Investigations on some Biological Characters of Pseudococcus cryptus (Hempel) (Hemiptera: Pseudococcidae) on Four Citrus species

The developmental time, longevity, fecundity, sex ratio, duration of preoviposition, oviposition and postoviposition, number of nymphs and life table parameters of Pseudococcus cryptus (Hempel) (Hemiptera: Pseudococcidae) were studied on four citrus (Rutaceae) species (Citrus paradisi, C. limon, C. unshiu, C. sinensis), in an acclimatized room at 25 +/- 2 degrees C, 60-70% relative humidity and 14:10h (1:d) photoperiod. The results suggest that some of the parameters for P cryptus populations were affected by the species of citrus, and that C. limon was the preferred host plant. The population parameters on C. limon were determined as r(m) = 0.1526 d(-1); R-0= 65.8 offspring/individual and T-0 = 27.4 days

Investigations on some biological characters of Pseudococcus cryptus (Hempel) (Hemiptera: Pseudococcidae) on four citrus species

The developmental time, longevity, fecundity, sex ratio, duration of preoviposition, oviposition and postoviposition, number of nymphs and life table parameters of Pseudococcus cryptus (Hempel) (Hemiptera: Pseudococcidae) were studied on four citrus (Rutaceae) species (Citrus paradisi, C. limon, C. unshiu, C. sinensis ), in an acclimatized room at 25±2°C, 60-70% relative humidity and 14:10h (1:d) photoperiod. The results suggest that some of the parameters for P cryptus populations were affected by the species of citrus, and that C. limon was the preferred host plant. The population parameters on C. limon were determined as rm= 0.1526 d-1; R0= 65.8 offspring/individual and T0= 27.4 days

Demographic parameters and biological features of Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) on four ornamental plants

The development, reproduction and life table parameters of the cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) on four ornamental plants (Hibiscus rosa-sinensis L., H. syriacus L. (Malvaceae), Brugmansia aurea Lagerh., Cestrum nocturnum L. (Solanaceae)) were studied at 25 ± 2 °C, 60% ± 10% r.h., and 16 hours daily artificial light. Life table data were analyzed by using an age-stage, two-sex life table. The highest intrinsic rate of increase (0.2911 d-1), finite rate of increase (1.3380 d-1), net reproductive rate (258.0 nymphs/female) and gross reproduction rate (342.6 nymphs/female), as well as the shortest mean generation times (19.1 days) were obtained when the mealybug was reared on H. syriacus. © 2015, Springer Science+Business Media Dordrecht

Laboratory assay of the effectiveness of the entomopathogenic fungus Isaria farinosa (Holmsk.) Fries (Sordariomycetes: Hypocreales) against the vine mealybug Planococcus ficus (Signoret) (Hemiptera: Pseudococcidae), even under the use of fungicides

The vine mealybug, Planococcus ficus (Signoret) (Hemiptera: Pseudococcidae), is one of the main pests in vineyards. At present biological control of the pest is based on the release of hymenopterous parasitoids and coccinellid predators. The effectiveness of an entomopathogenic fungus, Isaria farinosa, as an alternative biological control agent on vine mealybug P. ficus was investigated by using different inoculum densities and different relative humidity levels. The fungus caused more than 80% mortality at 95% relative humidity and at 1 x 10(8) conidia ml(-1) inoculum density. The mortality effects of the fungus decreased in lower humidity levels and lower spore densities. The inhibitory effects of common fungicides, used in vineyards, on I. farinosa were also investigated. Sulphur, copper oxychloride, fosetyl-Al and chlorothalonil did not decrease the effectiveness of I. farinosa as a pathogen of vine mealybug. With the application of tebuconazole, penconazole and mancozeb, the most inhibitory fungicides on the entomopathogen, the mortality rates of mealybugs, inoculated with I. farinosa, decreased from 86% to 42%, 34% and 45%, respectively, in the adult females; from 94% to 51%, 45% and 45%, respectively, in the first nymphal stages; and from 86% to 56%, 49% and 63%, respectively, in ovisacs

Evaluation of contact sensitivity in patients with psoriasis

Objective: Psoriasis is a chronic, immune-mediated,relapsing inflammatory disease which mixed Th1 and Th17 cytokines play role in. Psoriasis can be triggered by physical trauma, contact with chemicals, burns, environmental factors such as ultraviolet and Köbner-ization. This study aimed to determine the contact sensitivity in psoriatic patient and compare from the normal population. Material and Methods: A hundred clinically and/or histopatho-logically diagnosed, other than erithrodermic and pustular types and older than 18 years old psoriatic patients were enrolled into the study. For control group; older than 18 years old, voluntary, without psoriasis and contact dermatitits 100 patients were enrolled. European Standard Series skin patch system, IQ Chamber test materials were applied on unlesional skin of cases in both greoups. Analyses were performed using SPSS for Windows Version 20.0 program. Results: Sixty-one of 100 psoriasis patients, 58 of 100 control group patients were allerjic to at least one allergen. This difference between the groups wasn t found statistically meaningful. There was no correlation between patch tests sensitivity and disease severity, disease or lesion duration or psoriasis types. Statistically meaningful correlation was found between contact sensitivity and genital and upper extremity involvement. Nickel sulfate was the most common allergen in both groups. Conclusion: Although allergic contact sensitivity found in psoriatic group not different from the control group,especially upper extremity and genital involvement,contact sensitivity can play the role in provocation and progression of psoriasis. Copyright © 2018 by Türkiye Klinikleri

Development and Life Table Parameters of Phenacoccus madeirensis Green (Hemiptera: Pseudococcidae) on Four Ornamental Plants

The development, reproduction, and life table parameters of the Phenacoccus madeirensis Green (Hemiptera: Pseudococcidae) on four ornamental plant species, namely Pelargonium zonale (Geraniaceae), Hibiscus rosa-sinensis, Hibicus syriacus (Malvaceae), and Cestrum nocturnum (Solanaceae) were investigated under controlled conditions (25 +/- 2A degrees C, 60 A +/- 10% R.H., and 16 h photophase). Life table data were analyzed by using an age-stage two-sex life table. The shortest total immature developmental time of females and males for P. madeirensis was obtained on C. nocturnum (20.42 and 21.90 days, respectively). The highest fecundities were 233 and 232 eggs on C. nocturnum and H. syriacus, respectively. The intrinsic rate of increase (raEuro dagger aEuro parts per thousand= 0.1511 day(-1)) and finite rate of increase (lambda aEuro dagger aEuro parts per thousand= aEuro dagger 1.1631 day(-1)) were the greatest when mealybugs were reared on C. nocturnum. Net reproductive rate (R (0)aEuro dagger aEuro parts per thousand= aEuro dagger 129.5 offspring) was the greatest when reared on H. syriacus, but this value was not statistically different from that on C. nocturnum. The shortest mean generation time (TaEuro dagger aEuro parts per thousand= aEuro dagger 31.3 days) was calculated on C. nocturnum. These results indicate that C. nocturnum and H. syriacus are more suitable hosts than H. rosa-sinensis and P. zonale for P. madeirensis