Туруни (Carabidae) Ківерцівського національного природного парку «Цуманська пуща»: попередні дослідження

Робота відображає підсумки першого вивчення турунів у межах Ківерцівського національного природного парку «Цуманська пуща» – унікальної природної пам’ятки на північному заході України. Національний природний парк розташований у межах Ківерцівського адміністративного району Волинської області і займає площу 33475,34 га. Створений на базі найбільш цінних дубових та сосново-дубових лісових масивів. Дослідження проводили у 2017–2019 рр. методами маршрутних зборів та косіння ентомологічним сачком. Обстежено заплавні луки р. Конопельки поблизу с. Сокиричі, с. Муравище, с. Пальче, ліс в урочищі Папики поблизу с. Дерно, ліс поблизу с. Дачне, луки та ліс поблизу смт Цумань, ліс поблизу м. Ківерці, заплави річок Путилівки (с. Ставок, смт Цумань), Кормин (поблизу с. Берестяне), Рудки (неподалік с. Журавичі), Грушвиці (неподалік с. Омельне), меліоративні канали та луки навколо них (с. Дерно, смт Цумань).У Ківерцівському національному природному парку «Цуманська пуща» зареєстровано 39 видів турунів, що належать до 20 родів. Найбільше видове різноманіття має рід Pterostichus, до якого належить 8 видів. Тільки на згарищі зареєстровано 8 видів: Agonum sexpunctatum, Amara communis, Amara curta, Amara tibialis, Bembidion lampros, Dyschirius globosus, Poecilus versicolor, Pterostichus minor, лише в сосновому лісі виявлено Amara familiaris, лише в дубовому лісі трапляються 15 видів: Agonum gracilipes, Amara aenea, Calosoma inquisitor, Carabus coriaceus, Carabus hortensis, Harpalus latus, Leistus rufomarginatus, Leistus terminates, Limodromus assimilis, Nebria brevicollis, Notiophilus biguttatus, Pterostichus melanarius, Pterostichus strenuous, Stomis pumicatus, Synuchus vivalis. Видове багатство зростає за градієнтом: сосновий ліс – дубовий ліс – згарище. У сосновому лісі індекс Маргалефа становить 1,93, у дубовому – 3,55, на колишньому згарищі – 4,42. Найбільшу спільність видів турунів мають біотопи дубового лісу і згарища (0,48), середній показник спільності властивий для лісових біотопів (0,44), найменша подібність видового складу турунів властива біотопам соснового лісу та згарища (0,28).

Undersowing rutabaga with white clover: impact on Delia radicum (Diptera: Anthomyiidae) and its natural enemies

The cabbage maggot, Delia radicum (L.), is a serious pest of cruciferous crops in temperate regions of North America and Europe. The effects of undersowing rutabaga, Brassica napus L. subsp. rapifera Metzg. (Brassicaceae), with white clover, Trifolium repens L. (Leguminosae), on second-generation cabbage maggot and its natural enemies were studied in Newfoundland in 1997 and 1998. In 1997, totals of 1311 and 724 eggs were recovered from bare and undersown plots, respectively. More eggs were present in bare plots than undersown plots on various specific dates. In 1997, rutabagas from bare plots weighed more than those from undersown plots, although damage ratings were similar, suggesting that competition, not cabbage maggot feeding, caused the yield differences. In 1998, there were few cabbage maggots present and little damage or yield reduction in either treatment. Similar numbers of cabbage maggot pupae were extracted and reared from each treatment in each year. In 1997, of the pupae reared from undersown plots, 48% produced cabbage maggot flies, 14% produced parasitic Hymenoptera, and 8% produced Aleochara bilineata Gyllenhal (Coleoptera: Staphylinidae); 19% of the pupae from bare plots produced cabbage maggot flies, 8% produced parasitic Hymenoptera, and 36% produced A. bilineata. More A. bilineata were captured in pitfall traps in bare plots than in undersown plots. The effect of clover on carabid beetles was species specific. There were more Bembidion lampros (Herbst) and Amara bifrons (Gyllenhal) in bare plots in 1997, and more Pterostichus melanarius (Illiger) in undersown plots in both years. Despite consistently lower egg numbers in undersown plots than in bare plots, the numbers of pupae in the two treatments were similar at the end of the season. We speculate that this may be due to differential, density-dependent mortality of immature stages of cabbage maggot caused by predators and parasitoids.

The within-field spatial and temporal distribution of arthropods in winter wheat

The within-field spatial distribution of some common farmland arthropods from the Carabidae, Araneae and Collembola was assessed using two-dimensional grids of pitfall traps distributed across whole winter wheat fields. In the first year, the extent to which arthropod capture was influenced by location within the field and sampling intensity was examined using a nested grid design (1.5 m, 7.5 m and 30 m spacings). In the second year, distributions within two different-sized winter wheat fields were compared. Spatial pattern and association between arthropods and weed cover were analysed using SADIE and trend surfaces were used to visualize distributions. Many of these arthropod groups exhibited aggregated distributions within the fields in clusters larger than 30 m across, demonstrating that the numbers captured will vary depending on the location of sampling within a field. Amara species, Bembidion lampros Herbst, Carabidae and Lycosidae were predominantly found within 60 m of the field edge. Nebria brevicollis Fabricius and Pterostichus madidus Illiger were found within the field in patches of one and two hectares, respectively. Linyphiidae were relatively homogeneously distributed across the fields. There was some evidence of clustering by Collembola. The spermophagous Carabidae and Lycosidae were positively associated with the degree of weed cover. SADIE analytical techniques were useful for identifying the importance and location of patches with greater and less than average numbers, although a minimum of 36 sample points is recommended.

RESIDUAL TOXICITIES OF THREE INSECTICIDES TO FOUR SPECIES (COLEOPTERA: CARABIDAE) OF ARTHROPOD PREDATOR

In laboratory bioassays, four carabid species [Agonum dorsale (Pontoppidan), Bembidion lampros (Herbst), B. obtusum Serville, and Demetrias atricapillus (L.)] that are important predators of aphids in cereals in the United Kingdom were exposed to deposits of deltamethrin, dimethoate, or pirimicarb on glass for up to 72 h. We detected differences between compounds and species that are discussed in the context of exposure of these predators to insecticides in the field. We also describe problems involved in obtaining comparative toxicity data when dilutions of field application rates for target species are used in bioassays with nontarget species. Such problems add another dimension to risk assessment based on laboratory data.