Effect of Some Insecticides on Pollen Germination of Grape Varieties Bolgar and Cabernet Sauvignon

A. NIKOLOV, P. BOTIYANSKI, D. KEHAYOV and V. ROICHEV

Agricultural University, BG-4000 Plovdiv, Bulgaria

Abstract

NIKOLOV, A., P. BOTIYANSKI, D. KEHAYOV and V. ROICHEV, 2000. Effect of some insecticides on pollen germination of grape varieties Bolgar and Cabernet Sauvignon. Bulg. J. Agric. Sci., 6: 29-31

In the period 1996 - 1998, the effect of insecticides and acaricides on pollen germination of grape varieties Bolgar and Cabernet Sauvignon was tested at the laboratory of the Department of Agrarian Ecology of the Agricultural University of Plovdiv. It was established that pyrethroids Decis 2.5 EC and Karate 5 EC do not inhibit pollen germination of both varieties and can be applied during flowering. Phosphoroorganic chemicals Reldan 50 EC and Zolon 35 EC, the insecto-acaricide Mitak 20 EC, the pyrethroid Vastac 10 EC and juvenoid Insegar 50 WP do not affect negatively pollen germination of Bolgar cultivar. Chemicals Zolon 35 EC and Insegar 50 WP inhibit pollen germination of Cabernet Sauvignon to a considerable degree. The combined chemical Nurele D inhibits pollen germination of Bolgar cultivar and slightly stimulates that of Cabernet Sauvignon. Acaricide Milbol 18.5 EC inhibits pollen germination of both varieties tested to almost the same degree.

Key words: insecticides, acaricides, pollen, insecto-acaricide, flowering, variety