Studies on the occurrence of true spiders as natural enemies in many Egyptian fields

Ibrahim, Amira A.; Shairra, Souad; Elmahdi, Iman F. S.

doi:10.1016/j.jobaz.2011.10.001

Cited by 4 publications

(8 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the present study, T. urticae as the only consumed food could not maintain the life of the female adult spider except for few days (2.9-8 days) or enable the early 3 spiderlings to complete the life cycle to adult stage which is similar to findings of Ibrahim et al (2012). On the other hand El-Erksousy (2000) succeeded to complete the life cycle of the spiderlings of the Theridiid Crustulina conspicua (5-6 spiderlings) by feeding the predator on huge numbers of adult T. urticae (about 1822 & 2453 mites for male & female spiderlings).…”

Section: Life Stage Duration Food Consumption and Predation Rate Of supporting

confidence: 74%

“…The present study showed that Thomisidae was the most abundant family on cotton during the period of study followed by Salticidae, Theridiidae, Philodromidae, Araneidae, Eutichuridae (Miturgidae), Dictynidae, Linyphiidae, and Gnaphosidae. In Egypt, occurrence of spiders on cotton has been recorded in many governorates and localities (El-Heneidy et al, 1996;El-Erksousy, 2000;Abo-zaed, 2008;Ibrahim et al, 2012). Furthermore, many of the spider families on cotton in the present work were collected from other plants such as vegetables (Gabboiur et al, 1996;Soliman, 2003) fruits (Metwally et al, 2002) and field crops (Ibrahim et al, 2012).…”

Section: Spider Families Associated With Tetranychus Urticae On Clovementioning

confidence: 54%

“…Ecological and biological studies have been carried out on spiders in Egypt (e.g. El-Heneidy et al, 1996;Metwally et al, 2002;Abo-zaed, 2008;Ibrahim et al, 2012). However, studies on spiders associated with T. urticae or other acarine pests are scarce (El-Erksousy, 2000).…”

Section: Spider Families Associated With Tetranychus Urticae On Clovementioning

confidence: 99%

“…Spiders are considered to be one of the most important predators which can be used as biological control agents regulating populations of mites, insects and other important agricultural pests by feeding on all life stages of the prey (Nyffler et al, 1994;El-Naggar et al,1999;El-Erksousy et al, 2002;Ibrahim et al 2012). In Egypt, biological, ecological and taxonomical studies concerning spiders as predators of the spider mites have not yet been adequate to determine which species can be used as a biological control agent of the two spotted spider mite, Tetranychus urticae (Hussein et al, 1998;El-Naggar et al, 1999;El-Erksousy, 2000).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Predatory Spiders Associated with the Two Spotted Spider Mite Tetranychus urticae on Two Field Crops in Qalubyia Governorate, Egypt

El-Erksousy

Helmy

Abo-zaed

et al. 2016

Egyptian Academic Journal of Biological Sciences. A, Entomology

View full text Add to dashboard Cite

Entomology Journal publishes original research papers and reviews from any entomological discipline or from directly allied fields in ecology, behavioral biology, Five hundred and fifty eight spiders belonging to 11 families of order Araneae were associated with T. urticae and collected on clover and cotton crops at Qaha research station in Qalubyia governorate, Egypt during two successive years, 2013 and 2014. During the period of study, Salticidae was the most abundant of the collected spider followed by Theridiidae, Thomisidae, Philodromidae, Dictynidae, Eutichuridae (Miturgidae), Araneidae, Linyphiidae, Lycosidae, Agelenidae, and Gnaphosidae. The number of the collected spiders, families and percent occurrence of each family varied on the studied crops in different seasons. On clover, the collected families did not include Gnaphosidae in both years of study in addition to Araneidae in 2013 and Lycosidae, Philodromidae and Agelenidae in 2014. On cotton, Lycosidae and Agelenidae were not collected in both years in addition to Gnaphosidae in 2014.Changes of population densities of the monthly collected spiders and their prey, T. urticae, ran nearly in parallel during the whole seasons of cotton with peak in September and up till the prey peak on clover in March. Although the population of T. urticae decreased in the next months following the peak on clover, the spiders continued increasing to reach their peak in May 2013 and 2014. The total number of collected spider's movable stages was higher in 2013 than 2014 on each crop and on cotton than clover in each year of study. On the other hand, the total number of T. urticae collected was higher in 2014 than 2013 on each crop and on clover than cotton in each year of study.Laboratory studies on life stage duration, food consumption and predation rate of early immatures and adult female of Thanatus albini, Steatoda triangulosa and Thomisus spinifer (family Philodromidae, Theridiidae, Thomisidae, respectively), showed the efficacy of the three selected spider species as predators on adult Tetranychus urticae. Immatures and adult females of the studied spiders consumed more and lived longer when fed on females than males of T. urticae. In immature spiders, the number of consumed prey/spider, the daily predation rate and mostly the stage duration (except S. triangulosa) gradually increased by increasing age from the first to third spiderling. In female adult spiders, the 3 parameters, except predation rates of Thomisus spinifer, were the highest in female T. albini, followed by T. spinifer then S. triangulosa. The significance of the obtained result was discussed.

