A Review on Eucalyptus Globulus – An Authentic Herb

In the ancient time Eucalyptus globulus used for the various purpose. It is a tall and an evergreen tree that can grow up to the height of 70m and its diameter is about 4 to7ft. which was first found on the island of Tasmania in 1792 which associate to the Myrtaceae family which is commonly called as Tasmanian Blue Gum, southern blue gum or blue gum are the different names of eucalyptus globulus grow in the various parts of India. The particular species of Eucalyptus globulus have been used for various purposes. It had been found that eucalyptus is a rich source of phytochemical constituent and also possesses medicinal use. The different part of the eucalyptus is very nutritionally and highly valuable therapeutically property because of the presence of some specific chemical composition as its essential oil contain esters, carboxylic acids, aldehyde etc. phytochemical analysis of this tree has revealed that their leaf oil contain 1.8 cineole, cryptophone etc., essential oil had been extracted from its buds. The aim of this review paper is compiling all the information about eucalyptus such as anti-inflammatory, analgesic, anti-nociceptive antimicrobial, anti-fungal, anti-viral and anti-oxidant agent of the nature.

Eucalyptus globulus (Tasmanian blue gum).

Eucalyptus globulus varies from a multi-stemmed shrub on exposed sites to a very tall forest tree, 70-80 m tall, with a large open crown or a medium-sized woodland tree to 20 m. Although found mainly in Tasmania, it also occurs in southern Victoria. The wood is strong and moderately durable and is used for light and heavy construction and regarded as being excellent for cellulose and paper manufacture. It is slightly to moderately salt-tolerant (Marcar et al., 1995). Production from plantation-grown trees is mainly for pulpwood, but also for other timber products. It is an important plantation species in Australia and has experienced outstanding success as an exotic in many countries, with over 1 million ha of plantations established (Eldridge et al., 1993). The species is grown extensively on the Iberian Peninsula, Yunnan province in China and in Chile, for timber, pulp and oil production. The essential oil of E. globulus has dominated the market for cineole-rich oils since soon after the inception of the industry in 1852 (Doran and Saunders, 1993).

Field studies of a high elevation population of northern Greater glider Petauroides volans minor in the Bluff State Forest, Far North Queensland

ABSTRACT We present the results of field surveys and a radio-tracking study of the Greater glider Petauroides volans minor in the Bluff State Forest, North Queensland. Twenty-three spotlighting transects were surveyed twice in July 2018, mean abundance of P. v. minor was 0.24 ha−1 in wet sclerophyll and 0.38 ha−1 in dry sclerophyll forest. Field observations (n= 330) were collected from nine radio-collared animals across three field sites from July to October 2019. 95% kernel home range estimates varied, ranging from 1.03–11.45 ha. Observations of denning (n=66) across 22 den trees identified that the gliders utilised between 1 and 4 dens during the study. Den trees were predominantly large Blue gum Eucalyptus tereticornis, with Gum-topped box Eucalyptus moluccana, Narrow-leafed ironbark Eucalyptus drepanophylla, Tindale’s stringybark Eucalyptus tindaliae and unidentifiable tree stags were used to lesser extent in one field site. Mean availability of suitable den trees was 2.07±1.12 per ha in Site 1 and 2, and 1.57±1.24 in Site 3. Foraging observations (n=148) were collected, Pink Bloodwood Corymbia intermedia and E. moluccana were the most commonly observed feed trees utilised by the study animals during the tracking period. This study provides baseline data for P. v. minor within high elevation habitat (950 to 1000 m) at its most northern extent. Given the widespread decline of P. volans across much of its range, these data may be used for developing local conservation strategies for the species in North Queensland.

