Chemical weeding of Scots pine plantations on drained peaty soils

Chizhov, B.E.; Petrov, A.A.

Sbornik Nauchnykh Trudov, Leningradskii Nauchno issledovatel' skii Institut Lesnogo Khozyaistva 27: 53-57


Accession: 000614112

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An account of weed control trials in young Scots pine plantations on drained peat bogs in the south of the Tyumen region (W. Siberia). The herbicides used were propazine, zeazine, Gardoprim, atrazine granulate, and Prefix, applied at various times in 1974. The main weeds present were Epilobium palustre, Calamagrostis sp. and Cirsium palustre. Details are tabulated on the % weed cover and wt. of weeds per unit area in 1974 and 1975, and the susceptibility of the various weeds is discussed. Prefix at 10-15 kg/ha caused damage to over 10% of the pine. The triazine herbicides gave good weed control; mortality of the pine on areas treated with Gardoprim and zeazine at 15 kg/ha, or with propazine at all doses, did not exceed 5% whereas on the untreated control area it was 15-30%. In the second year after treatment, the ht. increment of the pine was 15-30% greater than on the untreated areas; diam. increment was 30-90% greater.