Effect of magnetic field on some biological and biochemical parameters of Earias insulana (Boisd.) (Lepidoptera: Noctuidae)

Document Type : Research articles

Authors

1 Economic Entomology and Agriculture Zoology Department, Faculty of Agriculture, Menoufia University, Egypt

2 Plant Protection Research Institute, Agriculture Research Center, Dokki - Giza,Egypt

Abstract

In this experiment, new technologies used to study the effects of two magnetic
levels on longevity, fecundity and some biochemical parameters of Earias insulana
adults. Two magnetic levels were used to produce a high magnetic field, (MF1) =
(20.8 mt. in lower and 1.3 mt. in center jars) and another low, (MF2 = (2.1 mt in lower
and 1.21mt in center) compared with non exposed adults (control). The results
demonstrated that the total eggs laid /female and hatchability in exposed adults were
highly significantly affected compared with control. Mean numbers of eggs
laid/female were 77.0 and 109.6, when adults were exposed to MF1 and MF2,
respectively, compared with 175.0 eggs/ female in control. The percentages of eggs
hatchability were 49.6 and 79%, in exposed adults to MF1 and MF2 respectively,
compared with 95 % in control. Data reported that exposure of adults to selected
magnetic fields; MF1 and MF2 reduced the mean number of eggs /female.
Percentages were 56% and 48.8% when exposed to high and low power (MF1and
MF2) respectively. The results indicated that longevity of exposed females and
males were significantly affected compared with control. Longevity of adult males
decreased to about half the time when exposed to high powers MF1, the longevity of
exposed males to MF1 and MF2 were 6.6 and 9.6 days/ male, respectively but it was
13.3 days/male in control. In females, the longevity decreased after exposure to the
higher MF, whereas prorogated after exposure to the lower magnetic levels, the
longevities of exposed females to MF1 and MF2 were 12.8 and 16.4 days / female
respectively, compared with 15.8 days / female in control. In additions, the effects of
exposure to the magnetic fields MF1 and MF2 on some biochemical parameters
were determined. The results showed high decreased in levels of some key
biochemical such as total proteins, total lipid, Free-amino acid and carbohydrates

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