Magnetic Field Effect on the Metabolism and Enzyme Activity in Some Harmful Insects.

Abstract

Effect of the magnetic field on the physiological aspects of some insects was studied for larvae of three insects reared in laboratory under 25 ±2°C and 70 ±5% RH in suitable rearing boxes. An experimental set-up was designed to measure the magnetic flux density in the rearing box. The magnetic field was calibrated to obtain the point of the maximum gradient. Magnetic flux density was measured using a Tesla meter and recorded average values of 21.8, 249 and 863 Gauss (G) for the 3 insects respectively. The three insects were: cotton leaf warm, S. littoralis, red palm weevil, R. ferrugineus and the greater wax moth, Galleria mellonella. Rearing insects started with a suitable larval instar. Numbers of larvae (form each insect) divided into 2 similar and equal groups, the first reared as a control (without magnetic field), while the second group was exposed to the magnetic field, (MF) along rearing periods. An appropriate numbers of larvae from the control and the treated ones were taken for Bio-chemical analysis and the main parameters were recorded. The measured physiological parameters were: total protein, total carbohydrates, total lipids, invertase enzyme and alkaline phosphatase. Results showed that each of body weight and growth rate as well as the physiological aspects was affected with the magnetic field. Rate of growth was negatively affected as it decreased in cotton leaf worm and red palm weevil. Results also demonstrated that invertase enzyme decreased in the treated larvae of S. littoralis ans G. mellonella with 40.15% and 28.33% respectively lower than the control. In the same time, magnetic field led to increase the invertase enzyme in R. ferrugineus with 71.6% higher than the control samples. In spite of the strong magnetic flux around the larvae of G. mellonella their influence was limited. This may be due to the special behaviour of the worms as they of internal presence and entrance inside the rearing media for these larvae.Copy Right, IJAR, 2016,. All rights reserved.

Effect of Magnetic Water on Adult Emergence of Etiella zinckenella (Treitschke) Pupa and Root -Knot Nematode (Meliodogyne incognita) Chitwood

“…The probability was 0.215. Hussein et al (2015) investigated the effect of magnetic field on the physiological aspects of some insects, larvae of three insects which cotton leafwarm, Spodoptera littoralis, red palm weevil, Rhynchophorus ferruginous and the greater wax moth, Galleria mellonella were rearing under laboratory condition.…”

The Impact of Magnetic Field on Insecticide Toxicity Measured by Biological and Biochemical Parameters of Earias insulana (Boisd)

“…A systematic review has evaluated the state of knowledge on the toxic effects of electromagnetic fields (EMF) on some insects [Thill, 2020]. Some general reviews have reported on the effects and mechanisms of EMF exposure on insects [Hussein et al, 2015], new findings in the cell biochemistry of insects, and the impact of changes in insects' biology or population dynamics [Kandil et al, 2018, 2019]. Additional negative effects that were described in different studies included the direct exposure of adult Pectinophora gossypiella and E. insulana to magnetic power (42, 12, and 4.2 mT), showing that some biological aspects were affected, such as development time, malformation of different stages, and generation times [Said et al, 2017; Kandil et al, 2018, 2019], along with reduced reproductive ability and fertility [Balmori, 2015], lethargy, failure to find food, escape behavior, disturbance of the sense of orientation, and reduced reaction speed.…”

“…A systematic review has evaluated the state of knowledge on the toxic effects of electromagnetic fields (EMF) on some insects [Thill, 2020]. Some general reviews have reported on the effects and mechanisms of EMF exposure on insects [Hussein et al, 2015], new findings in the cell biochemistry of insects, and the impact of changes in insects' biology or population dynamics [Kandil et al, 2018.…”

Effect of Magnetic Field on Metabolism and Enzyme Activity in Some Harmful Insects

“…Magnetism and using magnetic field seems to be promising physical method in pest control (Hussein et al, 2014). Recently we have to focus some lights on magnetism and the effect of electro-magnetic waves on the different biological aspects of insects.…”

“…temperature, different types of waves e.g. gamma rays (Hussein et al, 1999) and electro-magnetic waves (Hussein et al, 2014). Sak et al (2011) in their studies on Galleria mellonella larvae stated that total protein increase in cases of injury and wounding or exposure to high doses of venoms.…”