אסיף מאגר המחקר החקלאי

Internal therapy of mal secco of lemon by pressure injection of fungicides

Year:

1977

Source of publication :

Authors :

Volume :

83

Co-Authors:

Solel, Z., Division of Plant Pathology, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Pinkas, Y., Division of Plant Pathology, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Shabi, E., Division of Plant Pathology, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel

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Abstract:

Injection of thiabendazole through topped stems of lemon seedlings resulted in primary distribution along the stem and leaves. The distribution was enhanced by the addition of citrate buffer. When injected into limbs of mature lemon trees, thiabendazole spread 175 cm from the injection point without being affected by buffer supplement. The primary distribution of carbendazim injected into the limbs of lemon trees was proportional to the dose and volume of solution. In winter the toxicant moved up to 300 cm above the injection point and in summer only to 150 cm. Accumulation of carbendazim in leaves as a result of secondary distribution was highest following summer injection. The therapeutic effect on mal secco disease (Phoma tracheiphila) of lemon was studied. When seedlings were injected with buffered thiabendazole at the end of the incubation period, no viable mycelium was detected in the stem. When infected trees were injected with thiabendazole and carbendazim salts, partial therapy was obtained; the pathogen was not isolated from some twigs but was viable in others. In vitro screening of fungicides at 0.1 mM revealed eradicative action on P. tracheiphila by several toxicants. © 1977 Koninklijke Nederlandse Planteziektenkundige Vereniging.

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