INFLUENCE OF DIFFERENT CONSTANT TEMPERATURE DEGREES AND HOST PLANTS ON CERTAIN BIOLOGICAL ASPECTS OF THE MELON LADYBIRD BEETLE Epilachna chrysomelina (F.) (COLEOPTERA: COCCINELLIDAE) | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 4, Volume 2, Issue 1, January 2011, Page 31-40 PDF (431.8 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2011.84651 | ||||
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| Authors | ||||
| S. S. Awadalla1; Horia A. Abdel-Wahab2; N. F. Abd El-Baky1; Shymaa S. Abdel-salam2 | ||||
| 1Economic Entomology Dept., Fac. Agric., Mans. Univ. | ||||
| 2Plant Protection Inst. Agric. Reas. Centre, Dokki, Giza. | ||||
| Abstract | ||||
| Laboratory experiments were carried out in the insectory of Economic Entomology Department,Faculty of Agriculture, MansouraUniversity, under three constant temperature 24±1, 28±1and 32±1ºC and 60.0±5% R.H. The total duration of the immature stages were the shortest (28.3± 2.7 days) when the insect pest reared under constant temperature of 32±1ºC followed by (37.4 ± 2.6 days) at 28 ±1ºC and the longest period was recorded at 24± 1ºC and represented by (41.9 ± 2.8 days) with highly significant differences. The highest percentages of hatchability, the survival of larval stage , pupal stage as well as the total immature stages were recorded when the insect reread at 28± 1ºC and represented by 95.0 , 88.4 , 97,6 and 82% , respectively. On the other hand , the lowest percentages were 87.0 , 78.2 , 95.7 and 65% for hatching , the survival of larval stage, pupal stage and the total immature stages at 24± 1ºC , respectively. The ovipositional periods ( pre – oviposition period , oviposition period and inter - oviposition period ) as well as the female and male longevity were the shortest when the melon ladybird beetle reared at 32±1ºC followed by 28±1 ºC and 24±1ºC while , the fecundity ( average number of eggs / female ) were the highest at 28±1 ºC and represented by 743.0 ± 25.8 eggs / female and the lowest fecundity at 24±1ºC and represented by 570.7 ± 28.6 eggs / female with highly significant differences. The total duration of the immature stages were the shortest (37.4± 2.6 days) when the insect pest reared on snake cucumber followed by (39.0 ± 3.5 days) on squash, (39.5± 2.7 days) and watermelon and the longest periods were recorded on cucumber and represented by (40.9 ± 2.4 days) .Highly significant differences were recorded between the total duration of the immature stages reared at different host plants. The highest percentages of hatchability, the survival of larval stage , pupal stage as well as the total immature stages were recorded when the insect reread on snake cucumber and represented by 95.0 , 88.4 , 97,6 and 82% , respectively. On the other hand , the lowest percentage were 89.0 , 72.1 , 93.7 and 60% for hatching , the survival of larval stage , pupal stage and the total immature stages on cucumber , respectively. The ovipositional periods ( pre – oviposition period , oviposition period and inter - oviposition period ) as well as the female and male longevity were the shortest when the melon ladybird beetle reared on snake cucumber followed by squash ,watermelon, and cucumber .While, the fecundity Were the highest on snake cucumber and represented by 743.0 ± 25.8 eggs / female and the lowest fecundity on cucumber and represented by 275.5 ± 19.8 eggs / female with highly significant differences according to the different host plants. | ||||
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