Bayer Aktiengesellschaft

Ciba-geigy Ag

Hartwig Holst

Gerhard Zoebelein

Hans Zahner

Adelinde Keckeisen

Hans-Paul Hagenmaier

Wilhelm Brandes

Wilhelm Stendel

Paul Reinecke

Klaus Schaller

Peter Andrews

Wilfried Konig

Wolfgang Dehler

Hans-Peter Fiedler

Hannelore Drautz

Gerhard Werner

A method of combating arthropods, comprising applying to the arthropods, or to a habitat infested therewith an arthropodicidally effective amount of an antibiotic which (a) is colorless, very readily soluble in water and in pyridine but insoluble in other customary organic solvents, gives a positive reaction with ninhydrin, sodium metaperiodate/benzidine and potassium permanganate and gives a yellow coloration with iron (III) chloride, (b) has the UV and IR spectra substantially as shown in FIGS. 1 and 2, (c) on chemical degradation yields uracil, an amino-hexuronic acid and an amino-acid containing a pyridine ring, (d) on paper electrophoresis proves to be an amphoteric substance and has an isoelectric point at about pH 6 and (e) consists of the elements carbon, hydrogen, oxygen and nitrogen, or one or more active components of the antibiotic mixture, the active agent being applied alone or in admixture with a diluent or carrier. The antibiotic is known as Nikkomycin which is apparently a mixture of components of the formula ##STR1## in which R.sub.1 is ##STR2## and R.sub.2 is hydrogen, ##STR3##

Antibiotics, a process for their preparation and their use as plant

Bafilomycins of the formula ##STR1## in which R.sup.1 is hydrogen or CH.sub.3, and

Bafilomycin pesticides

Pesticidally active substantially pure nikkomicin fractions obtained from Streptomyces tendae Ettlinger et al Tu 901, the fractions being selected from the group consisting of ##STR1## a mixture of nikkomicin I and J, and a mixture of nikkomicin M and N.

Nikkomicins, a process for their preparation and their use as agents for

A method of combating arthropods, comprising applying to the arthropods, or to a habitat infested therewith an arthropodicidally effective amount of an antibiotic which (a) is colorless, very readily soluble in water and in pyridine but insoluble in other customary organic solvents, gives a positive reaction with ninhydrin, sodium metaperiodate/benzidine and potassium permanganate and gives a yellow coloration with iron (III) chloride, (b) has the UV and IR spectra substantially as shown in FIGS. 1 and 2, (c) on chemical degradation yields uracil, an amino-hexuronic acid and an amino-acid containing a pyridine ring, (d) on paper electrophoresis proves to be an amphoteric substance and has an isolectric point at about pH 6 and (e) consists of the elements carbon, hydrogen, oxygen and nitrogen, or one or more active components of the antibiotic mixture, the active agent being applied alone or in admixture with a diluent or carrier. The antibiotic is known as Nikkomycin which is apparently a mixture of components of the formula ##STR1## in which R.sub.1 is ##STR2## and R.sub.2 is hydrogen, ##STR3##

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Pohlheim, Germany

Hartwig Holst