Paul S. Lehman, December 2002 Nematology Section, Bureau ...
Nematology 100 Lecture 13 Slides. Nacobbus aberrans.
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Transcript of Nematology 100 Lecture 13 Slides. Nacobbus aberrans.
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Nematology 100
Lecture 13 Slides
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Nacobbus aberrans
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Tylenchulus semipenetrans- citrus
citrus replants- control vs. preplant fumigation
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Tylenchulus semipenetrans- citrus- chemical control trials, California
untreated control
1,3 dichloropropene-1,2 dichloropropane, preplant DBCP application, Coachella
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Tylenchulus semipenetrans- fruit size, grapefruit- chemical control trial, Arizona
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Rotylenchulus reniformis
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Rotylenchulus reniformis- cotton
R. reniformis- cowpea
R. reniformis- soybean
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Rotylenchulus reniformis- nematicide trial, pineapple, Hawaii
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Nacobbus aberrans, Mexico
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IN MÉXICO: IN MÉXICO:
- First report by - First report by Bruner in pepper crops (1967). Bruner in pepper crops (1967).
- Impact: - Impact:
+ + Hidalgo State.- Abandon production. Hidalgo State.- Abandon production. + Tecamachalco, Puebla.- Losses of 83%. + Tecamachalco, Puebla.- Losses of 83%. (Cid del Prado et al., 1997, Cristóbal, 2001).(Cid del Prado et al., 1997, Cristóbal, 2001).
-- Wide host range. Wide host range.
-- High population density in the field High population density in the field..
- Resistant to adverse condition.- Resistant to adverse condition.
-- Host roots severely galled. Host roots severely galled.
Nacobbus aberransNacobbus aberrans
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N. aberransN. aberrans distribution in Mexico distribution in Mexico
Cid del Prado Cid del Prado et alet al. (1991).. (1991).
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TOMATOTOMATO((Lycopersicon esculentum Lycopersicon esculentum Mill.Mill.))
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CHILI PEPPERCHILI PEPPER((Capsicum annuum Capsicum annuum L.L.))
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BEANSBEANS((Phaseolus vulgaris Phaseolus vulgaris L.L.))
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- Complete life cycle (40-45 days) and maximum abundances of - Complete life cycle (40-45 days) and maximum abundances of each stage in the roots.each stage in the roots.
((Cid del Prado Cid del Prado et al.et al., 1995b; Cid del Prado , 1995b; Cid del Prado et al.et al., 1997a, 1997a).).
- Maximum abundances in tomato crops: - Maximum abundances in tomato crops:
1) J2 at 6, 11, 15 and 22 weeks after transplanting.1) J2 at 6, 11, 15 and 22 weeks after transplanting.
2) J3 at 4, 8 and 16 2) J3 at 4, 8 and 16 weeks after transplantingweeks after transplanting. .
- Adult females are evident in the second and third week after - Adult females are evident in the second and third week after transplanting. Abundances may reach 20 females/g root (16transplanting. Abundances may reach 20 females/g root (16thth week).week).
((Cid del Prado Cid del Prado et al.et al., ,
19971997). ).
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- - N. aberransN. aberrans J3 J3 andand J4 J4 survive under field conditions without a survive under field conditions without a host for one year.host for one year.
- J3 and J4, possibly in anhydrobiotic state, are the primary - J3 and J4, possibly in anhydrobiotic state, are the primary inoculum infecting susceptible hosts the next year.inoculum infecting susceptible hosts the next year.
- Survival of J3 and J4 increases if they are in root fragments. - Survival of J3 and J4 increases if they are in root fragments.
- Eggs and J2 do not survive without a host or under adverse - Eggs and J2 do not survive without a host or under adverse conditions. conditions.
(Cristóbal, 2001). (Cristóbal, 2001).
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Without nematodes With nematodes
Roots Foliage
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Without nematodes With nematodes
Roots Foliage
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Ignacio Cid del Prado and colleagues - Mexico
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ControlOrganic Material
+Pochonia chlamydosporia
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Improved varieties:Improved varieties:
Bayo MecentralBayo Mecentral, , Flor de Mayo M-38Flor de Mayo M-38, , Bayo INIFAPBayo INIFAP, , Negro Puebla Negro Puebla and and Río Río
GrandeGrande..
Criollas varieties:Criollas varieties:
Amarillo CalpanAmarillo Calpan, , Black QuerétaroBlack Querétaro, , Negro San LuísNegro San Luís, , Flor de Junio Criollo Flor de Junio Criollo
and and Flor de Mayo CriolloFlor de Mayo Criollo..
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Management Chicken manure Control Oxamyl
To
n h
a-1
Total tomato production under different Total tomato production under different N. aberransN. aberrans control strategiescontrol strategies
INTEGRATED PEST MANAGEMENT FOR INTEGRATED PEST MANAGEMENT FOR N. aberransN. aberrans