Résumés
Summary
A three-season field evaluation showed that eggplants (Solanum melongena) are very tolerant to damage caused by the two-spotted spider mite, Tetranychus urticae. Although large numbers of the predacious mites, Neoseiulus fallacis or Phytoseiulus persimilis were released, biological control of the two-spotted spider mite could not be sustained in the field. Based on a preliminary comparison of yield in both sprayed and unsprayed plots and on a three-year qualitative assessment, a tentative action threshold of 600 two-spotted spider mites per leaf would not decrease yield and would reduce the number of acaricide treatments per season. The new acaricide spirodiclofen was effective against the two-spotted spider mite in a preliminary trial.
Résumé
Une évaluation sur trois saisons a démontré que l’aubergine (Solanum melongena) est très tolérante au tétranyque à deux points, Tetranychus urticae. Malgré le grand nombre d’acariens prédateurs, Neoseiulus fallacis ou Phytoseiulus persimilis, relâchés au champ, la lutte biologique contre le ravageur n’a pu être maintenue au champ. Basé sur une évaluation préliminaire de la récolte dans les parcelles traitées et non traitées et sur une évaluation qualitative de trois années, un seuil provisoire de traitement de 600 tétranyques à deux points par feuille réduirait le nombre de traitements contre ce ravageur sans affecter la récolte. Le nouvel acaricide spirodiclofen a été efficace contre le tétranyque à deux points dans un essai préliminaire.
Parties annexes
References
- Anonymous. 1992. Légumes en terre minérale. C.R.E.A.Q. Agdex 250/821. MAPAQ, Quebec (Quebec). 43 pp.
- Anonymous. 2001. Avertissement : Cucurbitacées-Solanacées. Réseau d’avertissements phytosanitaires. No 7, 29 June 2001, MAPAQ, Quebec (Quebec). 6 pp.
- Bostanian, N.J., and L.J. Coulombe. 1986. An integrated pest management program for apple orchards in southwestern Quebec. Can. Entomol. 118 : 1131-1142.
- Bostanian, N.J., and G. Racette. 2002. Evaluation of BAY BAJ 2740 240 SC to manage phytophagous mites in apple orchards 1999, 2000 and 2001. Arthropod Manag. Tests 27 : Reports # A6, A7 and A8.
- Bostanian, N.J., R.O. Paradis, and D. Pitre. 1981. Susceptibility of phytophagous mites to a single summer treatment of acaricides in a Quebec apple orchard. Phytoprotection 62 : 33-38.
- Chermiti, B. 1991. Lutte biologique : 1-. Essai d’utilisation de Phytoseiulus persimilis Athias-Henriot (Acarina, Phytoseiidae) contre Tetranychus urticae Koch (Acarina, Tetranychidae) sur une culture protégée d’aubergine. Bull. O.I.L.B./S.R.O.P. Lutte intégrée en cultures protégées-climat méditerranéen. Allasio, Italy. Pages 134-139.
- Chung, B.K., S.W. Kang, and J.H. Kwon. 2000. Chemical control system of Frankliniella occidentalis (Thysanoptera: Thripidae) in greenhouse eggplant. J. Asia-Pacific Entomol. 3 : 1-9.
- Fischer, R., and J. Benet-Buchholz. 2002. Chemistry and stereochemistry of spiro-diclofen (BAJ 2740). Pages 137-148 in M. Esters (ed.), Pflanzenschutz Nachrichten Bayer. Decker Druck, Leverkusen, Germany.
- Henderson, C.F., and H.V. McBurnie. 1943. Sampling technique for determining populations of the citrus red mite and its predators. U.S. Dep. Agric. Circ. 671.
- Ho, C.C., and W.H. Chen. 1996. Improvement on the chemical control of spider mites of eggplant. J. Agric. Res. China 45 : 285-296.
- Nemoto, H. 1995. Pest management systems for eggplant arthropods: a plan to control pest resurgence resulting from the destruction of natural enemies. Jpn Agric. Res. Q. 29 : 25-29.
- Papadaki, M.E., T.J. Fitsakis, and E.C. Kozirakis. 1985. Integrated control of greenhouse whitefly and the red spider mite in Crete. Bull. O.I.L.B./S.R.O.P. Integrated control in protected crops. Catania, Italy. Pages 19-26.
- Patel, C.B., A.H. Shah, and S.H. Patel. 1982. Effect of insecticides on the resurgence of two-spotted spider mites, Tetranychus telarius Linn., in brinjal. Indian J. Agric. Sci. 52 : 774-776.
- Pratt, P.D., and B.A. Croft. 2000. Overwintering and comparative sampling of Neoseiulus fallacis (Acari: Phytoseiidae) on ornamental nursery plants. Environ. Entomol. 29 : 1034-1040.
- Rock, G.D., and R.R. Yeargan. 1970. Relative toxicity of plictran to the European red mite, the two-spotted spider mite and the predaceous mite Neoseiulus (Typhlodromus)fallacis (family: Phytoseiidae). Down Earth 26 : 1-4.
- Sharaf, N.S. 1984. Studies on natural enemies of Tetranychid mites infesting eggplant in the Jordan valley. Z. Angew. Entomol. 98 : 527-533.
- Tanigoshi, L.K., S.C. Hoyt, and B.A. Croft. 1983. Basic biology and management components for mite pests and their natural enemies. Pages 153-202 in B.A. Croft and S.C. Hoyt (eds), Integrated management of insect pests of pome and stone fruits. John Wiley & Sons, NY.