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Egg Development and Toxicity of Insecticides to Eggs, Neonate Larvae and Adults of Xylotrechus Arvicola, a Pest in Iberian Grapevines

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Egg Development and Toxicity of Insecticides to Eggs, Neonate Larvae and Adults of Xylotrechus Arvicola, a Pest in Iberian Grapevines Vitis 55, 83–93 (2016) DOI: 10.5073/vitis.2016.55.83-93 Egg development and toxicity of insecticides to eggs, neonate larvae and adults of Xylotrechus arvicola, a pest in Iberian grapevines A. RODRÍGUEZ-GONZÁLEZ1), H. J. PELÁEZ2), S. MAYO1), O. GONZÁLEZ-LÓPEZ1) and P. A. CASQUERO1) 1) Instituto de Medio Ambiente, Recursos Naturales y Biodiversidad, Departamento de Ingeniería y Ciencias Agrarias, Universidad de León, León, Spain 2) Freelance, Valladolid, Spain Summary and Del TÍO 1996, OCETE and LÓPEZ 1999), Navarra (OCETE et al. 2002), Castilla-La Mancha (RODRÍGUEZ and OcaÑA Xylotrechus arvicola (Coleoptera: Cerambycidae) is 1997), and Castilla y León (OCETE and LÓPEZ 1999, PELÁEZ a xylophagous species that is becoming an important pest et al. 2001, MORENO et al. 2004). GARCÍA RUIZ et al. (2012) in vineyards in the Iberian Peninsula. The most sensitive described that the action of the larvae, associated with the stages are adult and egg, but their neonate larvae can also spread of wood fungi, causes a direct damage (the larvae dig be attacked during the first 24 h after hatching and be- galleries that diminish the plant’s capacity to transport sap fore entering the wood. Adults were evaluated for seven by reducing the vascular area, resulting in smaller berries, days against the insecticides spinosad, Beauveria bassi- which degrades wine quality by incrementing the propor- ana, imidacloprid and chlorpyrifos and neonate larvae tion of berry skin in overall wine composition) and indirect (< 24 h) and eggs of different ages against the described damage (for fungal attack). insecticides, as well as flufenoxuron and pyriproxyfen. All Their most sensitive stages are adult and egg, developed insecticides were applied in a Potter tower at a maximum outside the vine plants which have been attacked. But their and minimum commercial dose, and showed significant neonate larvae can also be attacked during the first 24 h after differences both among insecticides as between the egg hatching has occurred and before they enter the wood. applied doses. Most of the hatching occurs eight days After mating, females of X. arvicola lay the eggs, concen- after oviposition by X. arvicola females. Chlorpyrifos trated in cracks or under the rhytidome in the vine wood. had a quick and total control of eggs of different ages, The fecundity and viability of eggs are extended over a long neonate larvae and adults in both dosis applied, but period (RODRÍGUEZ-GONZÁLEZ et al. 2016a). The location of its effectiveness could cause serious effects on other the eggs enables the emerging larvae to get into the wood non-target species. Pyriproxifen and flufenoxuron had without any difficulty, making galleries inside the plant. the best ovicidal control when the age of eggs increases The eggs are usually protected by the rhytidome or crack. and, B. bassiana also had a good ovicidal control, due The larvae, once inserted in the wood, are inaccessible to its capacity to invade the eggs actively through their chemical compounds. Another problem is the treatment on shell and proliferate inside them. Biological insecticides X. arvicola adults, because it has a pattern of emergency such as B. bassiana and spinosad, with a total control which is very staggered in time (GARCÍA-RUIZ 2009). SORIA on adults and good rates of mortality of neonate larvae et al. (2013) described the emergency period between late and eggs can be a great instrument to biological control June and mid-July in vineyards of La Rioja and can be of this pest. extended until mid-August, MORENO (2005) described this period from March until the end of July in vineyards of Key words: Xylotrechus arvicola; eggs; neonate larvae; Valladolid (Castilla y Leon) and BIURRUN et al. (2007) in adults; Potter tower; toxic effect. Navarre described the emergency period between 14 May and 26 August in plantations of Prunus spinosa L. An integrated approach against this pest via adaptation Introduction of cultural techniques would to be remove the rhytidome (PELÁEZ et al. 2006) and pruning the affected branches Xylotrechus arvicola (Coleoptera: Cerambycidae) is a below the area of galleries (OCETE et al. 2004), but these xylophagous species that is becoming an important pest in cultural measures are not suitable for an indirect control of vineyard, with a great capacity to establish itself in new vine- X. arvicola because it is expensive, and also it is destructive yards (RODRÍGUEZ-GONZÁLEZ 2014), causing the destruction and not sustainable for the cultivation (PELÁEZ et al. 2006). of vines in the main wine-producing regions with Protected Alternative management techniques can be used, such as Denomination of Origin (PDO) of Iberian Peninsula wines, the change in the training system, using training systems such as the vineyards of La Rioja Alta and Alavesa (OCETE with several branches in which, after the pruning of affected Correspondence to: Dr. A. RODRÍGUEZ-GONZÁLEZ, Instituto de Medio Ambiente, Recursos Naturales y Biodiversidad. Departamento de Ingeniería y Ciencias Agrarias, Universidad de León. Avenida de Portugal nº 41, 24071, León, Spain. E-mail: [email protected] © The author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution Share-Alike License (http://creative-commons.org/licenses/by-sa/4.0/). 