The results of catching winged aphids with water traps on potato plantings in the southern part of the Arkhangelsk region

Dynamics of the number and species composition of aphids were studied on seed potatoes using yellow water traps in the southern part of the Arkhangelsk region in 2018-2019. 12 species of winged aphids (165 insects) were identified in 2018, and 16 species (115 insects) - in 2019. The following types dominated: black bean aphid A. fabae Scop., bird cherry-oat aphid R. padi L., blackcurrant-sowthistle aphid H. lactucae L., glasshouse-potato aphid A. solani Kalt. The share of aphids as direct and indirect vectors of viral diseases was 91 % of the total number in 2018, and 79.1 % in 2019. The pest population of potato plants depended directly on weather conditions of the growing season. The sum of the average daily temperatures during the period of catching aphids was 1273.3 C in 2018, and 983.3 C - in 2019. During the experimental period, 131.6 mm of precipitation fell in 2018, and 280.4 mm - in 2019. Due to the constant presence of aphids on seed potato crops, annual monitoring of pest population and, in case of necessity, protective measures are required.

Hymenopteran color preference using multiple colours of pan traps in Slovakia

The study presents results of colour preference of insects (Insecta), mainly from the order Hymenoptera (families Apidae, Formicidae). The research was carried out in the vicinity of the Beniakovce village (near the Košice city) over the years 2010–2012. Trapping by coloured water traps was conducted at ten sites with 50 Moerick′s water traps coloured with five different colours (white, yellow, blue, purple, and red). On the study area there were 12 357 individuals captured, belonging to 17 higher taxa (class, order, suborder) or genus morpho group of families Apidae and Formicidae. The highest abundance was found in Diptera followed by Hymenoptera, Coleoptera and Lepidoptera. Obtained results were in accordance with literature data, which showed that yellow colour was the most preferred by insects. Our results confirmed high degree of diversity of insect’s fauna in the study area. Our study suggested that a modified Moerick′s water traps may be a valuable tool in studies on insect diversity, distribution, seasonal abundance, and foraging behaviour as well.

Control of cabbage stem weevil and pollen beetle with one insecticide application

Over the course of three years (2016–2018), the effects of insecticides on stem-mining weevils [(Ceutorhynchus pallidactylus (Marsham, 1802), Ceutorhynchus napi (Gyllenhal, 1837)] were assessed under field conditions. The dates for spraying were determined on the basis of the recorded percentages of weevil females carrying mature eggs in their ovaries (timing I: the first females with mature eggs present in yellow water traps; timing II: more than 50% of the females with mature eggs present). Delaying the first spring insecticide application till timing II made it possible to combine the control of the stem weevil along with the control of the pollen beetle, Brassicogethes aeneus (Fabricius, 1775). However, the poor effectiveness of the tested insecticides on the stem-mining weevils, regardless of the date they were sprayed, indicates it is impossible to successfully control the insect pests with one insecticide application during the seasons with prolonged egg-laying periods.

New Records of Aphid Species Caught in Water Yellow Traps in Greece

A number of yellow Moericke water traps were placed in Cotton, tomato, tobacco, pot­ato, squash and maize fields in Boiotia, Thessalia, Macedonia and Aitoloakarnania from June to the end of 1992. From a limited number of trip captures examined, fifty nive aphid species were identified of which twenty species arc new records for Greece.

Twenty Three Aphid Species Νew to the Greek Aphidofauna Caught in Yellow Water Traps in Tobacco Fields

Aphid species abundance was studied by means of yellow Moericke water traps in several tobacco fields in two tobacco growing areas, Aitoloakarnania and Pieria, Greece. In 1992, from alate catches, in three different localities in Aitoloakarnania, a total number of 69, 40 and 31 taxa were caught and identified. Five of them are new records for the Greek aphidofauna. In 1993, from the traps established near Agrinio and in Nea Ephessos, Pieria, a total number of 55 and 139 aphid taxa were caught and identified. Twenty one of them aphid species are new records for Greece of which 3 had been already recorded in the previous year. In total, 23 aphid species recorded for the first time in Greece are presented in this work.

Comparisons Between Alate Aphids Caught in Υellow Water Traps and Aphid Populations on Tomato Plants

Aphid monitoring was conducted by means of yellow Moericke water traps placed in tomato fields in two different localities in Co Boiotia during the growing seasons in 1992 and 1993. Additionally, aphid population densities were estimated by plant sampling. Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) were the only species which developed populations on plants. Regression analysis between the number of alates from traps with either the number of alates or the total aphid population on plants showed that there was no correlation in the case of M. persicae for both localities and years. However, there were significant relationships between the number of alates in traps and either the number of alates on plants (r2=0.83) or the total aphid population on plants (r2=0.69) for M. euphorbiae in 1992. In 1993, such significant relationships were not found for the latter species, most probably due to extremely low trap catches. Significant relationships were also found between alates in traps, during their immigration period, with either alates on plants (r2=0.93) or the total population on plants (r2=0.80) in M. euphorbiae in 1992.

Keanekaragaman Musuh Alami Tanaman Padi pada Lahan Lebak di Tiga Desa Kecamatan Sungai Pandan Kabupaten HSU

Utilization of insect diversity is useful in overcoming pest in the field, by using parasitoids and predators to control pests, can prevent the use of toxic chemicals in the field, while providing a safe haven for other species to live and play its role in maintaining the health of the ecosystem. Insect diversity in South Kalimantan, especially paddy fields in swampy areas largely unknown, and therefore need to be examined. The aim of this study is to identify and assess the diversity of natural enemies in paddy crop in swampy areas, especially in the three villages in the district of Sungai Pandan, Hulu Sungai Utara. This study was conducted from February - June 2015. The method used in this research is survey method with direct observation with an area of rice fields has been determined, and sampling arthropod natural enemies by using a swinging nets, water traps and light traps. Results from this study are: (1) The number of arthropod natural enemies found in shallow swamps is 20 species from seven orders, mid swamps and in each of the 16 species of seven orders; (2) The highest predator arthropod population in the shallow swamp area is Micraspis sp., The middle swamp is Paederus fuscipes, and the deep swamp is Micraspis sp. ; and (3) the diversity index of natural enemies of arthropods on the third mainland is low