What is Paper?
Paper is a common and familiar material used in our day
to day work. The precariat production and consumption of paper
in a country reflect the extent of development of tha.t country.
• 1 f •
Paper is so much co-related to us that we cannot dream of happy
and worthy life without it. Our knowledge remains self-centered
if we fail to have some idea about this important pillar of
civilization.

Introduction
Eucalyptus is a large genus of family wyrtaceae which
comprises over 500 species, varieties and hybrids. Most of the
species are indigenous to Australia, Tasmania, New Guinea and the
neighboring islands, where they constitute a large portion of
forest vegetation. This being one of the large genera, a great
number of classification schemes have been proposed since its discovery but the system now in use and universally accepted is based
on shape of the anthers.
Eucalyptus are among the world’s important hard woods
and the principal source of timber in Australia. Besides, Eucalyptus oil has got also much importance in commerce. Cultivation of
Eucalyptus got momentum due to its commercial importance throughout the world. Further, rapid growth, ease in cultivation and adoptability have also helped much in wide spread introduction into
many countries specially those poorly endowed with forest resources.
This plant has become such an important factor in the economy of
some countries that millions of trees are now being planted each
year throughout the world.

The note presented here is the first in a series giving preliminary data from the insect collections made by the staff of the
Entomology Section, Forest Research Institute, Chittagong. The major part
of the insects were set and preserved by Mr. Abdul Majid, Insect Setter,
who also took an active part in much of the field collection work •
Since the start of the Entomology Section in July, the
basis of reference collection of insects has been laid . Such collection
of insects from the forested areas of East Pakistan has previously not
been present in the province and is essential for all future forest
entomological work to be carried but, in biology , as well as in control
and extension service .

Introduction
In East Pakistan due to various pressure on the sal
forests, the original crop lias deteriorated further in its
genetic composition, bo vigorous attempts have to be made to
Shorea robusta’, a member of the genus Shorea, belongs
to the family Dipte.rocarpaceae0 Sal (local name) occupies
two main regions of the subcontinent (separated by gangetAc
plain) the Northern and the Central region of Indo-Pakistan,
In East Pakistan it occurs in three areas Dacca, Mymensingh
and Dinajpur-Kangpure Dacca-Mymensingh sal is the tail end
of the Eastern range following Garo Hills of Assam (India)
where_as the Dinajpur-Kangpur sal is the continum of Bengal
Duars.

During the months of June and July, 1970, severe defoliations of
young teak plantations were observed in several localities of Chittagong,
Chittagong Hill Tracts North and Cox’s Bazar Divisions ( see Table I ) •
Especially leaves in the upper part of the crowns were eaten causing the
teak look rather naked as during winter time. The leaves were eaten up
except the major veins, as showns in Figure 1 •

INTRODUCTION;
Dhaincha (Sesbania cannabina ), an annual plant, is cultivated in the riverine deltas, charlands and alluvial banks of rivers in the districts of Dacca, Faridpur and Mymensingh. It also grows in other areas of North, Central and Eastern part of East Pakistan .
Locally it is known as Kath-Dhaincha and botanically falls in the Leguminosae family. There are three plants akin to each other under the names Sesbania Aculeata, Sesbania Cannabania and Sesbania paludosa Sesbania paludosa, commonly known as Shola or Kath-sola, grows in the marshy lands and is lighter in weight than Dhaincha. Sesbania aculeata is a virgate and prickly shrub, whereas Dhaincha, a slender, straight, unarmed plant, grows to a maximum height of 20 feet. Dhaincha plants, flexible when green, become stiff after cutting and drying and are used as fencing material, creeper support and fuel wood. Even by most conser- vative estimates the annual production of the plant is enough for running a large paper mill on perpetual basis.