scholarly journals Energy reserves in Brevicoryne brassicae (Lin.) (Homoptera: Aphididae) instars and their effect on predation and longevity of three coccinellid species under laboratory conditions

2020 ◽  
Vol 30 (1) ◽  
Author(s):  
Salama Ibrahim Askar ◽  
Monir Mohamed El Husseini
Keyword(s):  
Larval Stage ◽  
Average Rate ◽  
Coccinella Septempunctata ◽  
Brevicoryne Brassicae ◽  
Energy Reserve ◽  
Main Body ◽  
Nymphal Instar ◽  
Cabbage Aphid ◽  
Control Programs ◽  
Biological Performance

Abstract Background Contents of carbohydrates, protein, and lipids in tissues of insect prey constitute the required energy reserve utilized by their predators. Their amounts define the preference of the predator to certain prey on which its biological performance is the optimum. Feeding preferences and longevity of the 3 coccinellid beetles; Coccinella septempunctata L., C. undecimpunctata L., and Scymnus interruptus L. were studied in relation to energy reserve in tissues of the cabbage aphid, Brevicoryne brassicae (Lin.). Main body The level of energy reserve increased with increasing of aphid nymphal instars showing the highest in 4th instar (0.10844 cal/mg). Lipids and carbohydrates represented the highest energy reserve average rate in B. brassicae adults (0.29139 and 0.07404 cal/mg), respectively. C. septempunctata larval stage recorded the highest efficiency in daily predation (89.42 prey), when fed on 1st instar nymphs of the aphid. It required 21 days when fed on the 3rd nymphal instar of B. brassicae. S. interruptus larval stage reflected the lowest consumption and longevity in predation where it consumed less than 69.25 prey/day and lasted a period less than 17.5 days. Generation time for C. undecimpunctata lasted the longest (20.89 days) when fed on B. brassicae 1st nymphal instar. It was decreased in S. interruptus recording (12.22 days) when fed on B. brassicae 3rd nymphal instar. Conclusion Only C. septempunctata was efficient in predation and its biological performance was the best compared to the other tested coccinellid species. Use of C. septempunctata can be recommended when applying biological control programs in the field against the cabbage aphid.

scholarly journals Evaluation of the functional response of Chrysoperla carnea (Stephens) (Neuroptera:Chrysopidae) larvae feeding on cabbage aphid, Brevicoryne brassicae (L.)(Homoptera: Aphididae) in laboratory

2012 ◽  
Vol 9 (2) ◽  
pp. 220-228
Author(s):  
Baghdad Science Journal
Keyword(s):  
Functional Response ◽  
Attack Rate ◽  
Handling Time ◽  
Brevicoryne Brassicae ◽  
Chrysoperla Carnea ◽  
Nymphal Instar ◽  
Predator Satiation ◽  
Cabbage Aphid ◽  
The Stability ◽  
Type Ii Functional Response

This study evaluated the functional response of the larva of the predator Chrysoperla carnea by offering varying densities of cabbage aphid, Brevicoryne brassicae (L.) . Results showed conformity with type–II functional response, where the number of prey killed approaches asymptote hyperbolically as prey density increases (declining proportion of prey killed or the inverse density dependent) till it reached the stability stage determined by handling time and predator satiation. Also, the values of attack rate and handling time changed with age progress for both predator and prey. It has been observed an increase in the attack rate and reduction in handling time with the progress of the predator age when feeding on a particular nymphal instar. The attack rates of the predator was 1.779,3.406 and 4.219 ,while handling time was 0.015,0.010 and 0.008 (days) for 1st,2nd,3rd larval instars respectively, when fed on 1st nymphal instar. Also attack rates decreased and increases handling time with the progress in the prey. The attack rates were 1.779, 1.392, 1.096 and 1.059, due to an increase in size of the predator and in the growing efficiency in hunting the prey as well as in the increase in size of the prey and in developing its ability to defend itself and escape.

scholarly journals Natural Entomophages of Brevicoryne Brassicae (L.) (Hemiptera: Aphididae) in Uzbekistan

2019 ◽  
Vol 11 (4) ◽  
pp. 42
Author(s):  
Kahramon B. Razzakov ◽  
Ikram. I. Abdullaev ◽  
Ko’pal O. Saparboev ◽  
Mavluda M. Allaberganova
Keyword(s):  
Coccinella Septempunctata ◽  
Early Spring ◽  
Brevicoryne Brassicae ◽  
Episyrphus Balteatus ◽  
Cabbage Aphid ◽  
Reproductive Ability ◽  
Chrysopa Carnea ◽  
Biological Effectiveness ◽  
Cabbage Aphids ◽  
Phenological Phases

In our studies phenological phases of cabbage aphids Brevicoryne brassicae (L.) were studied. The influence of external factors (humidity and temperature) was studied under laboratory conditions. The maximum reproductive ability of cabbage aphids was noted in spring and autumn. Some of the parthenogenetic aphids gave about 82 larvae. The daily reproductive ability of aphids was 3-5, and the maximum 5-11. When studying the reproductive ability of parthenogenetic aphids, this indicator was slightly lower than that of the wingless aphids (average 28, maximum 51). The overall development of cabbage aphid seeds averaged 7–9 days in summer and 12–21 days in early spring and autumn. The importance and bioecological features of Metamorphus corollae (F.), Episyrphus balteatus (De Geer, 1776), Syrphus vitripennis (Meigen, 1822), Scaeva pyrastri (L.) Coccinella septempunctata (L.) and Adonia variegata (G.), Chrysopa carnea Steph. with natural control of the cabbage aphid were studied. Studying the biological effectiveness of a simple golden-eyed fly in relation to the cabbage bug, efficiencies were observed at a ratio of II-year-old larvae of simple golden-eyed and cabbage bug in a ratio of 1:5 and 1:10. For 4 day old gold-eyed eggs, this efficiency was observed when the ratio with cabbage bug was 1:1 on the 17th day of the experiment.

