Smaller, yellowish brown areas of diseased grass [Zoysia matrella (L) Merr.] were observed scattered in a home garden lawn in Kandy District (Central Province) of Sri Lanka. There was also a ring of brown grass and whitish aerial mycelium grown in between foliage and runners, boarding a greenish...

Eastern hemlock (Tsuga canadensis [L.] Carriére) in the United States is threatened by the invasive hemlock woolly adelgid (Adelges tsugae Annand). The native hemlock looper (Lambdina fiscellaria Guenée) also appears to have played a role in previous population declines of this conifer. Although...

Halyomorpha halys (Stǻl) (Hemiptera: Pentatomidae) is a highly polyphagous invasive species and an important pest of orchard crops in the United States. In the Mid-Atlantic region, wild hosts of H. halys are common in woodlands that often border orchards, and H. halys movement from them into...

Effects of invasive European earthworms in North America have been well documented, but less is known about ecological consequences of exotic Asian earthworm invasion, in particular Asian jumping worms (Amynthas) that are increasingly reported. Most earthworm invasion research has focused on...

A phytoplasma of the 'aster-yellows'-group was detected in carrots by the Center for Agricultural Technology Augustenberg (LTZ Augustenberg in the federal state of Baden-Württemberg) in the year 2011. It could be identified as Candidatus Phytoplasma asteris by sequence analysis of the...

The introduction of exotic species may have severe effects on native ecosystems by disrupting communities and ecosystem services. Consequently, assessing the functional role of a species newly added to a community is an important task in order to identify native species at risk. In Argentina, the...

Post planting assistance techniques during early ontogeny may be a determining factor for tree survival in stressful habitats. In the eastern region of NW Patagonia, stands of the fast-growing exotic conifers Pinus ponderosa (Ponderosa pine) and Pseudotsuga menziesii (Douglas fir) are being...

Aspects of the dispersal characteristics of two nonnative shrubs, Elaeagnus umbellata and Ligustrum sinense, were compared with those of two native shrubs, Cornus amomum and Frangula caroliniana, to identify factors that contribute to successful invasion of the nonnative species. For each species,...

Two gall wasps were detected for the first time on the foliage and branches of Eucalyptus sp. trees in Syria. Leptocybe invasa Fisher and LaSalle detected in Aleppo, induced galls on petioles, leaf midribs and young branches, while Ophelimus maskelli (Ashmead) induced galls on Eucalyptus leaves. In ...

In September of 2012, typical symptoms of Sclerotinia blight were observed on groundnut in Shuangcheng, Heilongjiang Province, China. Approximately 50% of the plants in a field were infected. Symptoms began as a chlorotic wilt on the foliage and developed into necrosis of basal stems. At advanced...