Sıcaklığın, Avcı Böcek, Nephus includens Kirsch (Coleoptera: Coccinellidae)'in Gelişimi ve Üremesi üzerine Etkisi

Tez Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Çukurova Üniversitesi, Fen Bilimleri Enstitüsü, Bitki Koruma, Türkiye

Tez Danışmanı: Prof. Dr. Nedim Uygun

Tezin Onay Tarihi: 1996

Tezin Dili: Türkçe

Özet:

he effect of different temperatures on some biological properties of Nephus includens Kirsch (Coleoptera: Coccinellidae) was investigated. This species is one of the most important predators of Planococcus citri Risso (Homoptera: Pseudococcidae). The development time, mortality and fecundity were determined at constant temperatures of 15, 20, 25, 30, and 35 C and at the variable temperatures, 25–35 C (12 hours 25 C, 12 hours 35 C). Life tables were also constructed for 25, 30, 35, and 25–35 C. The mortality was lower and the mean generation time was shorter at 30 C than at all other temperatures except 35 C. The intrinsic rate of increase was the highest at 30 C (0.081), followed by 0.076 at 25–35 C. The net reproductive rate was higher at 25–35 C than at 30 C. From biological data and population growth parameters calculated from the life tables, 30 C and 25–35 C were determined to be the most suitable temperatures for mass rearing of Nephus includens. However, mass rearing at a temperature as high as 35 C could cause deterioration of sprouted potatoes on which the citrus mealybug is reared. Therefore, 30 C would be better than 25–35 C.