Sublethal Effects of Baculovirus in the Cabbage Moth, Mamestra brassicae

1995 ◽  
Vol 5 (3) ◽  
pp. 361-367 ◽  
Author(s):  
D. Goulson ◽  
J.S. Gory
2014 ◽  
Vol 66 (2) ◽  
pp. 867-876 ◽  
Author(s):  
Tanja Bohinc ◽  
M. Devetak ◽  
S. Trdan

In 2011, we studied the glucosinolate content in 5 cultivars and 5 cabbage hybrids grown outdoors in order to study their influence on the feeding of cabbage moth caterpillars (Mamestra brassicae). The selected genotypes were categorized into three groups, early (the growth period from 55 to 70 days), mid-early (80-90 days) and mid-late (110-140 days), while the samples of cabbage for glucosinolate analysis were taken at five intervals, during which we also assessed genotypes for the extent of damage caused by caterpillars. We found that the feeding of caterpillars affected primarily the mid-early and mid-late genotypes of cabbage, and that the glucosinolate content among the different cabbage genotypes varies. The highest content of the analyzed glucosinolates was established in mid-late genotypes. Glucobrassicin was the only glucosinolate found in all cabbage genotypes, yet its antixenotic effect (r=0.20) was very low. We found that sinalbin negatively affects the feeding of cabbage moth caterpillars in mid-early cabbage genotypes (r=-0.34), while the same effect of sinigrin on the extent of damage can be observed in mid-late genotypes (r=-0.27). We have established a strong or moderate correlation between the gluconapin (r=0.87) and progoitrin (r=0.66) contents in mid-late genotypes and the extent of damage caused by caterpillars. Our research proves that different cabbage genotypes are responsible for different susceptibilities to damage by the cabbage moth, and that one of the factors of natural resistance of cabbage are also glucosinolates. Despite this, due to their variability in cabbage we cannot precisely determine the set of genotypes that would ensure a higher cabbage yield as a result of less damage caused by the cabbage moth. Thus, we need to identify in more detail the reasons for the time and quantum variability of glucosinolates in Brassicaceae.


1978 ◽  
Vol 24 ◽  
pp. 112-114
Author(s):  
Saburo FUKAMACHI ◽  
Hidemi KAMIWADA

Oecologia ◽  
1988 ◽  
Vol 76 (1) ◽  
pp. 89-96 ◽  
Author(s):  
Klaus Peter Sauer ◽  
Cornelia Grüner

Agriculture ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 388
Author(s):  
Anna Mazurkiewicz ◽  
Dorota Tumialis ◽  
Magdalena Jakubowska

The largest group of cabbage plant pests are the species in the owlet moth family (Lepidoptera: Noctuidae), the most dangerous species of which is the cabbage moth (Mamestra brassicae L.). In cases of heavy infestation by this insect, the surface of plants may be reduced to 30%, with a main yield loss of 10–15%. The aim of the present study was to assess the susceptibility of M. brassicae larvae to nine native nematode isolates of the species Steinernema feltiae (Filipjev) and Heterorhabditis megidis Poinar, Jackson and Klein under laboratory conditions. The most pathogenic strains were S. feltiae K11, S. feltiae K13, S. feltiae ZAG11, and S. feltiae ZWO21, which resulted in 100% mortality at a temperature of 22 °C and a dosage of 100 infective juveniles (IJs)/larva. The least effective was H. megidis Wispowo, which did not exceed 35% mortality under any experimental condition. For most strains, there were significant differences (p ≤ 0.05) in the mortality for dosages between 25 IJs and 50 IJs, and between 25 IJs and 100 IJs, at a temperature of 22 °C. Statistical analysis of the effect of temperature on mortality showed that only strain H. megidis Wipsowo exhibited significant differences (p ≤ 0.05) when applied at dosages of 50 IJs and 100 IJs.


2017 ◽  
Vol 141 ◽  
pp. 76-83 ◽  
Author(s):  
Xia Zhou ◽  
Xing Fan ◽  
Yanling Gao ◽  
Jing Yang ◽  
Jin Qian ◽  
...  

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