84 A. RODRÍGUEZ-GONZÁLEZ et al. branches, it is easier and quicker to train new branches (bush In the biological control of other Coleoptera described wine training system). However, in vines conducted by trellis as pests, entomopathogenic fungi, such as Beauveria bas- (as for example bilateral cordon training system with only siana, have been able to infect and kill all stages of the two productive branches), if a branch is destroyed by a high coffee borers Xylotrechus quadripes Chevrolat (Coleoptera: level of X. arvicola attack, a longer period is needed to train a Cerambycidae), Acalolepta cervinus Hope (Coleoptera: Cer- new branch, which decreases the vine production during this ambycidae) (JIA-NING and RONG-PING 2002) or the red oak period. RODRÍGUEZ-GONZÁLEZ et al. (2016b) concluded that borer Enaphalodes rufulus (Coleoptera: Cerambycidae) eggs the renovation of attacked branches in vines is easier, with (MEYERS et al. 2013). B. bassiana also has controlled the the bush vines training system, than in vines with bilateral larvae and adults of Anoplophora glabripennis (Coleoptera: cordon training systems. Cerambycidae) (MITSUAKI et al. 2002), Saperda populnea Biological control techniques can be interesting, al- (L.) (Coleoptera: Cerambycidae) (EKEN et al. 2006). Insec- though the knowledge of X. arvicola natural enemies is still ticides from natural derivatives such as spinosad have been very low. Xylotrechus gender is parasitized by species of used effectively in adult control of Rhyzopertha dominica the Ichneumonidae family (GEORGIEV and KOLAROV 1999, L. (Coleoptera: Bostrychidae) (ATHANASSIOU et al. 2011), REAGEL et al. 2012). Specifically, VIVES-NOGUEra et al. Hypocryphalus mangiferae Stebbing (Coleoptera: Scoly- (2000) described that their larvae can be parasitized by the tidae) (SAEED et al. 2011), Sitophilus granarius (Coleop- ichneumonids Xorides filiformis Gravenhorst 1829 (Hyme- tera: Curculionidae), Cryptolestes ferrugineus Stephens noptera: Ichneumonidae), Xorides rufipes Gravenhorst 1829 (Coleoptera: Laemophloeidae) (ATHANASSIOU et al. 2011) (Hymenoptera: Ichneumonidae) and the braconid Doryctes and the fruit fly Ceratitis capitata (Diptera: Tephritidae) leucogaster 1834 Nees (Hymenoptera: Braconidae) in forest eggs (ADÁN et al. 1996). Inhibitors of embryogenesis such as ecosystems, although its low density suggests that they do pyriproxyfen have demonstrated lethal effects on larvae and not play an important role in their biological control (GEOR- sublethal front adult effects of Cryptolaemus montrouzieri GIEV and KOLAROV 1999; GARCÍA-RUIZ 2007). In X. arvicola Mulsant (Coleoptera: Coccinellidae) (PLANES et al. 2013) and eggs the entomopathogenic fungus Beauveria bassiana has in Callosobruchus maculatus Fabricius 1775 (Coleoptera: been detected (GARCÍA and SANCHEZ 2002). Bruchidae) eggs (ABO-ELGHAR et al. 2003). To control X. arvicola, it is a priority to choose com- In the chemical control of other beetles described as pounds with a different mode of action, with greater selec- pests, insecticides such as imidacloprid have been used, tivity and less resistance, so as to minimize side effects on which has proven useful in the embryonic control of insect predators described by PELÁEZ et al. (2012) or parasitoids pests of the order Homoptera, Coleoptera, Lepidoptera, Dip- described by GEORGIEV and KOLAROV (1999), REAGEL et al. tera, Hemiptera and Hymenoptera (BOSTANIAN et al. 2010). (2012) and VIVES-NOGUERA (2000) improving the environ- Imidacloprid also has shown toxicity against Plectrodera mental cost/benefit ratio of insecticide treatment. Specific scalator (F.) (Coleoptera: Cerambycidae) and Anoplopho- compounds to control pests with a low eventual side effect ra glabripennis Motschulsky (Coleoptera: Cerambycidae) in natural enemies would be entomopathogenic fungi as larvae (POLAND et al. 2006), and against Acalolepta vastator Beauveria bassiana and Metarhizium anisopliae, insurances (Coleoptera: Cerambycidae) (GOODWIN 2005), Hypocryph- against no object organisms and beneficial insects (BRINK- alus mangiferae Stebbing (Coleoptera: Scolytidae) (SAEED MAN and FULLER 1999, COTTRELL and SHAPIRO-ILAN 2003, et al. 2011) and Anoplophora glabripennis Motschulsky
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