that studied by
Metcalf (1960). On the basis of vascular bundle type, Melocalamus can be placed in the group BD of the proposed system of Grosser and Liese (1973). Comparative studies with allied genera suggest that Melocalamus is related to Melocanna and Dinochloa as proposed by S. Dransfield (1981 ).

Twenty timber species were investigated for the determination of steam bending properties. Presteamed solid wood could satisfactorily be bent by using a suitable hand bending device. A 30 minutes’ steaming period was found adequate to bend 1.27 cm thick wood to a reasonable degree. Sharp bends could conveniently be made in wood of very hard nature at 60 minutes’ steaming. The timber species under investigation were classified into three categories based on their bending properties

Preliminary investigations were carried out for the determination of clay mineralogy of the Sundarban soils. A total of 50 pedons were examined over a north-west to south-east transect running through the Sundarbans. Finally, four pedons were selected for laboratory investigation.
Based on the observations made from the field investigations, as well as from the results of the physicochemical analyses, it appeared that pedologically the soils were very young and possessed no diagnostic horizon.
The dominant minerals in the clay fraction are weathered mica and smectite with traces of kaolinite, chlorite and interstratified minerals. The clay minerals were identified mainly by the X-ray diffraction technique supported by other techniques. It was observed that, so far as the clay mineralogical composition was concerned,the Sundarban soils had a homogeneity both in vertical and in horizontal directions. Slight variation in the clay mineralogical composition and content occurring among the pedons are the inherited properties of the soil materials.

Teak (Tectona grandis) pressure treated with an oil-borne preservative was investigated to find its usefulness as transmission poles. The pole size round Teak was found to contain an average of 45 percent sapwood which is readily perishable by wood destroying organisms. Teak poles were treated by the Bethel full-cell process using varying pressure and duration to evaluate their effect on the penetration and retention ofthe preservative mixture of 40 : 60 creosotelight diesel oil. With the increase of both treating pressure and time the increase in penetration was not found to be statistically significant. The retention, however, significantly increased with the increase of pressure but the increase of time could not produce any significant effect.

A penetration of 1.57 cm with retention of 174.64 kg/m³ of treated sapwood could be obtained by using 8.81 kg/cm² pressure for 3 hours. This penetration is considered adequate to protect the sapwood region of the pole.

Bangladesh is blessed with 119 species of mammals (Khan 1982). The abundance of such a large number of species in a small territory has been possible because of a diversified flora, a characteristic of tropical forests. However, the existing mammalian population indicates a distinctly
deteriorating trend during the past several decades. No systematic survey of mammals has ever been carried out for the area now under the territories of Bangladesh. It is, therefore, difficult to quantify the magnitude of loss. Our knowledge is limited to some old records made by Blanford (1888) and Pocock 1939, 1941) and some recent works (Choudhury 1969, Mountfort 1969, Husain 1974, Khan 1982). None of these records is complete and uptodate and, therefore, further studies are needed in this direction. A reconnaissance survey was made during 1978 and 1979 to assess the status and distribution of some mammals of Bangladesh. This paper discussess the status and distribution of 21species covering 8 families.