Incidence of the cabbage aphid, Brevicoryne brassicae L. in potato crops in India and its efficiency for transmission of potato virus Yo

2021 ◽  
Author(s):  
Jandrajupalli Sridhar ◽  
Vallepu Venkateswarlu ◽  
Mohd Abas Shah ◽  
Neelam Kumari ◽  
Anuj Bhatnagar ◽  
...  
Keyword(s):  
Potato Virus ◽  
Brevicoryne Brassicae ◽  
Cabbage Aphid ◽  
Potato Crops

scholarly journals In-field screening for host plant resistance to Delia radicum and Brevicoryne brassicae within selected rapeseed cultivars and new interspecific hybrids

2020 ◽  
Vol 15 (1) ◽  
pp. 711-720
Author(s):  
Janetta Niemann ◽  
Justyna Szwarc ◽  
Jan Bocianowski ◽  
Dorota Weigt ◽  
Marek Mrówczyński
Keyword(s):  
Life Sciences ◽  
Field Trials ◽  
Brevicoryne Brassicae ◽  
Delia Radicum ◽  
Sources Of Resistance ◽  
Cabbage Aphid ◽  
Hybrid Combination ◽  
Resistance To Insects ◽  
Wide Range ◽  
High Level

AbstractRapeseed (Brassica napus) can be attacked by a wide range of pests, for example, cabbage root fly (Delia radicum) and cabbage aphid (Brevicoryne brassicae). One of the best methods of pest management is breeding for insect resistance in rapeseed. Wild genotypes of Brassicaceae and rapeseed cultivars can be used as a source of resistance. In 2017, 2018, and 2019, field trials were performed to assess the level of resistance to D. radicum and B. brassicae within 53 registered rapeseed cultivars and 31 interspecific hybrid combinations originating from the resources of the Department of Genetics and Plant Breeding of Poznań University of Life Sciences (PULS). The level of resistance varied among genotypes and years. Only one hybrid combination and two B. napus cultivars maintained high level of resistance in all tested years, i.e., B. napus cv. Jet Neuf × B. carinata – PI 649096, Galileus, and Markolo. The results of this research indicate that resistance to insects is present in Brassicaceae family and can be transferred to rapeseed cultivars. The importance of continuous improvement of rapeseed pest resistance and the search for new sources of resistance is discussed; furthermore, plans for future investigations are presented.

scholarly journals Entomopathogenic fungus, Lecanicillium lecanii R. Z are & W. Gams anchored into MCM-41: A new and effective bio-insecticide against Brevicoryne brassicae (Linnaeus, 1758) (Hom: Aphididae) to protect cabbages

2019 ◽  
Vol 114 (1) ◽  
pp. 97
Author(s):  
Asmar SOLEYMANZADE ◽  
Fereshteh KHORRAMI ◽  
Hana BATMANI ◽  
Khadijeh OJAGHI AGHBASH ◽  
Youbert GHOSTA
Keyword(s):  
Entomopathogenic Fungus ◽  
Cost Effective ◽  
Brevicoryne Brassicae ◽  
Vegetable Crops ◽  
Cabbage Aphid ◽  
Lecanicillium Lecanii ◽  
Insecticidal Efficacy ◽  
Potential Strategy ◽  
Nano Formulation ◽  
Mcm 41

<p class="Default"><em>Brevicoryne brassicae</em> is a significant pest of cultivated cabbages and vegetable crops in the world. The present study was carried out to examine a potential strategy to enhance the insecticidal activity of <em>Lecanicillium lecanii</em> for cost-effective management of <em>B. brassicae</em>. The insecticidal efficacy of pure entomopathogenic fungus (PEF) and MCM-41 (Mobil Composition of Matter)<em> L. lecanii</em> were assessed against the cabbage aphid under laboratory and greenhouse conditions. The fungus was supported on MCM-41 and was completely characterized by Scanning Electron Microscope (SEM), thermogravimetric analysis (TGA) and Fourier transform infrared (FT-IR) techniques. LC50 values of PEF and MCM-41@fungus were 1.9×106 and 2.5×104 and 2.0×107 and 2.0×105 conidia/ml on adults of <em>B. brassicae</em> under laboratory and greenhouse conditions, respectively. Bioassays demonstrated that MCM-41@fungus significantly decreased LC50 values of entomopathogenic fungus and it was more toxic than <em>L. lecanii</em> at adult stage of the pest. The results showed that pure <em>L. lecanii</em> and its nano-formulation could play key roles as bio-pesticides in <em>B. brassicae</em> management programs.</p>

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