Lab-experiment to declare the effect of static magnetism on theessential cinnamic oil and comparing its effect with non- magneticcinnamic essential oil and the insecticide, cymax 50% on 2nd instarlarvae of the cotton leafworm, Spodoptera littoralis (Boisd.)(Lepidoptera: Noctuidae). Key words: Magnetic field, Magnetism, Pest control, Insect egg hatchability. to be more suitable for Trichogramma parasite production programmes. Also, magnetism may delay egg development of Sitotroga sp. Many investigations have to be done in using magnetism and magnetic field to minimize the population of harmful insects. hatching eggs were decreased from 90%(in the control) to 22% in the magneticįield with (11megnet unit) Also, Trichogramma sp decreased from 82.31% to 47.06% while egg hatching of Spodoptera littroralis was decreased from 95.20% to 56.80, finally S.exigua decreased from 90% to 50.86%. Results showed that there was a linear negative relationshipīetween the force of the magnetic field and the hatchability percentage of the eggs exposed in. Along 10 days the daily observations included: hatchability percentage, developing and emergency, living and /or death of the larvae under the three magnetic field treatments. Similar groups of eggs of the above mentioned insects were prepared and exposed to the magnetic field resulted from 1,5 and 11 magnet units, (140- 160 gauss resulted from each) control was left without treatment. A completely randomized experiment with three replicates was designed. ABSTRACT: The current research aimed to investigate changes in the state of egg hatching of four economic insects: Sitotroga ceralella, Trichogramma evanescens, Spodoptera littroralis and spodoptera exigua.
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