FIELD AND LABORATORY OBSERVATIONS ON SOME TREE BORERS AND THEIR HOSTS IN NORTH SINAI GOVERNORATE, EGYPT. | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 6, Volume 82, Issue 2, July 2004, Page 559-572 PDF (3.89 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2004.258143 | ||||
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| Author | ||||
| ABD EL-GHANY. M. BATT | ||||
| Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt | ||||
| Abstract | ||||
| The present investigation showed some field and laboratory observations on the borers infesting economic fruit and wood trees in North Sinai Governorate. Studies revealed that the survival of Capnodis carbonaria beetles, differed during different months, the longest survival was 48.8 days during December, while the shortest one was 12.5days during July. Monthly relative percentage of deposited eggs/female were 7.5, 12.5, 27.5, 22.5, 19.5 and 11.1% during May to October, respectively. Debra rulbmacmhata, infested mango trees also. The activity period of this pest was observed from April until November. The beetles were able to attack fig, mango, sycamore and apple with relative percentages of deposited eggs 21.3, 31.7, 40.2 and 6.8 % on previous hosts, respectively. However, peach, pear, mulberry and acacia were not suitable to infestation. The seasonal emergence of Xystrocera globose beetles were abundant during different seasons. The emergence percentages were 9.8 % , 41.1% , 37.3 % and 11.8 % for winter, spring, summer and autumn, respectively. Two peaks of emergence were observed during May and September. Monthly relative percentages of developmental stages of Steraspis squamosa within tamarisk trees showed that the immature larvae and beetles were abundant within the host throughout the whole year, the full grown larvae and pre-pupae were observed from February to November, while the pupae were found during March to December. Beetles had quiescence period within trees during winter and early spring months. The weather factors revealed positive significant effect on population of fullgrown larvae, pre-pupae and pupae, while the effect was negative significant on adults population within trees. | ||||
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