RESEARCH ON THE ENTOMOFAUNA OF ORTHOPTERA IN SOME VEGETABLE CROPS IN SOUTHERN OLTENIA

Orthoptera comprise an order of common insects, most of which are phytophagous, but there are also predatory orthoptera. They are found all over the world and adapt to the environmental conditions in which they are found. Orthoptera insects are pests of vegetable plants, destroying large areas, so vegetable growers are familiar with them. The research was carried out in the Amărăștii de Jos stationary in 2020 in vegetable crops. The aim of the research was to identify orthoptera species in vegetable crops and two methods were used to collect them: the beer trap method and the Barber soil trap method). Orthopteran insects were identified with the help of specialized determiners, then classified by family down to species level. Orthoptera currently identified in the stationary studied included six species, namely: Gryllotalpa gryllotalpa, Gryllus campestris, Gryllus desertus, Acrida hungarica, Dociostaurus maroccanus and Calliptamus italicus. The species with the most specimens is Gryllotalpa gryllotalpa (42 specimens) and the species with the fewest specimens is Dociostaurus maroccanus (3 specimens).

Фітосанітарний моніторинг шкідливої ентомофауни посівів сої в умовах рисових зрошувальних систем

Мета. Визначення видового складу ентомофагівта виявлення домінуючих шкідників посівів сої у корот-коротаційних рисових сівозмінах Південного СтепуУкраїни. Методи. Польовий, лабораторний, розрахунко-во-порівняльний і статистичний. Результати. Отриманоінформацію щодо видового складу шкідників у посівахсої та встановлено їх домінуючі види у короткоротаційнихрисових сівозмінах: метелик лучний (Margaritia sticticalis L.),сонцевик будяковий, або чортополохівка (Vanessacardui L.), клоп трав’яний (Lygus rugulipennis Popp.), клоплюцерновий (Adelphocoris lineolatus Goeze.), щитниклюцерновий (Piezodorus lituratus F.), трипс тютюновий(Thrips tabaci Lind.), совка-гамма (Autographa gamma L.),совка люцернова (Chloridea viriplaca Hfn.), коник зелений(Tettigonia viridissima L.), прус італійський (Calliptamusitalicus L.), попелиця велика злакова (Sitobion avenae F.),кліщ павутинний звичайний (Tetranychus urticae Koch.),сарана мароканська (Dociostaurus maroccanus Thunb.),цикадка шестикрапкова (Macrosteles laevis Kib.); цика-дка смугаста (Psammotettix striatus L.), елія носата (Aeliarostrata Bsh.), довгоносик смугастий бульбочковий(Sitona lineatus L.), довгоносик сірий щетинистий (Sitonacrinitus Hfn.), совка бавовникова (Helicoverpa armigera),вогнівка акацієва (Etiella zinckenella Tr.). Висновки.Кількість виявлених видів шкідників у посівах сої становила: ряд лускокрилих (Lepidoptera) – 38,0%; ака-риформні кліщі (Acariformes) 22,0%, бахромчастокрилі(Thysanoptera) – 17,0%, напівтвердокрилі (Hemiptera) –10,0%, представники ряду рівнокрилих (Homoptera) – 5,0%,прямокрилих (Orthoptera) – 5,0% та твердокрилих(Coleoptera) – 3,0%. Домінуючими видами в умовах рисо-вих чеків були: метелик лучний (Pyrausta sticticalis L.) –15 екз./м2, трипс тютюновий (цибулевий) (Thripstabaci Lind.) – 50 екз./м2, звичайний павутинний кліщ(Tetranychus urticae Koch.) – 47 екз./рослину, сонце-вик будяковий (чортополохівка) (Vanessa cardui L.) –від 2 до 5 екз./м2.

Distribution Patterns of Grasshoppers and Their Kin over the Eurasian Steppes

The main aims of this paper are to reveal general patterns of Orthoptera distribution in the Eurasian steppes, to evaluate long-term trends of changes in distribution of taxa and populations, and to estimate the potential for population changes relative to human activity and global warming trends. The main publications concerning diversity and distribution of these insects over the steppes are analyzed. The fauna of the Eurasian steppes includes more than 440 species of Orthoptera. The general distribution of grasshoppers and their kin in the Eurasian steppes reflects their common associations with different grasslands. The species richness increases from the relatively cold forest-steppes to the semi-deserts with their warm summer. There are some endemic or subendemic taxa, including the tribe Onconotini (Tettigoniidae). The populations’ distribution of Orthoptera is also analyzed. The populations of native Orthoptera extend through all the herbaceous landscapes. Under these conditions, the interrelating of colonies of each species may result in great abundance. The population distribution of three species locusts (Locusta migratoria, Calliptamus italicus, Dociostaurus maroccanus) is also discussed. Some notable changes of their populations’ distribution and dynamics are characterized. The situation with rare Orthoptera is estimated. Retrospective and prospective of the steppe fauna of Orthoptera are discussed.

