EVALUATING THE EFFICIENCY OF DIFFERENT LEVELS OF NEOSEIULUS CALIFORNICUS (MC GREGOR) RELEASED FOR CONTROLLING THE SPIDER MITE TETRANYCHUS URTICAE KOCH AND EUROPEAN RED MITE PANONYCHUS ULNI(KOCH) ON YOUNG APPLE TREES

2010 ◽  
Vol 88 (2) ◽  
pp. 451-463
Author(s):  
GAMAL EL-DIN A. IBRAHIM ◽  
ABDEL-SATAR M. METWALLY ◽  
ASHRAF S. EL-HALAWANY ◽  
KAREM M. EL-SAYED
Keyword(s):  
Tetranychus Urticae ◽  
Spider Mite ◽  
Neoseiulus Californicus ◽  
Apple Trees ◽  
European Red Mite ◽  
Tetranychus Urticae Koch ◽  
Different Levels ◽  
Young Apple

scholarly journals The influence of the two-spotted spider mite (Tetranychus urticae Koch.) and irrigation on yield of 5-years-old apple trees

2013 ◽  
Vol 55 (2) ◽  
pp. 113-119
Author(s):  
Wojciech Warabieda ◽  
Remigiusz W. Olszak
Keyword(s):  
Tetranychus Urticae ◽  
Spider Mite ◽  
Fruit Weight ◽  
Economic Injury Level ◽  
Apple Trees ◽  
Economic Injury ◽  
Apple Cultivars ◽  
Effect On Yield ◽  
Two Spotted Spider Mite ◽  
Tetranychus Urticae Koch

The influence of the two-spotted spider mite (<i>Tetranychus urticae</i>) on yield of apple trees was investigated. The experiment was conducted on rrigated and non-irrigated 5-years-old apple trees of 'Close' and 'Jonagold' cultivars grafted on M.9. The population size of the pest exceeded four and two times the valid (in Poland) economic injury level on trees of 'Close' and 'Jonagold' cultivars respectively. No significant influence of mites on yield and its quality (mean fruit weight and fruit colour) was observed on both apple cultivars. Irrigation had positive effect on yield and quality of 'Jonagold'. On the contrary, trees of ' Close' cultivar were positively influenced by irrigation only regarding fruits colour. Results of the study support opinion that the economic injury level for apple orchards, with respect to two-spotted spider mite, should be higher than it is up to now.

scholarly journals Differential toxicity and resistance of the spider mite Tetranychus urticae and the predator Neoseiulus californicus to the acaricides cyflumetofen and diafenthiuron

2020 ◽  
Author(s):  
◽  
Jéssica Fernanda Marçal
Keyword(s):  
Tetranychus Urticae ◽  
Spider Mite ◽  
Sao Paulo ◽  
Neoseiulus Californicus ◽  
São Paulo ◽  
Differential Toxicity ◽  
Tetranychus Urticae Koch

A cadeia produtiva de flores e plantas ornamentais e de grande importancia socioeconomica no Brasil, com destaque para o estado de Sao Paulo. A roseira tem importante participacao neste setor e em seu cultivo o ataque de insetos e acaros-pragas e frequente, com destaque o acaro-rajado, Tetranychus urticae Koch (Acari: Tetranychidae), que pode afetar a producao e a qualidade das flores produzidas. O acaro predador Neoseiulus californicus (McGregor) (Acari: Phytoseiidae) tem sido utilizado no Brasil para o controle biologico de acaros tetraniquideos em diversas culturas, incluindo morangueiro e roseiras. A pesquisa foi conduzida com os objetivos de: 1) avaliar o potencial de evolucao da resistencia e a estabilidade da resistencia, aos acaricidas diafentiurom e ciflumetofem, em populacoes de T. urticae, encontradas em cultivos comerciais de roseiras no estado de Sao Paulo; 2) estudar os mecanismos bioquimicos (enzimas metabolicas) associados a resistencia de T. urticae e N.

scholarly journals The predatory mite Neoseiulus californicus (Acari: Phytoseiidae) does not respond for volatiles of maize infested by Tetranychus urticae (Acari: Tetranychidae)

2022 ◽  
Vol 82 ◽  
Author(s):  
M. S. Rocha ◽  
P. T. Nascimento ◽  
B. L. F. Santos ◽  
M. A. M. Fadini
Keyword(s):  
Tetranychus Urticae ◽  
Natural Enemies ◽  
Defense Mechanisms ◽  
Spider Mite ◽  
Predatory Mite ◽  
Neoseiulus Californicus ◽  
Volatile Organic ◽  
Maize Plants ◽  
Two Spotted Spider Mite ◽  
Tetranychus Urticae Koch

Abstract Among the plants defense mechanisms, the induction and emission of volatile organic compounds, which can be used to attract natural enemies, such predators insects. Although well studied, the induction of plant volatiles that attract natural enemies can vary according to intensity of infestation of herbivores and the species of host plant. We investigated the olfactory behavioral responses of the predatory mite Neoseiulus californicus (McGregor) (Acari: Phytoseiidae) to the volatiles of infested maize (Zea mays) plants by the two-spotted spider mite Tetranychus urticae (Koch, 1836) (Acari: Tetranychidae) in early and advanced infestations. The Bt (Viptera) maize cultivar Impact® was used for tests the behavior of N. californicus. After initial and advanced infestations, the phytophagous mites T. urticae were removed, and the plants were tested using a “Y” olfactometer. The following treatments were evaluated: air vs. air, uninfested plants vs. air, uninfested plants vs. plants infested with 10 females of T. urticae, uninfested plants vs. plants infested with 100 females of T. urticae, uninfested plants vs. plants infested with 200 females of T. urticae and plants infested with 10 vs. plants infested with 200 females of T. urticae. The predatory mite N. californicus did not show preference to the treatments tested, suggesting that maize plants infested by T. urticae do not induce volatiles capable of attracting the predatory mite N. californicus. We concluded that N. californicus is not attracted by maize plants infested by T. urticae.

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