On the occurrence of bruchids in imports and leguminous seeds in the interior.
In the German Democratic Republic, bruchids have been classified as of quarantine importance and imported leguminous seeds have to be inspected and if necessary disinfested. Infestation of imported seed material is rare and only one case has been reported in the last 5 years, but infestation of seeds for human or animal consumption has increased. In order to assess the effect of imports on the infestation of home-grown seed, a survey of the situation in 1968-75 was made, and the results are given and discussed. The principal species found in imports were Bruchus rufimanus Boh. in one lot of field beans [Vicia faba] from the German Federal Republic, B. pisorum (L.) in fodder peas from China (and in the earlier years from fumigated peas from Rumania), B. lentis Frol. in lentils from Tunisia and occasionally apricot seeds from the Lebanon, Acanthoscelides obtectus (Say) in beans from Ethiopia, Argentina and Turkey and coffee beans from Brazil, Callosobruchus chinensis (L.) in lentils from the Labanon, C. maculatus (F.) in soy beans from Nigeria, C. analis (F.) in Dolichos beans from India, Caryedon serratus (0l.) in groundnuts from India and cacao from Ghana, and Pachymerus cardo (Fhs.) on palm kernels from Zanzibar. Many of these interceptions were of individuals surviving in fumigated imports or of single beetles only in untreated products. The species of most importance in home-grown leguminous seeds were B. rufimanus on V. faba, B. atomarius (L.) also on V. faba, and some in stored beans. It is noted that B. pisorum has not occurred in the field for many years, that B. brachialis (Fhs.) has not been seen in the country except on introduced vetch [Vicia] and that V. sativa grown for seed appears not to be infested at present. Other occurrences and the situation as regards stored seeds, which is not serious, are reviewed. It is noted that introductions with imports have steadily fallen and that in 1975 no sendings were infested. The only species of significance in inland plantings is B. rufimanus.