This work presents data about distribution of Opuntia humifusa (Raf.) Raf. within Sevastopol territory. During this research eight localities were described, the characteristics of the plant morphological parameters and some biological features were revealed. Analysis of the current status of the populations, description of various communities with opuntia permitted to determine its highest status of naturalization and refer it to the transformer cultivars. This species successfully self-renews by vegetative and seed ways and trends to further dissemination.
Hyphantria cunea Drury is a polyphagous quarantine pest, which is not evolutionarily tied to the territory of Ukraine. We have analyzed data from literary sources on the geographical spreading of Hyphantria cunea Drury, indicated the current area of the pest and noticed factors that influence the acclimatization of a pest. The motherland of Hyphantria cunea Drury is North America; in 1770, an entomologist Druri first described this species. The first indications of the harmfulness of Hyphantria cunea Drury are noted in the USA in 1899 and on the European continent Hyphantria cunea Drury was found near the city of Budapest (Hungary) on the island of Chepel in August 1940. By 1948, the pest had spread throughout Hungary and began to occupy the tree plantations of neighbouring countries, such as the Czech Republic, Slovakia, Yugoslavia, Romania, and Austria. At present, the pest is widespread in Europe, Asia, and North America. In Europe Hyphantria cunea Drury was found in countries su...