Mortality Responses of Spodoptera litura Following Feeding on BT- Sprayed Plants

Al-Otaibi,

doi:10.6000/1927-5129.2013.09.27

Cited by 12 publications

(5 citation statements)

References 30 publications

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“…Chemical control is the most common method for pest control (Cooper and Dobson 2007;Song and Swinton 2009) and its use has increased in various cultures, especially in developing countries (Song and Swinton 2009;Meissle, et al 2010;Lu, et al 2012;Pedlowski, et al 2012). The synthetic chemical insecticides are presently the main method for controlling the cotton leafworm, S. littoralis in Egypt and will likely continue to be used until more biologically based management studies could be developed (Alotaibi, 2013).…”

Section: Figure 3 the Efficiency Of Tested Compounds Against S Littoralis And C Carnea Under Laboratory Conditions Based On Lc50 Values Dmentioning

confidence: 99%

The Relative Potency of some Pesticides against Cotton Leafworm, Spodoptera littoralis (Boisd.) and their Side Effect on the Natural Enemy, Chrysoperla carnea (Stephens)

Abdullah

2021

Journal of Plant Protection and Pathology

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The cotton leafworm, Spodoptera littoralis (Boisd.) is one of the dangerous economic insects on different crops in Egypt because it causes more damages in crops especially cotton and leafy vegetables. On the other hand, the natural enemy, Chrysoperla carnea (Stephens) is an important predator in all fields because it is able to control many insect pests and mites. In this study, six commercial pesticides (Chlorpyrifos, Alpha-cypermethrin, Methomyl, Abamectin, Biossiana, and Dipel) and two new compounds under the study (Crude extract of Beauveria bassiana metabolites and synthesis compound from Cyanoacetamide derivatives) were tested to determine their toxicity against the 2 nd instar larvae of S. littoralis and their side effects against the 2 nd instar larvae of C. carnea. All tested compounds had different degrees of toxicity against both tested insects. Based on the values of LC50 , toxicity index and relative potency, Alpha-cypermethrin was the highest toxic pesticide against S. littoralis and C. carnea followed by Methomyl and Chlorpyrifos but Biossiana was the least toxic one. In addition, the toxicity of tested chemical pesticides against C. carnea was more than their toxicity against S. littoralis. While, the toxicity of tested biopesticides against C. carnea was less than their toxicity against S. littoralis. In general, the sensitivity of the predator C. carnea to the tested biopesticides was less in comparison with chemical pesticides. Therefore, this study recommends using biopesticides besides the slight using of chemical pesticides to preserve the natural enemies and environment and achieve the best pest control.

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Section: Figure 3 the Efficiency Of Tested Compounds Against S Littoralis And C Carnea Under Laboratory Conditions Based On Lc50 Values Dmentioning

confidence: 99%

The Relative Potency of some Pesticides against Cotton Leafworm, Spodoptera littoralis (Boisd.) and their Side Effect on the Natural Enemy, Chrysoperla carnea (Stephens)

Abdullah

2021

Journal of Plant Protection and Pathology

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“…Therefore, integrated pest management (IPM), which does not rely solely on chemicals, is required to control S. litura . Delta endotoxins (Bt toxins) and nuclear polyhedrosis virus (NPV) have shown some success as a biological control [ 7 , 8 ]; however, the practical use of physical control is limited to primary methods such as blocking with insect nets.…”

Section: Introductionmentioning

confidence: 99%

Measuring the Flight Trajectory of a Free-Flying Moth on the Basis of Noise-Reduced 3D Point Cloud Time Series Data

Nishisue,

Sugiura,

Nakano

et al. 2024

Insects

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Pest control is crucial in crop production; however, the use of chemical pesticides, the primary method of pest control, poses environmental issues and leads to insecticide resistance in pests. To overcome these issues, laser zapping has been studied as a clean pest control technology against the nocturnal cotton leafworm, Spodoptera litura, which has high fecundity and causes severe damage to various crops. For better sighting during laser zapping, it is important to measure the coordinates and speed of moths under low-light conditions. To achieve this, we developed an automatic detection pipeline based on point cloud time series data from stereoscopic images. We obtained 3D point cloud data from disparity images recorded under infrared and low-light conditions. To identify S. litura, we removed noise from the data using multiple filters and a support vector machine. We then computed the size of the outline box and directional angle of the 3D point cloud time series to determine the noisy point clouds. We visually inspected the flight trajectories and found that the size of the outline box and the movement direction were good indicators of noisy data. After removing noisy data, we obtained 68 flight trajectories, and the average flight speed of free-flying S. litura was 1.81 m/s.

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“…Therefore, integrated pest management (IPM), which does not rely solely on chemicals, is required to control S. litura. Delta endotoxins (Bt toxins) and nuclear polyhedrosis virus (NPV) have shown some success as a biological control (Kumari and Singh 2009;Alotaibi 2013); however, the practical use of physical control is limited to primary methods such as blocking with insect nets.…”

Section: Introductionmentioning

confidence: 99%

Measuring the flight trajectory and speed of a free-flying moth on the basis of noise-reduced 3D point-cloud time series

Nishisue,

Sugiura,

Nakano

et al. 2023

Preprint

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Pest management is essential in crop production; however, frequent application of chemical pesticides that are used as a main tool for pest control causes environmental issues and insecticide resistance in pests. To overcome these issues, laser zapping has been used to control insects such as cockroaches and mosquitoes. In Japan, laser zapping has been studied to physically control cotton leafworm, Spodoptera litura, which is nocturnal, has a high fecundity and some insecticide-resistant populations, and severely damages to a variety of crops. To regulate behaviors of adult S. litura by laser zapping, its flight trajectory including flight speed must be identified and then predicted precisely under night conditions. Therefore, we aim to establish the automatic detection pipeline for flight trajectory based on point-cloud time series considering the factors reflecting noise data. In this study, the 3D point cloud data were obtained from the recorded disparity images under infrared lights in a low-lux condition. We removed the noise using multiple filters calculating background noise, the size of point cloud, the length of point-cloud time series, and linear SVM (support vector machine) for classifying S. litura and noise. To eliminate noisy flight trajectory data, we computed the voxel volume and directional angle of the 3D point-cloud time series, and then visually inspected and removed the noise data. Obtained 68 flight trajectories in total showed that mean flight speed of free-flying S. litura was 1.81 m/s and directional angle different between true and noise flight trajectories can be a good indicator for noise detection.

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Mortality Responses of Spodoptera litura Following Feeding on BT- Sprayed Plants

Cited by 12 publications

References 30 publications

The Relative Potency of some Pesticides against Cotton Leafworm, Spodoptera littoralis (Boisd.) and their Side Effect on the Natural Enemy, Chrysoperla carnea (Stephens)

The Relative Potency of some Pesticides against Cotton Leafworm, Spodoptera littoralis (Boisd.) and their Side Effect on the Natural Enemy, Chrysoperla carnea (Stephens)

Measuring the Flight Trajectory of a Free-Flying Moth on the Basis of Noise-Reduced 3D Point Cloud Time Series Data

Measuring the flight trajectory and speed of a free-flying moth on the basis of noise-reduced 3D point-cloud time series

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