Article
Forestry
Yayuan Chen, Helena Bylund, Christer Bjorkman, Frauke Fedderwitz, Adriana Puentes
Summary: The use of the plant hormone methyl jasmonate can induce defense in conifer seedlings against pine weevil damage. Timing and recurrence of methyl jasmonate treatment have varying effects on weevil damage, but applying it before winter storage provides the most effective protection. This method is compatible with plant nursery practices and can provide adequate protection for two growing seasons.
Article
Forestry
Line Nybakken, Inger Sundheim Floistad, Melissa Mageroy, Maren Lomsdal, Solveig Stralberg, Paal Krokene, Johan Asplund
Summary: Naturally regenerated Norway spruce plants were found to have stronger chemical defenses compared to nursery-grown plants, with higher concentrations of phenolic compounds and lower concentrations of terpenes. However, treatments such as wounding or MeJA did not significantly affect whether plants were attacked by pine weevils. Further research is needed to understand the importance of plant age, stress level, genetic origin, and resource availability for the chemical defense mechanisms of young Norway spruce plants.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Plant Sciences
Paal Krokene, Ketil Kohmann, Ngan Bao Huynh, Melissa H. Mageroy
Summary: The large pine weevil is a major pest in commercial forestry and traditional pesticide application is being phased out. This study explored alternative plant protection strategies and found that applying methyl jasmonate on 2-year-old Norway spruce plants can significantly enhance inducible defenses and inhibit sapwood growth. The effect of methyl jasmonate was stronger compared to salicylic acid and oxalic acid.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Entomology
Petr Dolezal, Lenka Kleinova, Marketa Davidkova
Summary: The large pine weevil, Hylobius abietis, shows a preference for Seedlings of Pseudotsuga menziesii as a food source, but low oviposition rates indicate lack of nutrients. Betula pendula is the least preferred food source, causing high mortality among weevils. Different tree species have a significant impact on the fecundity of weevils.
Article
Multidisciplinary Sciences
Juraj Galko, Michal Lalik, Slavomir Rell, Christo Nikolov, Marek Barta, Jan Pittner, Silvia Hyblerova, Milan Zubrik, Andrej Kunca, Jozef Vakula, Andrej Gubka, Jaroslav Holusa
Summary: The large pine weevil is a significant forest pest in Europe, and chemical treatments for its control are being restricted. In this study, researchers compared different protective methods and found that repeated application of alpha-cypermethrin spray was the most effective and cost-efficient. Glue treatment was also effective, but collars were not recommended due to their moderate effectiveness and cost. Wax coating was inexpensive and environmentally safe, but only provided protection for one year.
SCIENTIFIC REPORTS
(2022)
Article
Plant Sciences
Kristina Berggren, Michelle Nordkvist, Christer Bjorkman, Helena Bylund, Maartje J. Klapwijk, Adriana Puentes
Summary: Utilizing plants with enhanced resistance traits is gaining interest in plant protection, and two promising strategies for increasing resistance against a forest insect pest are exogenous application of the plant defense hormone methyl jasmonate (MeJA) and production of plants through somatic embryogenesis (SE). This study quantified and compared the effects of SE and MeJA on Norway spruce resistance to pine weevil damage. The results showed that SE and MeJA independently decreased pine weevil damage to Norway spruce plants, and their combined use resulted in even greater reduction of damage.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Agronomy
Muhammad Usman Rasheed, M. Kivimaenpaa, A. Kasurinen
Summary: The study focused on the rhizosphere BVOC emissions of Scots pine seedlings under changing growth conditions. It found that warming and N addition decreased rhizosphere BVOC emissions, while the effect of bark herbivory varied from increase to decrease. Under altered growth conditions, Scots pine seedlings may reduce carbon investment to rhizosphere BVOCs.
Article
Agronomy
Amelia Tudoran, Goran Nordlander, Anna Karlberg, Adriana Puentes
Summary: The study found that Bacillus thuringiensis had toxic and lethal effects on pine weevils, with the Diptera-targeted strain showing the most negative effects on weight, feeding, and mortality. Other strains specifically targeting Coleoptera had lower effects. There is potential for using Bt as a forest pest management measure against H. abietis, but further evaluation of other Bt strains/toxins is needed.
PEST MANAGEMENT SCIENCE
(2021)
Article
Forestry
Adam Vele
Summary: This study aims to investigate how tree species and stump diameter influence the number, sex, and body size of hatched adults of the large pine weevil. The results showed that tree species significantly affects the number and body mass of beetles, with spruce stumps having fewer but larger beetles.
Article
Entomology
Iwona Skrzecz, Lidia Sukovata, Tomasz Jablonski, Alicja Sowinska, Hanna Szmidla
Summary: This study found that there were significantly more Hylobius abietis beetles in old stands (61-69 years) than in young stands (5-11 years). The distribution of the beetles in both old and young stands was inversely dependent on the distance from the stand edge. The migration of the large pine weevils to the reforestations was most intense in mid-May and early June.
JOURNAL OF PEST SCIENCE
(2021)
Article
Forestry
Egle Koster, Jukka Pumpanen, Marjo Palviainen, Xuan Zhou, Kajar Koster
Summary: Research has shown that biochar amendment can significantly increase nutrient concentrations in growing media, improve the growth rate and aboveground growth of Norway spruce and silver birch seedlings, increase birch root collar diameter, and have no impact on the quality of spruce and pine seedlings.
CANADIAN JOURNAL OF FOREST RESEARCH
(2021)
Article
Forestry
Amelia Tudoran, Helena Bylund, Goran Nordlander, Ion Oltean, Adriana Puentes
Summary: Forest regeneration can be compromised by insect damage to newly-planted conifer seedlings, with the pine weevil being a significant pest in Europe. Strategies for seedling protection include physical barriers, silvicultural measures, and insecticides, while the potential benefits of Associational Effects (AE) have been little explored. Neighbor identity can influence the susceptibility of conifer seedlings to pine weevil damage, but the effects may vary depending on the scale of the study.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Agronomy
Sannakajsa M. Velmala, Matti J. Salmela, Tommy Chan, Teemu Holtta, Leena Hamberg, Risto Sievanen, Taina Pennanen
Summary: This study investigated the soil exploring patterns of Norway spruce seedlings and compared the differences in root growth strategies and response to nutrient patches between fast-growing and slow-growing phenotypes.
Article
Forestry
Martina Hajickova, Roman Plichta, Josef Urban, Daniel Volarik, Roman Gebauer
Summary: Norway spruce seedlings have shown good resilience to spring drought, with physiological parameters starting to recover after rewatering. However, the time required for full recovery from stress may make seedlings more susceptible to recurrent drought events. Growth and physiological functions gradually returned to normal after experiencing drought and undergoing rehydration.
Article
Plant Sciences
Mireia Gomez-Gallego, Lucia Galiano, Jordi Martinez-Vilalta, Jan Stenlid, Hernan D. Capador-Barreto, Malin Elfstrand, J. Julio Camarero, Jonas Oliva
Summary: This study investigated the physiological processes leading to drought-induced mortality in Norway spruce and Scots pine saplings infected with Heterobasidion annosum. The results showed that pathogen infection decreased carbon reserves in spruce, reducing their ability to cope with drought and resulting in increased mortality rates. The study also found that defoliation, relative water content, and starch concentration were predictors of mortality under both drought and pathogen infection.
PLANT CELL AND ENVIRONMENT
(2022)
