COMPARISON STUDIES ON THE POPULATION DYNAMIC OF Panonychus citri (MCGREGOR) INHABITING CITRUS TREES AT ASSUIT AND KAFR EL-SHEIKH GOVERNORATES

Panonychus cirri (MacGregor) one of the most important phytophagous mites in many parts of the world, has been collected from citrus trees in various localities of county Preveza, Heperos, Greece. This mite has been, possibly, introduced to Greece via Albania. Another phytophagous mite, Eriophyes medicaginis Keifer, well known to cause witches’ broom on alfalfa, has been collected from Medicago saliva L. in the counties Attiki and Boiotia of central Greece. In a two year study on arthropods associated with alfalfa at the Kopafs region of Boiotia, E. medicaginis was found to be constant and recedent in both years. High population densities were observed during the period mid-September to mid-March.

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Acaricidal effect of several commercial agrochemicals on two spider mite species, Eutetranychus africanus and Panonychus citri (Acari: Tetranychidae), infesting citrus trees in Okinawa, southwestern Japan.

Kyushu Plant Protection Research ◽

10.4241/kyubyochu.57.72 ◽

2011 ◽

Vol 57 ◽

pp. 72-76

Author(s):

Suguru Ohno ◽

Miki Kurima ◽

Tomoko Ganaha-Kikumura ◽

Keisuke Kijima

Keyword(s):

Spider Mite ◽

Mite Species ◽

Panonychus Citri ◽

Citrus Trees

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Photosynthetic responses of citrus trees to soil flooding

Physiologia Plantarum ◽

10.1034/j.1399-3054.1991.810102.x ◽

1991 ◽

Vol 81 (1) ◽

pp. 7-14 ◽

Cited By ~ 4

Author(s):

Joseph C. V. Vu ◽

George Yelenosky

Keyword(s):

Soil Flooding ◽

Photosynthetic Responses ◽

Citrus Trees

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2016 Planting and Annual Cultural Maintenance Costs for Reset-Replacement Trees in a Florida Citrus Grove

EDIS ◽

10.32473/edis-fe995-2016 ◽

2016 ◽

Vol 2016 (7) ◽

Author(s):

Marina Burani Arouca ◽

Stephen Hubbard Futch ◽

Ariel Singerman

Keyword(s):

Citrus Grove ◽

Maintenance Costs ◽

Cultural Maintenance ◽

Florida Citrus ◽

Citrus Trees

We provide estimates for the costs of planting and maintaining reset citrus trees in Florida in the era of HLB, The estimates are useful as a benchmark but also to inform industry stakeholders and policymakers regarding the costs growers have to incur in when planting new trees.

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Studies on the cold injury of citrus trees. V.

Engei Gakkai zasshi ◽

10.2503/jjshs.35.106 ◽

1966 ◽

Vol 35 (2) ◽

pp. 106-110

Author(s):

F. YOSHIMURA ◽

K. KATO ◽

H. MASUDA

Keyword(s):

Cold Injury ◽

Citrus Trees

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The social wasp Vespula germanica (Fabricius) (Hymenoptera: Vespidae) population dynamics in England over 39 years.

The Entomologist s monthly magazine ◽

10.31184/m00138908.1542.3906 ◽

2018 ◽

Vol 154 (2) ◽

pp. 149-155

Author(s):

Michael Archer

Keyword(s):

Population Dynamics ◽

Population Dynamic ◽

Ecological Factors ◽

Social Wasp ◽

Data Sets ◽

Data Set ◽

Vespula Germanica ◽

The Social ◽

Minimum Number ◽

Suction Traps

1. Yearly records of worker Vespula germanica (Fabricius) taken in suction traps at Silwood Park (28 years) and at Rothamsted Research (39 years) are examined. 2. Using the autocorrelation function (ACF), a significant negative 1-year lag followed by a lesser non-significant positive 2-year lag was found in all, or parts of, each data set, indicating an underlying population dynamic of a 2-year cycle with a damped waveform. 3. The minimum number of years before the 2-year cycle with damped waveform was shown varied between 17 and 26, or was not found in some data sets. 4. Ecological factors delaying or preventing the occurrence of the 2-year cycle are considered.

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