دراسة تأثير الموجات فوق الصوتية متعددة الترددات مع مستخلصات Nerium oleander على نمو يرقات السايبرد للبرنقيل Balanus amphitrite amphitrite

Abstract EN

This study was conducted to demonstrate the effective compound extracted from Nerium oleander and ultrasound of mixed frequencies (10-50) ( 45 - 20 ) (50-60) KHz on the growth of larvae cyprid the barnacle B.a.amphitrite in Nasiriyah thermal power station outlet water.

The samples were collected at a rate of twice a month and three replicates and each time in the morning, and the larvae were used by 12 of the larva replicates in the totals for control and transaction experience of biological and physical control.

The results of the aqueous extract and alcoholic extract high loss ratio for the larvae of cyprid reaching70 % and 55.4 % respectively in the last day and a concentration of 5 mg / ml.

The proportion of the loss of larvae as well as cyprid amounted to 100 % when using ultrasound at mixed frequencies, The ultrasound is better than plant extract in inhibiting the destruction of larvae of cyprid.