The species composition of the harmful entomofauna of soybean crops in the conditions of rice paddies

Goal. To determine the species composition of soybean phytophages under rice checks. Methods. The main field method with related phenological observations and analyzes. The study of the species composition of soybean pests was carried out in rice paddies of the Institute of Rice of the NAAS by collecting all objects with their subsequent identification. The survey was carried out once every 3—7 days: the first counts were in the third decade of May, when the plants were in the germination phase. Recorded plants were placed diagonally. On the experimental site, five plants were examined in 20 places. Results. Studies have been carried out to clarify the species composition of harmful entomofauna in soybean crops under the conditions of rice checks in the Southern Steppe of Ukraine. Found 20 species of phytophagus from 7 rows and 11 families and one species of spider mite: мeadow moth (Margaritia sticticalis L.); thistle, or vanessa thistle (Vanessa cardui L.); grass bug (Lygus rugulipennis Popp.); alfalfa bug (Carpocoris fuscispinus Boh.); alfalfa stink bug (Piezodorus lituratus F.); tobacco thrips (Thrips tabaci Lind.); scoop-gamma (Autographa gamma L.); alfalfa moth (Chloridea viriplaca Hfn.); green horse (Tettigonia viridissima L.); Italian Prussian (Calliptamus italicus L.); large cereal aphid (Sitobion avenae F.); Moroccan locust (Dociostaurus maroccanus Thunb.); six-point leafhopper (Macrosteles laevis Kib.); striped leafhopper (Psammotettix striatus L.); nosy tree (Aelia rostrata Bsh.); striped nodule weevil (Sitona lineatus L.); gray bristly weevil (Sitona crinitus Hfn.); cotton scoop (Helicoverpa armigera Hfn.); acacia moth (Etiella zinckenella Tr.), two-spotted spider mite (Tetranychus urticae Koch.). Conclusions. As a result of research in the conditions of the Southern Steppe of Ukraine, 20 species of phytophagous insects from 7 rows, 11 families and one species of tick were found in soybeans. The vast majority of pests in terms of numbers are among the Lepidoptera — 38%. These species damaged soybeans during the growing season and influenced the formation of the yield.

An Ecological Niche Model for Dociostaurus maroсcanus, Thunberg, 1815 (Orthoptera, Acrididae): The Nesting Environment and Survival of Egg-Pods

Since the earliest times, the problem of the locust has been a very serious one for agriculture and food production in particular. Devastating locust plagues are known from the Old and the New World where locust swarms terrified the earliest settlement and towns, leaving not a single green branch on the fields. Ways to combat locust plagues were often ineffective or extremely expensive due to a lack of information on the exact location of the newly hatched locusts; and the lack of an accurate assessment of the number of locusts in currently forming swarms. Rapidly developing GIS applications, especially as part of environmental modelling, appear to be a good means of forecasting a locust plague, being based on accurate ground observation and expert knowledge of the biology and ecology of the locust species. This paper represents an example of extended ecological modelling for the nesting conditions of Dociostaurus maroccanus, a well-known gregarious acridid species, with emphasis on the explanation of key environmental variables as revealed by the model.

An Ecological Niche Model for Dociostaurus maroсcanus, Thunberg, 1815 (Orthoptera, Acrididae): The Nesting Environment and Survival of Egg-Pods

Since the earliest times, the problem of the locust has been a very serious one for agriculture and food production in particular. Devastating locust plagues are known from the Old and the New World where locust swarms terrified the earliest settlement and towns, leaving not a single green branch on the fields. Ways to combat locust plagues were often ineffective or extremely expensive due to a lack of information on the exact location of the newly hatched locusts; and the lack of an accurate assessment of the number of locusts in currently forming swarms. Rapidly developing GIS applications, especially as part of environmental modelling, appear to be a good means of forecasting a locust plague, being based on accurate ground observation and expert knowledge of the biology and ecology of the locust species. This paper represents an example of extended ecological modelling for the nesting conditions of Dociostaurus maroccanus, a well-known gregarious acridid species, with emphasis on the explanation of key environmental variables as revealed by the model.