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boniferous to Permian suturing of Laurussia with Gondwana
welche Betriebsformen es gibt und wie sich die Struktur des deutschen Marktes darstellt
Als Beispiel können hier etwa die wachsenden Zahlen von
1837 -- Zur Warnung
Aphid Parasites (Hymenoptera, Aphidiidae) of the Mediterranean Area formatIsbn:Softcover - 9789061930297 und andereAn analysis of the particular topics in biological control programmes all over the world indicates an increased interest in the utilization of aphid parasites. Besides the so called traditional biological control of introduced aphids, there appears a situation which could perhaps be called a renaissance of biocontrol, i. e. the utilization of biotic agents against insecticide resistant populations of aphid pests. The rapid increase in the amount of