Folia Horticulturae

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Effect of the insecticide Karate 2.5 EC (lambda-cyhalothrin) on the mitotic process in root meristems of the pea (Pisum sativum L.)

Lucyna Samek

Department of Genetics, Plant Breeding and Seed Science
Faculty of Horticulture, Agricultural University
29 Listopada 54, 31-425 Kraków, Poland

The effect of the insecticide Karate 2.5 EC (lambda-cyhalothrin) of the synthetic pyrethroid group on the mitotic process in root meristems of pea seedlings was investigated. Two concentrations of the preparation were used: 0.04% (recommended for agricultural practice) and 0.08%. The experiment was conducted in laboratory conditions at 10°C and 20°C. The evaluation was made directly after 4-h action of the insecticide and after the successive two days of the post-incubation period. It included analysis of the mitotic and phase index and aberrations in metaphase, anaphase, early telophase, and interphase.

The effect of the investigated insecticide was manifested by a decrease in the mitotic activity and changes chiefly of the c-mitotic type. The action of Karate 2.5 EC depended on temperature, length of the post-incubation period and, to a smaller degree, on the concentration of the insecticide.

Samek L., 1998. Effect of the insecticide Karate 2.5EC (lambda-cyhalothrin) on the mitotic process in oot meristems of the pea (Pisum sativum L.). Folia Horticulturae 10/2: 53-61.