Aquatic organisms

Genetic analysis was studied in a 5 × 5 diallel cross following Hayman's diallel analysis approach to obtain additive and dominance components of genetic variance using a mature embryo culture protocol. Different concentrations of NaCl at 5 and 10 g L -1 were added to each medium. Callus fresh weight (g), shoot length (cm), root length (cm), proline (µg g -1), sodium (mg g -1) and potassium (mg g -1) content were determined. Also, screening for non-water-soluble protein polymorphism was carried out using leaves derived via callus culture and analysis using SDS-PAGE. Results on the genetic behaviour for previously traits, indicating the differences among the genotypes were significant (p ≤ 0.05) and highly significant (p ≤ 0.01). Wr/Vr graph in diallel analysis and average degree of dominance together with narrow-sense heritability values revealed additive gene effect for shoot length under control and saline treatments and callus fresh weight under control, while dominance gene ...

Peach fruit fly, Bactrocera zonata (Saunders) (Diptera: Tephritidae), has been a serious pest in the last decade attacking a wide range of fruits in Egypt. The toxicity of Malathion, Diazinon, Methoxyfenozide, and Lufenuron to adult males and females of Bactrocera zonata was studied under laboratory conditions. Diazinon was the most toxic among the tested compounds followed by Malathion, Lufenuron and Methoxyfenozide to Bactrocera zonata at 24 h post treatment, the respective LC50 values were 0.20 ppm, 0.48ppm, 8.97ppm, and 9.73ppm for males and 0.26 ppm, 0.91ppm, 11.26ppm, and 14.12ppm for females. At 48 h post treatment Diazinon was the most toxic followed by Malathion, Methoxyfenozide and Lufenuron to Bactrocera zonata, LC50 values were 0.09ppm, 0.34ppm, 1.60ppm, and 1.88 ppm for males and 0.14 ppm, 0.44ppm, 1.68ppm and 2.17 ppm for females. At 72 h post treatment Diazinon was the most toxic followed by Malathion, Lufenuron and Methoxyfenozide to Bactrocera zonata, LC50 values we...

The peach fruit fly, Bactrocera zonata (Saunders, Diptera: Tephritidae), has been a serious pest in the last decade attacking a wide range of fruits in Egypt. The toxicity of Malathion, Diazinon, Methoxyfenozide and Lufenuron to adult males and females of B. zonata was studied under laboratory conditions. The results showed that Diazinon was the most toxic among the tested compounds followed by Malathion, Lufenuron and Methoxyfenozide. LC50 values for adult males and females were 0.20 ppm, 0.09 ppm and 0.02 ppm (for males), 0.91 ppm, 0.14 ppm and 0,01 ppm (for females), respectively. The results showed that the level of glutamic oxaloacetic transaminase (GOT) of treated adult males and females in 24 h, 48 h, and 72 h post treatment increased compared to untreated adults. The highest activities of GOT in treated adult males in 24 h, 48 h, and 72 h were 92.11µM, 101.99µM and 112.21µM pyruvate released × 103/min/g FW (fresh weight), respectively, for Methoxyfenozide LC10, and in treate...