Laporan baru tungau Tarsonemus bilobatus Suski dan karakter utama tungau lain pada daun tanaman jeruk di Pulau Jawa, Indonesia

Citrus is one of the most important fruit crops in Indonesia. One of the main problems in citrus production is mite infestation. Many mite species were reported attacking citrus around the world. This study was aimed to identify mites and describe the main characters of various species of mites on citrus in Java, Indonesia. Sampling was carried out at the location of citrus plantations and citrus plants in the yard of the house which was carried out purposively. In a large planting area, sampling was carried out on 10 citrus trees that showed symptoms of mite attack. The identification process is carried out by a mounting process to obtain specimens that can be observed under a compound microscope using PVA. Eight species of mites were collected from 8 various of citrus from 15 location. Six mites species were identified as phytophagous, i.e., Panonychus citri McGregor, Eotetranychus sp., Eutetranychus sp. (Family Tetranychidae), Brevipalpus phoenicis (Geijskes) (Family Tenuipalpidae), Tarsonemus bilobatus Suski (Family Tarsonemidae), and Phyllocoptruta oleivora (Ashmead) (Family Eriophyidae). Meanwhile, the other two species, Amblyseius sp. (Family Phytoseiidae) and Cheletogenes ornatus (Canestrini & Fanzago) (Family Cheyletidae) were predators. Unidentified mites were Family Tydeidae and Winterschmidtiidae. According to Regulation No. 31 of 2018, P. citri and Ph. oleivora are quarantine pest. T. bilobatus is firstly reported in Indonesia.

Predatory mite fauna associated with agri-horticultural crops and weeds from the Gangetic Plains ofWest Begal, India*

Astudy was conducted in 2008–2009 to explore the predatory mite fauna from different agri-horticultural crops and weeds in the Gangetic plains ofWest Bengal. A total of 31 species belonging to nine genera, seven families and two orders were identified; they are listed along with their prey, period of occurrence and the plant habitats in which they were recorded. The most frequently collected specieswere the phytoseiids Amblyseius largoensis (Muma) and Neoseiulus longispinosus (Evans), the stigmaeids Agistemus spp. and the anystidWalzia indiana Smith-Meyer&Ueckermann.Given the frequencywithwhich these mites were found, they can be considered potentially useful in suppressing the associated prey mites. The phytoseiids Paraphytoseius multidentatus Swirski & Schechter, Euseius ovalis (Evans), Euseius coccineae (Gupta), Neoseiulus fallacis (Garman) and the cheyletid Cheletogenes ornatus (Canestrini&Fanzago) were less frequently found and less abundant, implying that their impact on prey population is less important. The remaining species were rare.