scholarly journals Tritrophic Association between Bt Cotton, Arthropod Pest and Natural Enemies

2020 ◽  
Author(s):  
Muhammad Rafiq Shahid ◽  
Muhammad Shakeel ◽  
Muhammad Farooq ◽  
Saghir Ahmad ◽  
Abid Mahmood
Keyword(s):  
Natural Enemies ◽  
Bt Cotton ◽  
Arthropod Pest

scholarly journals Exotic urban trees conserve similar natural enemy communities to native congeners but have fewer pests

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e6531 ◽  
Author(s):  
Steven D. Frank ◽  
Kristi M. Backe ◽  
Casey McDaniel ◽  
Matthew Green ◽  
Sarah Widney ◽  
...  
Keyword(s):  
Natural Enemies ◽  
Tree Species ◽  
Native Species ◽  
Urban Trees ◽  
Scale Insects ◽  
Single Family ◽  
Exotic Trees ◽  
Exotic Tree ◽  
Native Tree Species ◽  
Arthropod Pest

Urban trees serve a critical conservation function by supporting arthropod and vertebrate communities but are often subject to arthropod pest infestations. Native trees are thought to support richer arthropod communities than exotic trees but may also be more susceptible to herbivorous pests. Exotic trees may be less susceptible to herbivores but provide less conservation value as a consequence. We tested the hypotheses that native species in Acer and Quercus would have more herbivorous pests than exotic congeners and different communities of arthropod natural enemies. The density of scale insects, common urban tree pests, was greatest on a native Acer and a native Quercus than exotic congeners in both years of our research (2012 and 2016) and sometimes reached damaging levels. However, differences in predator and parasitoid abundance, diversity, and communities were not consistent between native and exotic species in either genus and were generally similar. For example, in 2012 neither predator nor parasitoid abundance differed among native and exotic Acer congeners but in 2016 a native species, A. saccharum, had the least of both groups. A native, Q. phellos, had significantly more predators and parasitoids in 2012 than its native and exotic congeners but no differences in 2016. Parasitoid communities were significantly different among Acer species and Quercus species due in each case to greater abundance of a single family on one native tree species. These native and exotic tree species could help conserve arthropod natural enemies and achieve pest management goals.

Seasonal abundance of natural enemies on bg-I and bg-II Bt cotton ecosystem

2017 ◽  
Vol 41 (2) ◽  
pp. 153
Author(s):  
A.G. Badgujar ◽  
B.B. Bhosle ◽  
B.V. Bhede ◽  
S.S. Dhurgude
Keyword(s):  
Natural Enemies ◽  
Seasonal Abundance ◽  
Bt Cotton

scholarly journals Effects of Nitrogenous Fertilization and some Insecticides on the Natural Enemies of Transgenic Bt Cotton Pests

2021 ◽  
Vol 14 ◽  
pp. e948
Author(s):  
Mamoun Fadlelmawla ◽  
Azhari Abdelbagi ◽  
Abd Elaziz Ishag ◽  
Ahmed Hammad ◽  
Jang-Hyun Hur
Keyword(s):  
Natural Enemies ◽  
Nitrogen Fertilization ◽  
Integrated Management ◽  
The Other ◽  
Chrysoperla Carnea ◽  
Bt Cotton ◽  
Percentage Reduction ◽  
Cotton Pests ◽  
Field Assessment ◽  
Chemical Groups

Field assessment of integrated management of BT cotton pests was carried out in two consecutive seasons; 2016/2017 and 2017/2018 in the experimental research farm of the Kassala University, Sudan. Four insecticides (imidacloprid, abamectin, profenofos, and lufenuron) from different chemical groups and with a different mode of action and three levels (43.81 kgha-1, 87.62 kgha-1, and 131.43 kgha-1) of soil-applied nitrogen were tested in the IPM package. Insecticides were applied at the recommended doses. A total of 7 weekly counts of prevailing natural enemies [Chrysoperla carnea (Stephens) and Aenasius bambawalei Hayat] were carried out for 4 weeks before spraying and 3 weeks post spraying starting the 3rd week from spraying. Results indicated that nitrogen level exerted no significant effects on the populations of prevailing natural enemies; C. carnea and A. bambawalei. Based on average post spray counts and percentage reduction over the control, all insecticide treatments significantly reduced the population of the natural enemies. Imidacloprid and profenofos exerted the highest reduction of C. carnea population followed by abamectin and lufenuron (56.03, 48.25, 07.78 and 06.61% respectively) in the first season, while profenofos, imidacloprid, lufenuron, and abamectin induced the highest reductions (55.94, 45.05, 17.57 and 17.33% respectively) in the second season. On the other hand, reductions in A. bambawalei population (abundant in season 1 only) followed the order; imidacloprid, lufenuron, abmectin, and profenofos (03.95, 02.63, 202.63, and 01.32%, respectively). Interactions between nitrogen fertilization and insecticide were not significant as measured by the population of prevailing natural enemies.

