CONTROLLING PULSE BEETLE, Callosobruchus chinensis L. BY GAMMA IRRADIATION AND BACTERIA Bacillus thuringiensis | ||
| Journal of Plant Protection and Pathology | ||
| Article 8, Volume 30, Issue 3, March 2005, Pages 1717-1723 PDF (521.12 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jppp.2005.238865 | ||
| Authors | ||
| I. S. Essa1; H. A. Helal1; Zamzam A. Ahmed2; A. I. Attia2 | ||
| 1Faculty of Agriculture, Al-Azhar University, Cairo, | ||
| 2Biological Applications Department, Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt. | ||
| Abstract | ||
| The mean weight loss of seeds after one month decreased as the result of feeding of treated C. chinensis. The reduction in weight is inversely proportion to the radiation dose. The weight of seeds was 95.5 and 98.0 gm at the dose levels 20Gy and 40Gy respectively when compared with 91.16 gm in the control treatment and 93.10 gm when the pest exposed to B.t(Lc50) . The change percent in weight of seeds from control ranged between 1.47 and 6.41 at the dose range 2.5, - 40 Gy. The mean weight loss of seeds after two months was significantly lower at all treatments when compared with both the control and the B.t (Lc50) treatments. The reduction weight is continues during the third period (after three months) at both the control and the B.t (Lc50) treatments. In addition, the decrease in weight of seeds was more appearance in this period of storage. The percentage of change in weight from control increased vertically by increasing the radiation dose and horizontally by increasing the storage time. The total number of insects after one month decreases by increasing the radiation dose. The propagation after one month was affected by the B.t (Lc50) only or when combined with gamma radiation. The mortality percent of adults was 55.81%, 83.96% and 88% at 2.5Gy, 5Gy and 20Gy combined with B.t. (Lc50) treatments respectively. The propagation after two months was more effected than after one month at all treatments. The mortality percent reached 100% at all treatments except at the 20Gy. The total number of adults decreased significantly by increasing the radiation dose . At the female sterile dose 40Gy recorded 20 adults (10 pairs put per 100 gm seeds to start the experiment) which are dead after one month. | ||
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