Biological study of long headed flour beetle Latheticus oryzae with Physical control under incubator conditions | ||
| Journal of Tikrit University For Agriculture Sciences | ||
| Article 1, Volume 12, Issue 3, September 2012, Pages 69-76 | ||
| Authors | ||
| O. S. Mohammad; and B. Y. Saliem | ||
| Abstract | ||
| Abstract : In this study description of the different stages of the beetle L. oryzae was conducted. Study of biological details also was happened under breeding conditions of 35° C. and 70 % humidity. The results showed that the average of pre-oviposition and the incubation periods were 3.4 & 2.0 days respectively the percentage of hatching was 92 %. and the number of eggs / female was 495. The larval stage had eight instars (7 ecdysis). the average of which were: 2.3, 2.3, 2.8. 2.6, 2.5, 2.7, 2.8 and 2.7 days. The average period of the larval stage was 20.7 days. The duration periods of the pupal stage were 4.4 and 4.9 days for male and female respectively, the female pupa was larger than the male one. The adult beetles lived 195 and 188 days for the male and female beetles respectively. The non-coupled females can oviposit eggs but only few numbers after about 15 days of emergence. The beetle had six generations through its live. The exposure of the different stages of the insect to low temperature degrees showed that it had high sensitive for the freezing degree (zero).and the exposure eggs were dead through 2 days. while the first larval instars was dead after 1 day. and the last instars of which was dead after 4.2 days, while the pupa was dead after 5.2 days. and the adults after 2.7 days. Moreover the different stages of this beetle showed very high sensitivity to the heating degrees especially to 50 and 55°C. The eggs, larvae (first and last instars), pupae and adults were dead after 4.0, 2.7, 4.0, 3.5, and 4.0 hr. respectively when exposures to 50°C. but all stages were died when exposed to the 55ºC after 20, 30, 40, 46 and 54 min. respectively. | ||
| Keywords | ||
| flour beetle; Physical control | ||
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