Effect of insecticide and fertilizer combination on natural enemies of Bt cotton

2015 ◽  
Vol 39 (2) ◽  
pp. 153
Author(s):  
D.A. Dhere ◽  
Y.T. Jadhav ◽  
R.R. Patil
Keyword(s):  
Natural Enemies ◽  
Bt Cotton ◽  
Fertilizer Combination

scholarly journals The outbreaks of nontarget mirid bugs promote arthropod pest suppression in Bt cotton agroecosystems

2019 ◽  
Vol 18 (2) ◽  
pp. 322-324 ◽  
Author(s):  
Wenjing Li ◽  
Lili Wang ◽  
Coline C. Jaworski ◽  
Fan Yang ◽  
Bing Liu ◽  
...  
Keyword(s):  
Bt Cotton ◽  
Pest Suppression ◽  
Arthropod Pest

scholarly journals Field Evaluation of Selective Systemic Formulations against Sucking Insect Pest Complex and their Natural Enemies on a Transgenic Bt Cotton

2017 ◽  
Vol 49 (5) ◽  
Author(s):  
Talha Nazir ◽  
Muhammad Dildar Gogi ◽  
Muhammad Zeeshan Majeed ◽  
Waheed ul Hassan ◽  
Abdul Hanan ◽  
...  
Keyword(s):  
Natural Enemies ◽  
Insect Pest ◽  
Field Evaluation ◽  
Bt Cotton ◽  
Transgenic Bt Cotton

scholarly journals Population dynamics of natural enemies on bt / non bt cotton and their correlation with weather parameters

2017 ◽  
Vol 9 (4) ◽  
pp. 2360-2365 ◽  
Author(s):  
Roomi Rawal ◽  
K. K. Dahiya ◽  
Roshan Lal ◽  
Adesh Kumar
Keyword(s):  
Population Dynamics ◽  
Natural Enemies ◽  
Maximum Temperature ◽  
Adult Plant ◽  
Bt Cotton ◽  
Crop Season ◽  
Cotton Genotypes ◽  
Weather Parameters ◽  
Two Peaks ◽  
Cotton Cultivar

The field study was carried out at Research Farm of cotton section, Department of Genetics and Plant Breeding, CCS Haryana Agricultural University, Hisar, India to determine the effect of environmental factors and seven cotton genotypes (Bt and non Bt) on three natural enemies namely chrysoperla, coccinellids beetle and spi-ders. Natural enemies remained active throughout the crop season (with two peaks) with little differences among them. Chrysoperla and coccinellids both were remained active from 25th to 40th SMW (June to October, 2014) while spiders were active from 25th to 41st. It was observed that highest population of Chrysoperla (1.17 eggs/plant) and spiders (1.59 adult/plant) was observed on Bt cotton cultivar namely RCH-134 and JK-1947 respectively. However, coccinellids preferred non Bt genotype (HHH-223) for their population build-up. Chrysoperla and coccinellids popula-tion was significantly negatively correlated with maximum temperature (r = -0.527 at 5% and r = -0.626 at 1% re-spectively); positively correlated with RHm, RHe; negatively correlated with minimum temperature and wind speed without significance. While, spiders population showed negative correlation with all weather parameters except sun-shine hours. It was observed that population of the natural enemies fluctuated under different environmental conditions during cotton season.

Effect of insecticide and fertilizer combinations on the natural enemies of Bt cotton

2016 ◽  
Vol 78 (4) ◽  
pp. 332
Author(s):  
D. A. Dhere ◽  
Y.T. Jadhav ◽  
R. R. Patil
Keyword(s):  
Natural Enemies ◽  
Bt Cotton
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