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Nematology 100

Nematology 100. Lecture 13 Slides. Nacobbus aberrans. Tylenchulus semipenetrans citrus. citrus replants - control vs. preplant fumigation. 1,3 dichloropropene-1,2 dichloropropane, preplant. DBCP application, Coachella. Tylenchulus semipenetrans citrus

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Nematology 100

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  1. Nematology 100 Lecture 13 Slides

  2. Nacobbus aberrans

  3. Tylenchulus semipenetrans • citrus citrus replants - control vs. preplant fumigation

  4. 1,3 dichloropropene-1,2 dichloropropane, preplant DBCP application, Coachella • Tylenchulus semipenetrans • citrus • chemical control trials, California untreated control

  5. Tylenchulus semipenetrans • fruit size, grapefruit • chemical control trial, Arizona

  6. Rotylenchulus reniformis

  7. Rotylenchulus reniformis - cotton R. reniformis - cowpea R. reniformis - soybean

  8. Rotylenchulus reniformis - nematicide trial, pineapple, Hawaii

  9. Nacobbus aberrans, Mexico

  10. Nacobbusaberrans -Wide host range. - High populationdensity in thefield. - Resistantto adverse condition. - Host rootsseverelygalled. IN MÉXICO: - First report by Bruner in pepper crops (1967). - Impact: + Hidalgo State.- Abandon production. + Tecamachalco, Puebla.- Losses of 83%. (Cid del Prado et al., 1997, Cristóbal, 2001).

  11. N. aberrans distribution in Mexico Cid del Prado et al. (1991).

  12. iMPORTANT ECONOMIC CROPS IN MEXICO TOMATO (Lycopersicon esculentum Mill.)

  13. CHILI PEPPER (Capsicum annuum L.)

  14. BEANS (Phaseolus vulgaris L.)

  15. POPULATION DYNAMICS - Complete life cycle (40-45 days) and maximum abundances of each stage in the roots. (Cid del Prado et al., 1995b; Cid del Prado et al., 1997a). - Maximum abundances in tomato crops: 1) J2 at 6, 11, 15 and 22 weeks after transplanting. 2) J3 at 4, 8 and 16 weeks after transplanting. - Adult females are evident in the second and third week after transplanting. Abundances may reach 20 females/g root (16th week). (Cid del Prado et al., 1997).

  16. - N. aberransJ3 and J4survive under field conditions without a host for one year. - J3 and J4, possibly in anhydrobiotic state, are the primary inoculum infecting susceptible hosts the next year. - Survival of J3 and J4 increases if they are in root fragments. - Eggs and J2 do not survive without a host or under adverse conditions. (Cristóbal, 2001). SURVIVAL

  17. EFFECTS ON PLANT NUTRITION (Nitrogen) Without nematodes With nematodes Roots Foliage

  18. EFFECTS ON PLANT NUTRITION (Phosphorus) Without nematodes With nematodes Roots Foliage

  19. BIOLOGICAL CONTROL *Organic amenments *Animal Manures *Nematophagous fungi Ignacio Cid del Prado and colleagues - Mexico

  20. Organic Material + Pochonia chlamydosporia Control

  21. GENETIC RESISTANCE IN BEANS Improvedvarieties: Bayo Mecentral, Flor de Mayo M-38, Bayo INIFAP, Negro Puebla and Río Grande. Criollas varieties: Amarillo Calpan, Black Querétaro, Negro San Luís, Flor de Junio Criollo and Flor de Mayo Criollo.

  22. INTEGRATED PEST MANAGEMENT FOR N. aberrans Total tomato production under different N. aberranscontrol strategies

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