E. Asieduet al. Temperature Requirements of Some Aphids and Their Parasites, Mealybugs of California with Taxonomy, Biology and Control of North American Species (Homoptera: Coccoidea: Pseudococcidae), fruit pest biology and their biological a control. 0000012590 00000 n Second year’s population was similar to the first year but it was lower than the first year. The developmental time of female parasitoids within Growth inhibition indexes of same larvae groups were 0.64, 0.17, 0.65 and 0.80, respectively. Since few mealybugs developed to oviposition at 30°C, their higher developmental thresholds are around this temperature. The majority of species identified in the study was determined from citrus gardens in the Aegean region. Studies have been conducted on development of alternative control methods for the pest which is rather difficult to chemically control. h�b```f``#�4��3�0pLq`��`���1`�*�tNQ��,�}�G�Bi��9Y��� Population levels of prey and predators were monitored for two years, with weekly intervals between May-October and one time for two weeks between December and April of the following year. �X��D�������V�J[�x]�s�]@e���ᤵ���K9M �s���&�����LJ P���+:::��!s��3������Hk �;XD�A����a��^���!��k�F�u � All the nymphs were observed daily till all individuals became death. 0000424141 00000 n 0000422785 00000 n Population fluctations of Citrus mealybug [Planococcus citri (Risso) (Hemiptera: Pseudococcidae)] in... Effect of temperature on some biological parameters of Binodoxys angelicae (Haliday) (Hym. .The predators which was, This study has been conducted for monitoring the population of Citrus mealybugs in Eastern Mediterranean Region of Turkey between 2013-2015. mealybugs. All individuals in chlorantraniliprole+abamectin-, emamectin benzoate-and spinosad-treated larvae were died at the 7 DAA. Therefore, one tried to find out if different cultivars could have any effects with the conclusion that L. botrana had to be kept under control by environmentally friendly IPM programs. males, this time was 6.40±0.83 and 7.10±0.74 days, respectively. The number of mealybug individuals was too low in winter, the low population has lasted until February 2014 in the second year of this study. All rights reserved. Second year‟s population was similar to the first year but it was lower than the first year. The first nymph stage lasted 7.86 d for females, and 8.1 d for males at 25°C. h�bb�e`b``Ń3Υ�� ��+ The longest duration for the second nymph stage was obtained at 15°C with 25.7 and 22.5 d for females and males, respectively. During the survey, parasitoids obtained from the mummified citrus mealybug in the citrus orchards were identified as 4 species belonging to the family Encyrtidae from Hymenoptera. The developmental time, survival rate and reproduction of the cabbage aphid, Brevicoryne brassicae (L.) (Homoptera, Aphididae), were evaluated on detached cabbage leaves (Brassicae oleracea var. 0000405489 00000 n Temperature-Dependent Developmental Rate of Three Mealybug Species, Pseudococcus citriculus GREEN, Planococcus citri(RISSO), and Planococcus kraunhiae(KUWANA)(Homoptera: Pseudococcidae) on Citrus. days old (young adult females) of N. viridis. The study investigated some bioecological characteristics, such as, development time, duration of biological stages, sex ratio, daily and total fecundity per female, and longevity of P. citri, under different temperature regimes during 2015-2016 in Citrus Pest Laboratory at Çukurova University. Because it is based on female age-specific life table and due to the problems of applying female life table to two-sex populations (Huang and Chi 2012), it is not justified to compare the results of, ... Other economic pests include citrus red mite, citrus rust mite, citrus bud mite, carob moth, honeydew moth, citrus leafminer, aphids, citrus whitefly, and cottony cushion scale. some biological parameters of the encyrtid wasp Anagyrus mirzai Agarwal & Alam, 1959, population of 10 eggs. Percent infestation rate of mealybug was determined on random samples of 5 fruits per tree, examining presence or absence of mealybug, i.e. The All the experiments were done on 3-5 cm diameter fruit of Okitsu Wase (mandarin), Interdonata (lemon), Washington navel (orange) and Star Ruby (grapefruit) citrus varieties which are covered by branch cage. The obtained adults were prepared in accordance with their methods and sent to subject experts and diagnosed. 0000009626 00000 n 0000478664 00000 n The mean polyphgous pest on many plants around the world including the grapevine. mealybugs was 38.60% and 43.90% in 24 d.o. Paralleling to this significant increase, abundance of indigenous pest populations and introduction of exotic pests are also increasing dramatically. 0000422628 00000 n The seasonal development of nymphs and adult females of P. citriculus predicted using temperatures at Okitsu Branch, Fruit Tree Research Station from 1993 to 1994 matched the actual seasonal occurrence of the mealybug in a citrus orchard in those years. The lower developmental threshold temperatures (To) and thermal constants (K) in the entire nymphal stage were 11.7°C and 338 degree-days (DD) for P. citriculus, 7.7°C and 401 DD for P. citri, and 8.0°C and 519 DD for P. kraunhiae. H�\��j�@��}��l/��Yg�@HZ���94�����*s������� (1) The temperature requirements of some aphids differ from place to place for the same species and from species to species. For When P. citri population reached the peak level, approximately 500 S. pygmaues individuals were released to each orchard. For this reason, the population dynamic of P. citri and its predator, Sympherobius pygmaeus (Rambur) (Neuroptera: Hemerobiidae) in three different grapefruit orchards were studied. This study was conducted to evaluate efficiency of biological and chemical control methods against citrus mealybug, Planococcus citri Risso (Hemiptera:Pseudococcidae), caused important economic losses in the east Mediterranean region of Turkey. It feeds on fruits and twigs of citrus by sucking the sap and causes dark-colored sooty mold and fugacity. However, none of the larvae treated with other insecticides could show the success of adult emergence. Daily mean average temperature and relative humidity were recorded as 28.5 and 67.9% R.H. by data logger. Biological control agents were sampled by a strike technique. The optimal range of temperature for the population growth of B. brassicae on white cabbage was 20 to 25/30 °C. xref 0000004775 00000 n Citrus mealybug population on fruit reached to fırst peak point on June 19, second peak point on July 20, third peak point on August 21, and last peak point on September 19 in Sarıçam. Hatching rate of eggs and mortality rates in different biological stages of Planococcus citri on grapefruit leaves under different temperature regimes, . serious pest of citrus and other cultural and non-cultural plants in tropical and sub-tropical regions (Hymenoptera: Encyrtidae) were applied under grower conditions against mealybug.
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