scholarly journals Field Screening of Seven Cultivars of Cabbage Against Cabbage Butterfly (Pieris brassicae) and Cabbage Aphids (Brevicoryne brassicae) at Gkuleshor, Baitadi, Nepal

2020 ◽  
Vol 14 (1) ◽  
pp. 63-67
Author(s):  
Narendra Bahadur Singh ◽  
Santosh Dhungana ◽  
Srijana Adhikari ◽  
Dipesh Chapagain ◽  
Nawaraj Ghimire ◽  
...  
Keyword(s):  
Population Density ◽  
Pieris Brassicae ◽  
Brevicoryne Brassicae ◽  
Animal Science ◽  
Field Screening ◽  
Cabbage Aphid ◽  
Cabbage Butterfly ◽  
Science College ◽  
Butterfly Population ◽  
Cabbage Aphids

Field screening of seven cultivars of cabbage namely: Green Crown, Green Top, Green Coronet, Pioneer, Nepa Round, Copenhagen Market and Golden Acre were carried out against cabbage butterfly (Pieris brassicae) and cabbage aphid (Brevicoryne brassicae) at the research farm of entomology section, Gokuleshwor Agriculture and Animal Science College, Baitadi in RCBD design from October 2017 to February 2018. Five plants were tagged randomly after transplanting in field excluding border plants in each plot. Data were collected for the population dynamics of cabbage butterfly larvae and cabbage aphid on weekly basis. None of the seven cultivars were found resistant to cabbage butterfly and cabbage aphid, however their population density varied on tested cultivars. Cabbage butterfly population was recorded the highest on the cultivar Pioneer (22.88 larvae/plant) and the lowest on the cultivar Copenhagen Market (10.06 larvae/plant), and other cultivars were of intermediate types. Similarly, the population density of aphid ranged from 36.70 to 105.58 aphids/leaf. The highest population density of aphid was recorded on cultivar Green Crown (105.58 aphids/leaf) and the lowest on cultivar Copenhagen Market (39.82 aphids/leaf. From the results, Copenhagen Market proved to be the best against both cabbage butterfly and cabbage aphids.

scholarly journals Influence of the Surrounding Plants by Rapeseed Field on Population Density of Cabbage Aphid (Brevicoryne brassicae L.) and its Biological Enemies

2010 ◽  
Vol 7 (1) ◽  
pp. 246-253
Author(s):  
Baghdad Science Journal
Keyword(s):  
Population Density ◽  
Cover Crops ◽  
Brevicoryne Brassicae ◽  
Cabbage Aphid

The result revealed that the peak of population density of cabbage aphid Brevicoryne brassicae was 523.20 individuals/plant on 21 March in edges of rapeseed field and was 1141.67 individuals/plant in center of the field. Results revealed that population density of cabbage aphid in rapeseed fields surrounded by cover crops significantly were low compared with that of monoculture rapeseed. The location of rapeseed plants (in edges or in center) significantly affected (p

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.

REPRODUCTION AND LONGEVITY OF CABBAGE APHID, BREVICORYNE BRASSICAE (HOMOPTERA: APHIDIDAE), PARASITIZED BY DIAERETIELLA RAPAE (HYMENOPTERA: APHIDIIDAE)

1984 ◽  
Vol 116 (12) ◽  
pp. 1605-1610 ◽  
Author(s):  
M. Mackauer ◽  
S. Kambhampati
Keyword(s):  
Adult Stage ◽  
Variable Number ◽  
Reproductive Period ◽  
Brevicoryne Brassicae ◽  
Diaeretiella Rapae ◽  
Linear Regression Equation ◽  
Cabbage Aphid ◽  
Total Fecundity ◽  
The Mean ◽  
Cabbage Aphids

AbstractParasitized cabbage aphids, Brevicoryne brassicae (Linnaeus), produced fewer offspring than unparasitized aphids. Aphids parasitized by Diaeretiella rapae (M'Intosh) during the first, second, or third instar died before producing any offspring; those parasitized during the fourth instar or the adult stage produced a variable number of offspring. The aphid's survival time was correlated with the rate of development, as measured by the length of the pre-reproductive period. A multiple-linear-regression equation is provided for predicting the mean total fecundity of parasitized cabbage aphids from the host age at the beginning of parasitism and the pre-reproductive period.

Direct measurement of host and parasitoid recruitment for assessment of total losses due to parasitism in a continuously breeding species, the cabbage aphid, Brevicoryne brassicae (L.) (Hemiptera: Aphididae)

1989 ◽  
Vol 79 (1) ◽  
pp. 47-59 ◽  
Author(s):  
E. R. Lopez ◽  
R. G. Van Driesche
Keyword(s):  
Population Density ◽  
Spatial Pattern ◽  
Direct Measurement ◽  
Brevicoryne Brassicae ◽  
Initial Increase ◽  
Cabbage Aphid ◽  
First Instar ◽  
Leaf Survival

AbstractIn studies in Massachusetts, the population density of Brevicoryne brassicae (L.) was measured over the lifespans of two groups of kale leaves from maturation to senescence, taking into consideration aphid spatial pattern (in colonies or as isolated insects) and aphid size as large (adults), medium-sized (nymphal instars 2–4) or small (first-instar nymphs) individuals. Total aphid densities per leaf in both leaf groups showed similar patterns of initial increase followed by a decrease as leaves aged over the 3–4-week period of leaf survival. Aphid densities reached peak values of 8·14 and 8·64 aphids per leaf for the two leaf groups studied, and 65–67% of all aphids observed occurred in colonies. Host and parasitoid recruitment to the aphid and the parasitoid immature populations were measured using a modification of the technique of Van Driesche & Bellows (1988). Total host recruitments per leaf were 43·7 and 64·6 aphids for the first and second leaf groups. Parasitoid recruitment was 6·8–8·1 for the first leaf group and 8·2–15·8 for the second. Recruitment values indicated 15·6–18.6% parasitism for the aphid cohort on the first leaf group and 12·7–24·4% for that on the second one.

scholarly journals Cabbage aphid Brevicoryne brassicae Linnaeus (Insecta: Hemiptera: Aphididae)1

EDIS ◽  
2013 ◽  
Vol 2013 (10) ◽  
Author(s):  
Harsimran Kaur Gill ◽  
Harsh Garg ◽  
Jennifer L. Gillett-Kaufman
Keyword(s):  
Brevicoryne Brassicae ◽  
Control Measures ◽  
Yield Losses ◽  
Comprehensive Understanding ◽  
Cabbage Aphid ◽  
Fact Sheet ◽  
The Family ◽  
Significant Yield ◽  
Cabbage Aphids

Cabbage aphids cause significant yield losses to many crops of the family Brassicaceae, which includes the mustards and crucifers. It is important to have a comprehensive understanding of this pest and its associated control measures so that its spread and damage can be prevented. This 5-page fact sheet was written by Harsimran Kaur Gill, Harsh Garg, and Jennifer L. Gillett-Kaufman, and published by the UF Department of Entomology and Nematology, October 2013. http://edis.ifas.ufl.edu/in1014

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