Faunistic composition and nutrition types of the Hymenoptera Complex in a plum orchard (II)

In the plum orchards the faunistic composition of Hymenoptera insects was studied using yellow sticky traps. As a result, the presence of 26 families was indicated including three dominant, containing many potentially important species in protection against plum pests.

Inventory and Identification of Arthropods on Dates (Phoenix dactylifera L.)

Dates (Phoenix dactylifera L.) belong to the Arecaceae family of palms. Banjarbaru is one of the areas that started planting date palms in South Kalimantan. The community's knowledge of date pests still lacks. Therefore it becomes a problem for farmers. Before proper control is carried out, it is necessary to understand the types of pests first. Arthropod data on date palms at the Plantation and Livestock Service Office of South Kalimantan Province are not available. Hence, it is necessary to conduct inventory research and arthropod identification. This study aimed to determine the types of arthropods in date palms (P. dactylifera L.) in Banjarbaru. The method used was a survey method with purposive sampling carried out by collecting arthropods using swing nets, yellow sticky traps, and directly from four different locations. The field observations at four locations found 43 types of arthropods totaling 98 individuals. Twenty arthropods act as pests, 13 individuals as pollinators, and 10 individuals as predators. The arthropods were classified into ten orders and 27 families, with the largest number of individuals coming from the Lepidoptera order.

Publisher Correction: Rapid and low-cost insect detection for analysing species trapped on yellow sticky traps

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Rapid and low-cost insect detection for analysing species trapped on yellow sticky traps

While insect monitoring is a prerequisite for precise decision-making regarding integrated pest management (IPM), it is time- and cost-intensive. Low-cost, time-saving and easy-to-operate tools for automated monitoring will therefore play a key role in increased acceptance and application of IPM in practice. In this study, we tested the differentiation of two whitefly species and their natural enemies trapped on yellow sticky traps (YSTs) via image processing approaches under practical conditions. Using the bag of visual words (BoVW) algorithm, accurate differentiation between both natural enemies and the Trialeurodes vaporariorum and Bemisia tabaci species was possible, whereas the procedure for B. tabaci could not be used to differentiate this species from T. vaporariorum. The decay of species was considered using fresh and aged catches of all the species on the YSTs, and different pooling scenarios were applied to enhance model performance. The best performance was reached when fresh and aged individuals were used together and the whitefly species were pooled into one category for model training. With an independent dataset consisting of photos from the YSTs that were placed in greenhouses and consequently with a naturally occurring species mixture as the background, a differentiation rate of more than 85% was reached for natural enemies and whiteflies.

Seasonal Captures of Trissolcus japonicus (Ashmead) (Hymenoptera: Scelionidae) and the Effects of Habitat Type and Tree Species on Detection Frequency

Trissolcus japonicus, an important egg parasitoid of Halyomorpha halys in Asia, was first detected in the USA in 2014. To evaluate the effect of habitat and the seasonality of T. japonicus detections in the USA, yellow sticky traps were placed in the canopy of Ailanthus altissima growing at the edge of isolated patches of trees, windbreaks, and woodlots in northern Virginia in 2018 and 2019. In both years, captures occurred from May to September, and peaked in July and August. While T. japonicus was detected in all habitats, there was not a consistent effect of habitat type on capture frequency. To evaluate tree species effects on T. japonicus captures, in 2017 and 2018, yellow sticky traps deployed in the canopy of A. altissima bordering apple orchards were paired with a nearby trap in one of several wild tree species along a common woods edge. In 2019, these traps were deployed in A. altissima, black walnut, and black locust growing in the same windbreaks. No consistent association between captures of T. japonicus or native parasitoids of H. halys and the tree species sampled was observed among years. Results are discussed in relation to the ecology and sampling optimization of T. japonicus.

Evaluation of lures for monitoring the population of thrips and whitefly in the major horticultural crops in Nepal

Field experiment was conducted to evaluate the effectiveness of whitefly and thrips lure in yellow stick traps in major horticultural crops in IRD station, Dahachowk & Nala, Nepal. This experiment was carried out from June to September, 2019. Six major horticultural crops have been selected. In each cropping area yellow sticky traps with whitefly lure, yellow sticky traps with thrips lure and yellow sticky traps only has been setup. Weekly data of insects has been recorded with the help of hand lens. In yellow sticky traps wide range of insects whitefly, thrips, leaf miner, winged aphids, housefly, fungus gnats, fruit fly, Tuta absoluta whereas, some beneficial insects as bee, wasp, beetle has been monitored. Analysis of variance was carried out as per the procedures given in R-STATC statistical computer package for the paired two T- tests. Thrips lure has shown significant result against thrips whereas whitefly lure doesn’t show any notable effects against whitefly over yellow sticky traps. Further research on such lure will be valuable for the farmers in different agro-climatic locations of the country for validation.

A first Canadian and three new Québec records of Cicadellidae (Hemiptera) in grapevine (Vitaceae): potentials virus vectors

A comprehensive biovigilance programme was undertaken in 2018 to monitor potential insect vectors of viruses of grapevines (Vitis vinifera; Vitaceae) in two vineyards in Québec. Two hundred seventy-four insects were collected using yellow sticky traps and sweeping nets. Collected specimens were first classified into orders, with special attention given to the Hemiptera order, which is the main group of virus vectors. Hemipteran pests were identified to species. Among these specimens, one adult of Rossmoneura tecta McAtee (Hemiptera: Cicadellidae) was identified, the first report of this species in Canada. Empoasca vincula DeLong, Erythroneura acuticephala Robinson, and Erythroneura cymbium McAtee, three other species belonging to the same family and previously reported in other Canadian provinces, were also identified for the first time in Québec. Further investigations are being undertaken to test the ability of these species to transmit grapevine viruses.