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The seasonal abundance and population density of emerged moths of Synanthedon myopaeformis Borkh. (Lepidoptera : Sesiidae) from infested apple trees at Berket El Saba district, Menoufia governorate during 2015 and 2016 years exhibited that the emerged moths continued all year round where, nine emergence peaks were recorded throughout year months. The highest number of emerged moths was observed during the summer months (40.96% and 41.26% at 2015 and 2016 seasons, respectively) and the highest monthly percentage of emerged moths was recorded in August. The highest number of emerged moths were recorded at the basic stem region 0-50cm above the ground surface, while the least number of emerged moths was found at the height 150-200cm and there was significant positive correlation between minimum & maximum temperatures and number of emerged moths, while the correlation was negative between RH% and number of emerged moths. The obtained results indicated that the minimum & maximum temperatures and RH% were responsible for 71.67% and 73.71% of changes population during the successive periods at 2015 and 2016, respectively.

The serious blue butterfly, Chilades pandava -Horsfield, 1829- (Lepidoptera: Lycaenidae) is consider one of the main destructive insect pests for ornamental palms Cycas and Zamia. Biological and morphological measurements were carried out of C. pandava stages reared on Cycas revoluta (Cycadaceae) and Zamia encephalartoides (Zamiaceae). In description details, non-significant variations were recorded between the two gender of cycad blue butterfly in the obtained data, but the male adult was more densely blue or violet than female adult. By the aid of SEM, C. pandava all stages were distinct by long and thick hairs covered all the body. The morphometric characters namely, length, width and venation of wings, body length, forewing, hindwing could be as a guide for taxonomic discrimination. The data showed that the life cycle duration of C. pandava was ranged between 20.64 to 21.7 days. The developmental periods of different C. pandava stages are slightly higher on zamia than cycas palms. This investigation detected that a high survival rate was found on Cycas palms (86%) than the survived rate recording on Zamia palms (82%). In the present study, the described morphometric characters could be used as a guide for taxonomic discrimination of this pest. Consequently, this study added a valuable knowledge about C. pandava to have sound decisions for proposal of its management and conservation in Egypt.

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The present work was carried out to study the effect of infestation type, host plant, moisture content, chemical components and prevailing conditions of temperature and relative humidity as well as natural enemies on the infestation of beetle, Sinoxylon sudanicum Lesne (Coleoptera: Bostrichidae) to nine host plants. Intact branch cuttings were collected from Cassia fistula, Poinciana regia, Cassia renigera, Ficus sycomorus, Morus alba, Mangifera indica, Sailxae gyptiace, Casuarina equisetifolia and Eucalyptus citriodora trees, and transferred to laboratory to study the points of article. The obtained data, reported that the obligatory infestation detected that Cassia fistula attracted the highest number of beetles (7.93 beetles) and gave the highest number of emerged beetles (24.53 beetles), while it showed the lowest duration of generation (50.7days), whereas, Mangifera indica attracted 3.13 beetles and gave 9.3 beetles and recorded the longest duration of generation 81.2days. Facultative infestation showed that the highest percentage of infestation (27.2%) recorded for Cassia fistula, while the lowest infestation percentage 6.67% recorded for Morus alba. The suitable moisture content to infestation was varied from 46.45% to 11.61% for Cassia renigera, while the minimum value recorded 7.78% for Cassia fistula. The infestations were decreased with the increasing in phenol content, while duration of generation for beetles increased with increased phenol content. The host plant with high content of carbohydrate (Cassia fistula) infested by highest number of beetles (7.93beetle) and gave the highest number of emerged beetles. S.sudanicum beetle emergence is accompaniment for predator beetle Tarsostenus univittatus (Fam.: Cleridae).