Ecological and taxonomic studies on the scale insects that infest mango trees at Qaliobiya governorate

Population fluctuations of the white mango scale insect, Aulacaspis tubercularis, Newstead, (Coccoidea: Diaspididae) had been studied in mango orchards located at two governorates, (Damietta and Gharbya) in the northern of Egyp during 2010. The obtained data revealed that A. tubercularis recorded three peaks at Damietta governorate; these peaks were recorded during February, June and August 2010 when 35.5, 39.1 and 127.1 individuals/leaf were recorded, respectively. At Gharbyia governorate two peaks during April 2010, (48.9 individuals/leaf) and July 2010, (32.6 individuals/leaf).The variables of temperature and relative humidity had slight effects on A. tubercularis population. On the other hand, A. tubercularis preferred south direction than the other cardinal directions (north, east and west) and center of mango tree canopy. Also, this pest preferred the upper surface of leaves during cold month (winter months) and preferred the lower surface of leaves during the hot months (summer months). The sex ratio had been recorded as 34.6:1 (male: females) at Damietta district, while, at Gharbayia governorate, it had been recorded as 20.5:1.

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“…insects on mango trees. It recorded 27.5% of the scale insects on mango trees at Qaliobiya governorate (Bakr et al, 2009).…”

mentioning

confidence: 99%

Studies on the population fluctuations and distribution of the white mango scale insect, Aulacaspis tubercularis Newstead within the canopy of the mango trees in eastern of Delta region at the north of Egypt

El-Metwally

Moussa

Ghanim

2011

Egyptian Academic Journal of Biological Sciences. A, Entomology

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“…(Helmy et al 2001;El-Sobky, 2006;Hariss et al 2006 andEl-Sahn, 2007). Finally, for increasing crop production of this popular fruit, agriculture precautions (Baker, 2009) must be applied; The organophosphorus compounds must be replaced ( due to its high systemic toxicity ) by these other friendly alternatives during pest control management, the right time must be considered; the success occurred in the last century through releasing R. cardinalis for controlling mealy bugs (Tawfik, 1993) can be repeated during Jun (Hendawy, 1999 andEl Serafi et al 2004…”

Section: -The Winter Evaluationmentioning

confidence: 99%

“…Scale insect ( Hemiptera: Coccoidea) styles branched up to three times in the sheath to reach the phloem (intracellular or intercellular), likely come into contact with the secondary metabolites in vacuoles; leaves are first penetrated, in high temperature, the crawlers move to the aerial portions, settled on buds, causing dangerous loss (annual loss by pink hibiscus mealybug only in Grenado Island was 3.5 million dollars before establishing the biological control), especially through their toxic saliva, secondary infection and associated insects (Newberg et al 1983 andBaker et al, 2009). Most scales are sensitive to the meteorological changes, agriculture activities and host preferable, so updated survey was required after the previous survey of El Minshawy et al (1974) in Alexandria.…”

Section: Introductionmentioning

confidence: 99%

Scale insects infesting guava trees and control measure of Pulvinaria psidii (Hemiptera: Coccidae) by using the alternative insecticides.

Bakr

Mousa

Hamouda

et al. 2012

Egyptian Academic Journal of Biological Sciences. A, Entomology

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Nine scale insect species (Hemiptera: Coccoidea) belongs to four families were collected during updated survey at Qaliobiya Governorate for two successive years. A key with photographs and illustrations are introduced; the seasonal fluctuation and the population density of all stages of the most serious soft scale insect, Pulvinaria psidii Maskell (Hemiptera: Coccidae) were studied in relation to five main weather factors. Three predators, Rodalia cardinalis Mulsant, Chilocorus bipustulatus L. (Coleoptera: Coccinellidae) and Amblyserius swiriskii (Athias-Henriot) (Acari: Phytoseiidae) were collected associated with P. psidii and their effect with the other meteorological factors are analyzed statistically using partial regression method to decide their contemporary effect. The half monthly variation was calculated and the number of generations of this soft scale per year were estimated throughout the two successive years of investigation to indicate the high infestation of this pest to reach 327 insect/ leaf at 1 st may, the lowest population density were during winter season. The efficacy of the alternative pesticides (Biological insecticides, mineral oils, IGRs) and organophosphorus insecticides for controlling this serious pest different stages during summer and winter field sprayings were applied to insure that: the summer spray was more effective than the winter spray, the mineral oils and soap gave high efficacy after two weeks of spraying and still increasing till the end of the experiment, without observed phytotoxicity; IGRs and biological insecticides started to give good efficacy after one month of spraying and also still to increase till the end, in addition to their safety effect, opposite to the synthetic insecticides that gave a very good efficacy at the beginning of the experiment and decreased gradually. Finely the application time is very important; the organophosphorus compounds must be replaced by these other friendly alternatives; rearing and releasing these predators must be used in this pest control management.

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“…Scale insects are the major pests infesting apple, apricot and pear orchards in Egypt. Abd-Rabou (2003) and Bakr et al (2009) reviewed the scale insects infested different crops in Egypt. Scale insects feed on plant sap.…”

Section: Introductionmentioning

confidence: 99%

Scale insects (Hemiptera: Coccoidea) infesting apple, apricot, pear trees and their abundant parasitoids in Egypt

Abd-Rabou

Ahmed

Badary

2012

Egyptian Academic Journal of Biological Sciences. A, Entomology

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Scale insects are the major pests infesting apple, apricot and pear trees in Egypt. The aim of the present work is to study a survey of scale insects infesting apple, apricot, pear trees and their abundant parasitoids in Egypt. A survey of scale insects infested apple, apricot, pear trees and their abundant parasitoids were carried out all over Egypt during 2009-2011. The results indicated that apple, apricot and pear trees were infested by 19, 10 and 10 scale insect species and associated with 12,6 and 8 parasitoid species, respectively.

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Ecological and taxonomic studies on the scale insects that infest mango trees at Qaliobiya governorate

Cited by 14 publications

References 1 publication

Studies on the population fluctuations and distribution of the white mango scale insect, Aulacaspis tubercularis Newstead within the canopy of the mango trees in eastern of Delta region at the north of Egypt

Studies on the population fluctuations and distribution of the white mango scale insect, Aulacaspis tubercularis Newstead within the canopy of the mango trees in eastern of Delta region at the north of Egypt

Scale insects infesting guava trees and control measure of Pulvinaria psidii (Hemiptera: Coccidae) by using the alternative insecticides.

Scale insects (Hemiptera: Coccoidea) infesting apple, apricot, pear trees and their abundant parasitoids in Egypt

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