Fueling the Colonial Future

As its record in California, southern India, and elsewhere suggests, of the many biotic exchanges of the long nineteenth century, the case of the Australian blue gum tree (Eucalyptus globulus) is one that especially transcends bilateral, spatial, or imperial framing. The blue gum instead invites more material and temporal perspectives to its spread: since its reputation accrued over time in diverse colonial settings, its adoption was contingent on the extent to which local tree cover was feared to have been depleted, and its growth was hoped to secure the futures of colonial states. Focusing on nineteenth-century understandings of the biological characteristics of the blue gum in southeastern Australia, South Asia and California, and the circulation of this knowledge between these sites, this article draws on the insights of neo-materialism to argue that this tree’s value and importance lay in its perceived ability to rapidly provide fuel wood for the empowerment of colonial states. This article is part of the “Crossroads of Indo-Pacific Environmental Histories” special issue of Pacific Historical Review.

Effect of Tasmanian blue gum (Eucalyptus globulus Labill.) leaf extract on cowpea weevil (Callosobruchus maculatus [Fabricius, 1775], Coleoptera: Chrysomelidae)

<div class="WordSection1"><p>A laboratory study was carried out to examine the efficacy of solvent extract of <em>Eucalyptus globulus</em> leaves in reducing post-harvest losses caused by cowpea weevil<em> </em>(<em>Callosobruchus maculatus</em>) on cowpea seed variety RSH 256. 450 g of <em>E. globulus </em>leaf powder were put in 1000 ml flask and 450 ml of n-hexane was used as the solvent. The extract was tested at dosages of 50, 100 and 150 µl 50 g^-1 of cowpea grains on the weevil in stored cowpea. The different rates of treatment recorded significant differences (<em>p</em> &lt; 0.05) in causing adult mortality compared to the untreated control. The different rates of treatment also recorded significant differences (<em>p</em> &lt; 0.05) in emergence of F1 adults of each treatment compared to the control. The percentage masst loss and grain damage were also suppressed as a result of treatment with the plant material compared to the untreated control. However, among the treatments 150 µl 150 g^-1 cowpea recorded the highest adult mortality rate and lowest emergence while control had the lowest mortality rate and the highest emergence of the insect. The rates of application were indicative of bioactive characteristics of the plant extract.<strong></strong></p></div>

Management of Blue Gum Chalcid (Leptocybe invasa Fisher & La Salle (Hymenoptera: Eulophidae) infestation on different species of Eucalyptus trees in Kalu district, Eastern Amhara, Ethiopia

The recently introduced chalcid pest known as the Blue Gum Chalcid (BGC) (L. invasa) is currently one of the major insect pests of Eucalyptus tree species in Ethiopia. A research was conducted in Kalu district, South Wollo, Eastern Amhara, Ethiopia, the main objective of which was to evaluate the effectiveness of synthetic insecticides, hoeing and water showering options against BGC. Two parallel experiments were conducted in the nursery and in the field. Eucalyptus camaldulensis, E. saligna, E. viminalis, E. citrodora and E. globulus were considered in the nursery at Chorisa. One to three-year old E. camaldulensis plantations were considered at Tikuro plantation site. At the nursery, seven treatments and at the field 10 treatments were tested in a Randomized Complete Block Design (RCBD) with three replications from January to February 2019, where treatments were applied 3 times at 15-day intervals. Results from the 1-year old plantation revealed that application of Dimethoate 40%, Carbofuran 3G and Dimethoate 40% + hoeing followed by Carbofuran 3G + hoeing and Thiamethoxam 25WG were effective in checking the BGC insect pest infestation. In the 3-year old plantation, Carbofuran 3G significantly reduced the infestation followed by Dimethoate 40%. At the nursery, Dimethoate 40% and Carbofuran 3G reduced the infestation followed by Carbofuran 3G + Dimethoate 40% and thiamethoxam 25WG. Water showering and hoeing did not reduce BGC infestation in all cases at the field plantations. Treatments that received synthetic insecticides and hoeing had low infestation, the reason for which was the insecticide rather than the hoeing, because the hoeing alone didn’t differ from the control. Application of Dimethoate 40% and Carbofuran 3G with hoeing and weeding activities were recommended to manage and limit BGC insect pest infestations.