show abstract

Section: Life Stage Duration Food Consumption and Predation Rate Of supporting

confidence: 74%

Section: Spider Families Associated With Tetranychus Urticae On Clovementioning

confidence: 54%

Section: Spider Families Associated With Tetranychus Urticae On Clovementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Predatory Spiders Associated with the Two Spotted Spider Mite Tetranychus urticae on Two Field Crops in Qalubyia Governorate, Egypt

El-Erksousy

Helmy

Abo-zaed

et al. 2016

Egyptian Academic Journal of Biological Sciences. A, Entomology

View full text Add to dashboard Cite

show abstract

“…Aphids are a group of the most injurious insect pests of legumes and cereals in Egypt (Ismail et al, 1993 andAli et al, 2013), sucking the plant nutrients, exuding the harmful honeydew and transmitting diseases to the plant crop leading to a reduction of its yield (El-Defrawi et al,2000;Ali,2004 andSwaminathan et al, 2016). Spiders have been considered as potential polyphagous predators which can be used as biological control agents suppressing and regulating (Riechert, 1974;Mansour and Heiewbach, 1993;El-Naggar et al,1999) population of insects and other agricultural pests by feeding as long-lived robust adults and immatures (Agnew and Smith, 1989) on all life stages of the prey (Nyffeler et al, 1994 andIbrahim et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature and Prey Quality on Aphid-Predator Interrelations in Two Spiders Associated with Aphids on Legumes and Cereal Crops in Egypt

Ibraheem

Shanbaky

Helmy

et al. 2021

Egyptian Academic Journal of Biological Sciences. A, Entomology

View full text Add to dashboard Cite

Occurrence and Abundance of Spiders in Various Agricultural Formations at Sohag Governorate, Egypt

El-Gepaly

Sallam

Mohamed

et al. 2018

Acarines: Journal of the Egyptian Society of Acarology

View full text Add to dashboard Cite

An update of the spider species associated with the most cultivated crops in Shandaweel district, Sohag Governorate, Egypt, with a focus on spider's incidence in dominant and stable habitats in the district; weeds, hlafa grass, citrus trees and ornamental plants during 2016 and 2017 years were illustrated. 18 families, 27 genera and 21 species were identified from 951 individuals (471 males & 480 females) and 2057 immature with total numbers of 3003 individuals during the study period. Salticidae, Cheiracanthiidae and Dictynidae families were the most dominant with frequency percentage of 38.86%, 11.52 % and 10.86 % respectively. Some families identified to genus or family level only like Oecobiidae, Oxyopidae, Pisauridae and Tetragnathidae. This study was also conducted to estimate the population fluctuation of spider families in Sohag Governorate over the two successive years, 2016 and 2017. The spider families reached the highest peaks on weeds in

show abstract

Studies on the occurrence of true spiders as natural enemies in many Egyptian fields

Cited by 4 publications

References 1 publication

Predatory Spiders Associated with the Two Spotted Spider Mite Tetranychus urticae on Two Field Crops in Qalubyia Governorate, Egypt

Predatory Spiders Associated with the Two Spotted Spider Mite Tetranychus urticae on Two Field Crops in Qalubyia Governorate, Egypt

Effect of Temperature and Prey Quality on Aphid-Predator Interrelations in Two Spiders Associated with Aphids on Legumes and Cereal Crops in Egypt

Occurrence and Abundance of Spiders in Various Agricultural Formations at Sohag Governorate, Egypt

Contact Info

Product

Resources

About