Vol.12_No.2 - Pesticide Alternatives Lab - Michigan State University

Spring 2003 Resistant Pest Management Newsletter Vol. 12, No.2regulate the use of insecticides by farmers. Educationof farmers and formulation of guidelines and strictcompliance can prove very useful in this direction.Based on bioassays of these compounds withDBM populations from different locations in the state,LC50s of 0.0001%, 0.00003%, and 0.0051%, forfipronil, indoxacarb, and diafenthiuron respectively,have been worked out. The baseline susceptibility datawill be very useful for monitoring of susceptibilitystatus of DBM to these insecticides in the future andmay help in early detection of resistance developmentin the pest to these compounds.ACKNOWLEDGEMENTS The present studies wereconducted under the research scheme "Insecticideresistance management in diamondback moth, Plutellaxylostella (L.) on cole crops." The authors are thankfulto the Indian Council of Agricultural Research, NewDelhi for funding the same. The authors gratefullythank Professor and Head, Department of Entomology,PAU Ludhiana for providing the necessary facilitiesand research associates and other staff for helping tocarry out various experiments during the course of thepresent studies.REFERENCES1 Argentine J.A., Jansson RK, Halliday WR, Rugg D and Jany CS 2002.Potency, spectrum and residual activity of four new insecticidesunder glasshouse conditions. Florida Entomologist 85(4): 552- 5622 Chawla R.P. and Joia B.S. 1992. Studies on the development ofresistance in diamondback moth (Plutella xylostella L.) toquinalphos in Punjab. J. Insect Sci. 5: 106-108.3 Finney, D.J. 1971. Probit Analysis: A Statistical Treatment of theSigmoid Response Curve. Cambridge University Press, Cambridge,333 p4 Georghiou G.P. 1990. Overview of insecticide resistance. P 19-41. InM.B. Green, H.M. LeBaron and W.K.K. MoBerg (eds). ManagingResistance to Agrochemicals. From Fundamental Research toPractical Strategies, ACS, Washington, DC, USA,5 Hama H. 1989 Characteristic of development of pyrethroid resistance indiamond back moth. Bull. Chugoko Ntl Agril. Expt Station 1989, 4:119-139.6 Joia B.S., Udeaan A.S. and Chawla R.P. 1996. Toxicity of cartaphydrochloride and other insecticides to multi-resistant strains of thediamondback moth, in Plutella xylostella Internat Pest Contr 38:258-597 Krishnamoorthy A. 2002. Biological control of Plutella xylostella (L.),an Indian scenario with referecne to past and future strategies.http://dbm.2002.cirad.fr/papers/krishnamorthy.doc8 Lancaster R and Burt J. 2001. Cauliflower production in WesternAustralia, Bulletin 4521.http://www.agric.wa.gov.au/agency/pubns/bulletin/bull4521/bull4521.pdf9 Mau RFL and Gusukuma-Minuto L 1999. Development of sustainablemanagement program for diamondback moth on cruciferous cropsin Hawaii. Workshop of a integrated pest management of colecrops. I. Insecticide evaluation. Proceedings of the InternationalWorkshop on Integrated Management of Cole Crops. University deCelaya, Guanjuato, Mexico, May 20-21, 1999, pp. 13-23.10 Mau RFL and Gusukuma-Minuto L 2002. Diamnondback mothresistance to spinosad (Success and Tracer, Dow AgroSciences) inHawaii: Confirmation, review of causal factors, and establishmentof a mitigation plan. http://www.inifap-gto.net/Ronaldo.PDF1111 Mehrotra K.N. and Phokela A. 2000. Insecticide resistance in insectpests: Current status and future strategies. In (eds) G.S. Dhaliwaland Balwinder Singh. Pesticides and Environment: 39-85.12 Solang UK and Sribhuddachart J. 2002. Resistance management inPlutella xylostella on ccrucifers in southern Asia.http://www.msstate.edu/Entomology/v7n2/art14.html13 Tabashnik B.E., Cushing N.L. and Finson N. 1987. Leaf residue vstopical bioassay for assessing resistance in the diamondback moth(Lepidopetra: Plutellidae). FAO Pl. Prot. Bull. 35: 11-14.14 Talekar N.S. and Shelton A.M. 1993. Biology, ecology andmanagement of diamondback moth. Ann. Rev. Entomol. 38: 275-301.15 Umeda K., MacNeil D. and Roberts D. 2000. New insecticides fordiamondback moth control in cabbage. The University of ArizonaCollege of Agriculture 2000 vegetable report.http://ag.arizona.edu/pubs/crops/az1177/16 Zhao JZ., Zhu GR and Ju Z. 1995. Efficacy of fipronil anddiafenthiuron on the diamondback moth. Chinese vegetables. No. 2:25-27.http://www.nysaes.cornell.edu/ent/faculty/shelton/Zhao/publication.html (2002)BS Joia, KS Suri, & AS UdeaanDepartment of EntomologyPunjab Agricultural UniversityLudhiana, 141004IndiaArthropod ResistanceResurgence of Spider Mite Tetranychus ludeni Zacher (Acarina: Tetranychidae) Against Acaricides andBotanical Pesticides on CowpeaABSTRACT During the summer months, spider mite(Tetranychus ludeni Zacher) is a detrimental pest ofvegetable crops, especially on cowpea in the Varanasiregion of India. Field experiments were conducted tofind out the resurgence of this mite pest against someacaricides (viz., dicofol (18.5% EC), dicofol (5%WP),abamectin (1.9%EC), phosalone (35%EC), ethion(50%EC), and sulphur (80%WP)), and botanicalpesticides (viz., pongamia oil (2%), N.S.K.E. (5%),neem oil (2%), azadirachtin (0.03%), mahua oil (2%),and PSKE (5%)) at their recommended doses oncowpea crops. The chemical solutions were preparedjust before each spray, and were sprayed every twoweeks. The mortality of spider mite was observed atdifferent intervals including pre-spray and 1, 3, 7, and14 days after spray. The last observation of theprevious spray was counted as the pre-sprayobservation of the following spray, with the rest of theobservations taken similarly. The results indicated thatno resurgence was observed with dicofol (18.5%EC),dicofol (5%WP), abamectin (1.9%EC), and phosalone(35%EC), whereas some resurgence was observed inethion (50%EC) and sulphur (35%EC) despiteencouraging performances. Resurgence was shown in32