Brownheaded Ash Sawfly

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Pests of Trees and Shrubs Brownheaded ash sawfly Tomostethus multicinctus Order Hymenoptera, Family Tenthredinidae; common sawflies Introduced pest Host plants: Red and white ash Description: Adult sawflies are wasp-like. Larvae are 15–20 mm in length. They are greenish or yellowish white with brown heads. Life history: Pupation occurs in the spring. Adults emerge and deposit eggs in leaves. Larvae feed in May through June. There is one generation a year. Overwintering: Prepupae in silk-lined cells in the topsoil. Egg laying wound damage caused by brownheaded ash sawfly. (36) Damage symptoms: Brownheaded ash sawfly larvae feed Photo: Whitney Cranshaw voraciously, consuming entire leaves. Complete defoliation can occur quickly on heavily infested trees. Monitoring: Look for larvae from early May through June or for damage symptoms such as skeletonization or defoliation, particularly on terminal leaves. Physical control: Manually remove larvae and colonies. Chemical control: As sawflies often feed in groups, all chemicals should be directed to the areas on which they are feeding only and need not necessarily cover the entire tree. Biological control: No reports of natural enemies Plant mortality risk: Low Biorational pesticides: azadirachtin, horticultural oil, insecticidal soap, spinosad, pyrethrins Shothole damage caused by young brownheaded ash sawfly larvae. Larger larvae feed on leaf margins. (35) Conventional pesticides: acephate, bifenthrin, carbaryl, Photo: Whitney Cranshaw chlorpyrifos (nursery only), cyfluthrin, deltamethrin, fluvalinate, imidacloprid, lambda-cyhalothrin, malathion, permethrin Defoliation caused by brownheaded ash sawfly larvae feeding on green ash leaf. (33) Photo: James Solomon, USDA Forest Service, The Bugwood Network, University of Georgia. IPM of Midwest Landscapes 83 Pests of Trees and Shrubs Brownheaded ash sawfly (continued) Brownheaded ash sawfly adult. (37) Photo: Whitney Cranshaw Brownheaded ash sawfly larva. (38) Photo: Whitney Cranshaw IPM of Midwest Landscapes 84.

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(Hymenoptera, Tenthredinidae) – a New Pest Species of Ash Tree in the Republic of Moldova
Muzeul Olteniei Craiova. Oltenia. Studii şi comunicări. Ştiinţele Naturii. Tom. 36, No. 1/2020 ISSN 1454-6914 Tomostethus nigritus F. (HYMENOPTERA, TENTHREDINIDAE) – A NEW PEST SPECIES OF ASH TREE IN THE REPUBLIC OF MOLDOVA MOCREAC Nadejda Abstract. In the Republic of Moldova, the ash tree is a common forest species, used in the reforestation and afforestation of woods and territories, and widely used as an ornamental tree in cities and along roads. For more than ten years, our ash tree woods have been severely defoliated by the ash weevil Stereonychusfraxini (De Geer, 1775) from Curculionidae family. In the vegetation period of 2018 and 2019, defoliation was seen on ash trees, caused by unknown sawfly larvae species from the Tenthredinidae family. The analyses showed that these pests belong to the Hymenoptera order – the privet sawfly – Macrophya punctumalbum (Linnaeus, 1767), and Tomostethus nigritus (Fabricius, 1804), the last one being a new species for the fauna of the Republic of Moldova. The biggest ash defoliations caused by the Tomostethus nigritus larvae were recorded in the centre of the country, especially in the Nisporeni and Tighina Forest Enterprises and in the “Plaiul Fagului” Scientific Reserve, as well as in the urban space. Keywords: Ash Black sawfly, Tenthredinidae, ash tree, outbreaks, defoliations, Republic of Moldova. Rezumat. Tomostethus nigritus F. (Hymenoptera, Tenthredinidae) – specie nouă de dăunător al frasinului în Republica Moldova. În Republica Moldova, frasinul este o specie obișnuită, folosită nu numai în reîmpădurire și împădurire dar utilizat pe scară largă ca arbore ornamental în parcurile din orașe și de-a lungul drumurilor. Mai bine de zece ani, pădurile de frasin sunt defoliate anual de către trombarul frunzelor de frasin Stereonychus fraxini (De Geer, 1775) din familia Curculionidae.
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663 NOMINA INSECTA NEARCTICA russata Townes Lissonota (Ichneumonidae) Lissonota sabax Kieffer Plastogryon (Scelionidae) Gryon misellum russatus Bohart Odynerus (Vespidae) Leucodynerus sabeana Buckley Myrmica (Formicidae) Solenopsis xyloni russatus Cresson Ichneumon (Ichneumonidae) Cratichneumon sabina Gittins Mimesa (Sphecidae) Mimesa russellensis Roberts Sapyga (Sapygidae) Sapyga angustata sabinasae Scullen Eucerceris (Sphecidae) Eucerceris lacunosa russelli Burks Brachymeria (Chalcididae) Brachymeria sabinensis Cockerell Melissodes (Anthophoridae) Svastra russelli Crawford Physothorax (Torymidae) Physothorax sabinensis Mitchell Megachile (Megachilidae) Megachile russelli Crawford Thripoctenus (Eulophidae) Ceranisus sabino Schuster Sphaeropthalma (Mutillidae) Sphaeropthalma russeola Mickel Pseudomethoca (Mutillidae) Pseudomethoca sabroskyi Fischer Opius (Braconidae) Opius russeolus Krombein Gorytes (Sphecidae) Gorytes dorothyae sabulosus Dasch Mesochorus (Ichneumonidae) Mesochorus russeus Townes Exochus (Ichneumonidae) Exochus sabulus Sanborne Sinophorus (Ichneumonidae) Sinophorus russeus Townes Gateruption [sic] (Gasteruptiidae) Gasteruption sacatona Caldwell Pseudomethoca (Mutillidae) Pseudomethoca kirbii propinqua russeus Townes Hemiteles (Ichneumonidae) Hemiteles subglaber saccata Viereck Andrena (Andrenidae) Andrena russipes Bohart Odynerus (Vespidae) Cephalodynerus sacchari Myers Microdus (Braconidae) Alabagrus stigma russulus Bohart Dienoplus (Sphecidae) Dienoplus saccharicola Gahan Blepyrus (Encyrtidae) Blepyrus russulus Bohart
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