In vitro toxicity of 1 2 di bromo 3 chloro propane to some phytophagous nematodes and hatchability of heterodera cajani

Sethi, C.L.; Pradad, D.

Indian Journal of Nematology 12(1): 65-72

1982


ISSN/ISBN: 0303-6960
Accession: 005652715

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Abstract
Toxicological tests with different concentrations of DBCP [1,2-dibromo-3-chloropropane] and exposure of Pratylenchus zeae, Tylenchorhynchus vulgaris and Hemicriconemoides cocophillus revealed that the percentage mortality was directly proportional to both the increased concentration and exposure period. There was almost complete kill of all 3 nematode species when exposed to 160 ppm or more for 24 h. With CTP [concentration-time-product] value as parameter, T. vulgaris was more susceptible to DBCP as compared to P. zeae and H. cocophillus. P. zeae was more susceptible at 20.degree. than at 10.degree. or 30.degree. C. Similarly, larval emergence from cysts of Heterodera cajani was proportionately affected with an increase of DBCP concentration and exposure period. Larval emergence was reduced to 9.5, 4.8 and 0.8% in 640 ppm for 2, 4 and 8 days, respectively, as against 41.0% emergence in check treatment.