ISHS Acta Horticulturae 297: II International Symposium on Kiwifruit
RESPONSE AND TOLERANCE OF KIWIFRUIT PLANTS TO SOIL-ACTIVE HERBICIDES |
| Authors: | M. Kogan, P. Peñaloza, J.P. Bouchet |
| Keywords: | terbuthylazine, napropamide, oxyfluorfen, metolachlor, simazine, norfluorazon, diuron |
| Abstract:
The tolerance of kiwifruit seedlings (Actinidia chinensis) to soil active herbicides was studied. Kiwifruit rootstock and newly grafted plants were transplanted into black plastic bags with two media: a sandy loam and a clay loam soil with 2.0 and 3.1% of organic matter, respectively. Seven residual herbicides were applied to the soils. Three rates were tested for each product: lowest rate recommended for annual weed control in orchards, highest rate recommended, and double the highest rate recommended. All herbicides produced some detrimental effect on plants, independent of the soil type. Root growth was more seriously affected than shoot growth. Best crop tolerance was achieved with terbuthylazine, napropamide, oxyfluorfen and metolachlor. Simazine, norfluorazon and diuron were the most phytotoxic. However, only the highest rate of norfluorazon (8.0 kg/ha) and diuron (4.0 kg/ha) produced typical foliar visual symptoms. No clear difference in response between the rootstock and newly grafted plants was seen. | |
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