Analysis of oilseed rape stem weevil chemical control using a damage rating scale

Milovac, Željko; Zorić, Miroslav; Franeta, Filip; Terzić, S.; Obradović, Olivera Petrović; Jeromela, Ana Marjanović

doi:10.1002/ps.4568

Cited by 13 publications

(11 citation statements)

References 28 publications

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“…Significant shifts in the pollen beetle's susceptibility to thiacloprid have been reported in Europe (Kaiser et al 2018;Rubil et al 2018). Some studies have also demonstrated the low effects of thiacloprid, Milovac et al (2017), on stem weevils under field conditions. This indicates that neonicotinoids are unsuitable for applications targeting both pollen beetles and stem weevils.…”

Section: Discussionmentioning

confidence: 99%

Control of cabbage stem weevil and pollen beetle with one insecticide application

Seidenglanz¹,

Šafář²,

Rubil³

et al. 2020

Plant Prot. Sci.

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Over the course of three years (2016–2018), the effects of insecticides on stem-mining weevils [(Ceutorhynchus pallidactylus (Marsham, 1802), Ceutorhynchus napi (Gyllenhal, 1837)] were assessed under field conditions. The dates for spraying were determined on the basis of the recorded percentages of weevil females carrying mature eggs in their ovaries (timing I: the first females with mature eggs present in yellow water traps; timing II: more than 50% of the females with mature eggs present). Delaying the first spring insecticide application till timing II made it possible to combine the control of the stem weevil along with the control of the pollen beetle, Brassicogethes aeneus (Fabricius, 1775). However, the poor effectiveness of the tested insecticides on the stem-mining weevils, regardless of the date they were sprayed, indicates it is impossible to successfully control the insect pests with one insecticide application during the seasons with prolonged egg-laying periods.

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Section: Discussionmentioning

confidence: 99%

Control of cabbage stem weevil and pollen beetle with one insecticide application

Seidenglanz¹,

Šafář²,

Rubil³

et al. 2020

Plant Prot. Sci.

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“…Therefore, the use of ineffective or weakly effective insecticides can results in a buildup of stem weevil population density. Timely application of highly efficient insecticides, such chlorpyrifos+cypermethrin and cypermethrin (Milovac et al, 2017) therefore has a strong impact on the abundance of these two OSR stem weevils.…”

Section: Discussionmentioning

confidence: 99%

Phenology and suppression of stem weevils (Ceutorhynchus napi gyllenhal and Ceutorhynchus pallidactylus marsham) in oilseed rape in northern Serbia

Sivčev

Graora

et al. 2018

PESTIC PHYTOMED

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Stem weevils (Ceutorhynchus pallidactylus and Ceutorhynchus napi) are significant pests of oilseed rape that farmers regularly suppress by insecticide treatments intended against Brassicogethes aeneus. Recent studies have shown that in some regions of northern Serbia C. napi is dominant, while C. pallidactylus prevails in others. Increased damage from stem weevils has elicited an exploration of the situation and a study of their phenology and effects of insecticides in three differently managed fields: conventional, organic and integrated. New findings regarding the phenology of stem weevils show that both species were sporadically present in our experimental oilseed rape fields as early as during autumn (from the end of October 2010, BBCH 17-18). The main period of stem weevil settlement is the end of winter and early spring. Maximum flight of both weevil species was recorded on March 23 at the beginning of oilseed rape (OSR) stem elongation (BBCH 22-25), and one week later in the organic field. There were no significant differences in the number of settled weevils among the three differently managed fields. The insecticide treatment against C. napi was applied two weeks earlier than the usual treatment against B. aeneus and C. pallidactylus. Thus, it is clear that insecticide treatment directed against B. aeneus and C. pallidactylus is not effective against C. napi. In this way, such a practice can contribute to an increase in OSR damage, and density of the next generation of C. napi. A new generation of C. pallidactylus emerged from OSR fields in June 2011, while the majority of C. napi emerged in March of the following year.

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“…Damage by insect pests is a significant yield reducing factor in oilseed rape production, with an average annual yield loss of 13% on a global scale and 15% annual yield loss on a European scale (Cramer, 1967;Milovac et al, 2017). Due to their high mobility, most insect pests are not restricted to the infested field but can disperse and migrate over long distances, not only invading adjacent fields but more likely spreading on a landscape level ( Table 7).…”

Section: Important Pests Of Oilseed Rapementioning

confidence: 99%

A Global Survey on Diseases and Pests in Oilseed Rape—Current Challenges and Innovative Strategies of Control

et al. 2020

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The introduction of high-yielding and hybrid cultivars and the opening of new markets in the food and feed sector have steadily increased rapeseed production since the 1980s in the main production regions, Canada, Europe, China, India, and Australia. Since the 1990s, however, the average growth rate of yields has declined in Europe and Australia, which has been associated with a less effective control of biotic stresses. A global survey including the knowledge of 22 experts from 10 countries revealed a total of 16 diseases, 37 insect pests, several species of nematodes, and slugs currently affecting rapeseed production globally. A ranking of the top 10 most important biotic stresses in the four global regions where Brassica napus is grown (Canada, China, Europe, Australia) indicated an increase in several important stresses and distinct regional differences in the priority of prevailing diseases and pests. A stronger overlap exists among diseases, with Sclerotinia stem rot, Phoma stem canker, and clubroot occurring in all the four global regions on the top 10 list, while the range of prevailing insect pests was more diverse among the regions, with no top 10 insect playing an equally important role worldwide. Management options are substantially broader in disease than in pest control, making the latter the larger challenge. Since common integrated pest management (IPM) tools such as crop rotation, soil management, resistant cultivars or biocontrol are ineffective or not available, insect control largely relies on insecticides. Increasing restrictions on insecticide use, particularly in Europe, and losses in insecticide efficacy threaten the profitability of oilseed rape production and its role as an important break crop in cereal dominated cropping systems. Since the survival time of insects in the absence of their main host is relatively short (<1 year), a regional synchronization of cropping schemes resulting in one or more years without the crop could lead to a substantial disruption of regional insect populations. If rotation schemes were implemented on the landscape instead the farm level, by coordination among growers in zones covering the range distances of insect pests, an efficient and chemical low management strategy could be established and enable a more sustainable rapeseed production in the future.

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Analysis of oilseed rape stem weevil chemical control using a damage rating scale

Abstract: This study showed that a combined efficacy evaluation expressed through both damage rating scale and the count of larvae, supported by an ordinal regression model for data analysis, is indispensable for obtaining accurate results. © 2017 Society of Chemical Industry.

Cited by 13 publications

References 28 publications

Control of cabbage stem weevil and pollen beetle with one insecticide application

Control of cabbage stem weevil and pollen beetle with one insecticide application

Phenology and suppression of stem weevils (Ceutorhynchus napi gyllenhal and Ceutorhynchus pallidactylus marsham) in oilseed rape in northern Serbia

A Global Survey on Diseases and Pests in Oilseed Rape—Current Challenges and Innovative Strategies of Control

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