Effect of Planting Date on Population Densities of Hoplolaimus columbus and Yield of Soybean.

During the 1991 and 1992 soybean growing seasons, field plots were established in South Carolina to study the effect of planting date on at-planting nematode densities and subsequent yield losses caused by Hoplolaimus columbus. The susceptible and intolerant soybean cv. Braxton was planted on five dates from to May to 28 June in 1991 and from 12 May to 28 June in 1992. Nematodes were recovered from soil samples collected before nematicide treatment with 1,3-D (Pi), at 6 weeks after planting (Pm), and at harvest (Pf). Initial nematode population densities did not differ among the five dates of planting in either year. The increase in numbers of nematodes from planting to 6 weeks after planting (Pm/Pi) and from planting to harvest (Pf/Pi) were not different among the five planting dates in either year. Root samples also were collected at 6 weeks after planting and at harvest, but planting date did not affect the number of nematodes extracted from roots on any sample date in either year. Altering planting dates between early May and late June was not effective in preventing yield suppression due to H. columbus.

[1]  J. Saunders,et al.  Plant-parasitic Nematodes on Soybean in South Carolina. , 1993, Journal of nematology.

[2]  D. Schmitt.  Management of Heterodera glycines by Cropping and Cultural Practices. , 1991, Journal of nematology.

[3]  W. Tadesse,et al.  The Effect of Different Planting Dates on the Infestation of Soybean by Heterodera glycines Race 5 , 1991 .

[4]  L. Heatherly.  Planting Date, Row Spacing, and Irrigation Effects on Soybean Grown on Clay Soil , 1988 .

[5]  D. Schmitt,et al.  Management of Hoplolaimus columbus with Tolerant Soybean and Nematicides. , 1987, Journal of nematology.

[6]  J. Mueller,et al.  Control of Hoplolaimus columbus on Late-planted Soybean with Aldicarb. , 1987, Journal of nematology.

[7]  S. Koenning,et al.  Influence of Planting Date on Population Dynamics and Damage Potential of Pratylenchus brachyurus on Soybean. , 1985, Journal of nematology.

[8]  P. Roberts,et al.  Effects of Soil Temperature and Planting Date of Wheat on Meloidogyne incognita Reproduction, Soil Populations, and Grain Yield. , 1981, Journal of nematology.

[9]  O. J. Dickerson.  The Effects of Temperature on Pratylenchus scribneri and P. alleni Populations on Soybeans and Tomatoes. , 1979, Journal of nematology.

[10]  S. Lewis,et al.  Host plants, distribution, and ecological association of Hoplolaimus columbus. , 1976, Journal of nematology.

[11]  N. A. Minton,et al.  Soybean Yields and Lance Nematode Populations as Affected by Subsoiling, Fertility, and Nematicide Treatments1 , 1975 .

[12]  J. Saunders,et al.  A survey of South Carolina cotton fields for plant-parasitic nematodes , 1994 .

[13]  B. Sipes,et al.  Effect of Planting Date, Alachlor, and Fenamiphos on Heterodera glycines Development. , 1989, Journal of nematology.

[14]  K. Barker,et al.  Determining nematode population responses to control agents , 1986 .

[15]  S. Lewis,et al.  Relative Tolerance of Selected Soybean Cultivars to Hoplolaimus columbus and Possible Effects of Soil Temperature. , 1979, Journal of nematology.

[16]  W. R. Jenkins,et al.  A rapid centrifugal-flotation technique for separating nematodes from soil. , 1964 .

[17]  S. Sher.  Revision of the Hoplolaiminae (Nematoda) Iii. Scutellonema Andrassy, 1958 1) , 1963 .

[18]  S. Sher.  Revision of the Hoplolaiminae (Nematoda) Ii. Hoplolaimus Daday, 1905 and Aorolaimus N. Gen , 1963 .