The spatio-temporal distribution of adult Ceutorhynchus assimilis in a crop of winter oilseed rape in relation to the distribution of their larvae and that of the parasitoid Trichomalus perfectus

2000 ◽  
Vol 95 (2) ◽  
pp. 161-171 ◽  
Author(s):  
A.W. Ferguson ◽  
Z. Klukowski ◽  
B. Walczak ◽  
J.N. Perry ◽  
M.A. Mugglestone ◽  
...  
Keyword(s):  
Oilseed Rape ◽  
Temporal Distribution ◽  
Winter Oilseed Rape ◽  
Ceutorhynchus Assimilis ◽  
Spatio Temporal

scholarly journals Biology and harmfulness of Brassica pod midge (Dasineura brassicae Winn.) in winter oilseed rape

2015 ◽  
Vol 30 (2) ◽  
pp. 85-90
Author(s):  
Draga Graora ◽  
Ivan Sivcev ◽  
Lazar Sivcev ◽  
Wolfgang Bьchs ◽  
Vladimir Tomic ◽  
...  
Keyword(s):  
Oilseed Rape ◽  
First Generation ◽  
Yield Reduction ◽  
Winter Oilseed Rape ◽  
Ceutorhynchus Assimilis ◽  
Cabbage Seed Weevil ◽  
Two Generations ◽  
Important Pest ◽  
Cabbage Seed ◽  
Dasineura Brassicae

The Brassica pod midge (Dasineura brassicae Winn.) is an important pest in oilseed rape (Brasica napus L.). It develops two generations per year and overwinters in the larval stage in cocoons in soil. Immigration of the first generation adults lasted from the beginning of April until the end of May. Larvae developed in pods from mid-April to mid-June, causing pod deformation and cracking, which resulted in premature falling out of seeds and yield reduction. Pod damage amounted to 11.6%. The emergence of the second generation adults was detected at the end of May and in the first ten days of June. D. brassicae was found to lay eggs in healthy pods and no correlation was found with the cabbage seed weevil, Ceutorhynchus assimilis Paykull.

scholarly journals Spatio-temporal Distributions and Associations of Cabbage Stem Weevil (Ceutorhynchus Pallidactylus Marsham, 1802) and Pollen Beetle (Brassicogethes Aeneus Fabricius, 1775) in winter oilseed rape

2017 ◽  
Vol 65 (3) ◽  
pp. 839-847
Author(s):  
Vojtěch Hlavjenka ◽  
Marek Seidenglanz ◽  
Jaroslav Šafář
Keyword(s):  
Oilseed Rape ◽  
Cumulative Distribution ◽  
Winter Oilseed Rape ◽  
High Tendency ◽  
Pollen Beetle ◽  
Brassicogethes Aeneus ◽  
Males And Females ◽  
Spatio Temporal ◽  
The Individual ◽  
Ceutorhynchus Pallidactylus

From 2013 to 2015 the within-field spatio-temporal distributions and interactions between Ceutorhynchus pallidactylus and Brassicogethes aeneus in winter oilseed rape crops were assessed using SADIE analysis (Spatial Analysis by Distance IndicEs) and Quick association analysis. A significant tendency for aggregation was recorded in C. pallidactylus males in the crop in both 2013 and 2015. Females showed a high tendency towards aggregation only in 2013. Both sexes were significantly associated in crops in 2013 and 2015. B. aeneus adults showed a high tendency towards aggregation in all three years. From the three seasons the cumulative distributions (based on the sums of insect catches in traps for the individual dates) of males and females of C. pallidactylus were significantly associated with the cumulative distribution of B. aeneus adults only in 2013. Contrary to this, an almost significant dissociation between cumulative distributions of C. pallidactylus males and B. aeneus adults was recorded in 2014.

scholarly journals Key pests and their parasitoids on spring and winter oilseed rape in Estonia

2006 ◽  
Vol 17 (4) ◽  
Author(s):  
Eve Veromann ◽  
Anne Luik ◽  
Luule Metspalu ◽  
Ingrid Williams
Keyword(s):  
Oilseed Rape ◽  
Meligethes Aeneus ◽  
Winter Oilseed Rape ◽  
Ceutorhynchus Assimilis ◽  
Tersilochus Heterocerus ◽  
Phradis Morionellus

The pests and their hymenopterous parasitoids present in a spring and a winter oilseed rape crop in Estoniawere studied. Meligethes aeneus was themost abundant pest in both crops. Other crucifer-specialist pests included: Ceutorhynchus assimilis, C. pallidactylus, C. rapae, C. floralis, C. pleurostigma and Phyllotreta spp., but their abundance was low. Four species of parasitoids of M. aeneus larvae (Diospilus capito, Phradis morionellus, P. interstitialis and Tersilochus heterocerus) and threeof C. assimilis larvae (Mesopolobus morys, Stenomalina gracilis and Trichomalus perfectus) were also found.

Influence of Planting Density on Root Spatio-Temporal Distribution of Different Types of Maize under High-Yielding Cultivation Conditions

2013 ◽  
Vol 38 (7) ◽  
pp. 1286-1294 ◽  
Author(s):  
Zong-Xin LI ◽  
Yuan-Quan CHEN ◽  
Qing-Cheng WANG ◽  
Kai-Chang LIU ◽  
Wang-Sheng GAO ◽  
...  
Keyword(s):  
Temporal Distribution ◽  
Planting Density ◽  
Cultivation Conditions ◽  
Different Types ◽  
Spatio Temporal
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