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Chemical Control of Heterodera rostochiensis Woll. 1)
Author(s) -
Ouden H. den
Publication year - 1974
Publication title -
eppo bulletin
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.327
H-Index - 36
eISSN - 1365-2338
pISSN - 0250-8052
DOI - 10.1111/j.1365-2338.1974.tb02400.x
Subject(s) - heterodera , fumigation , nematode , heterodera avenae , aldicarb , biology , dose , horticulture , agronomy , toxicology , ecology , pesticide , pharmacology
In Dutch field experiments with Heterodera rostochiensis Woll. systemic nematicides at low and high nematode densities resulted in unfavourable cost/ benefit relations, as compared to other control procedures; on average, a 50 % reduction of the maximum multiplication of the nematode was observed. In England, better results were obtained at high nematode densities when higher dosages of nematicides were worked into the soil at a depth of 15 cm. In order to obtain a better effect of the mostly used contact nematicide DD‐mixture at a moderate dosage, a special treatment of the soil surface with the non‐fumigant dazomet was combined with the fumigation. On clay soil more than 99 % kill of stem nematodes was obtained with 30 g dazomet + 50 ml DD‐mixture per m When 10 g dazomet was added a 80% kill of Rolylenchus uniformis (Thorne) could be obtained on sandy soil; this was equivalent to 2 applications of the DD‐mixture alone. The combined treatment offers the great advantage of increasing the chances by 3 times to make the appropriate choice of the year for the treatment. Eggs of R. uniformis and H. rostochiensis are less susceptible to DD‐mixture than free living larvae and adults.