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Chemical control of Phytophthora root rot on young replanted avocado trees


, : Chemical control of Phytophthora root rot on young replanted avocado trees. Yearbook, South African Avocado Growers' Association 5: 94-95

Several fungicides were compared in a trial with Edranol avocado seedlings replanted in soil infested with Phytophthora cinnamomi.

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Related references

Darvas, J.M.; Toerien, J.C.; Kotze, J.M., 1979: Control of Phytophthora root rot on young replanted avocado trees. In a 2-year trial Guatemalan avocado seedlings were planted in soil infested with Phytophthora cinnamomi and several chemicals, either alone or together, were applied to the foliage or the soil during the rainy months (October to March). Soil appl...

Darvas, J.M.; Kotze, J.M.; Toerien, J.C., 1979: Chemical control of Phytophthora root rot on replanted avocado trees. Avocado trees severely infected with Phytophthora cinnamomi were cut back to the trunk and after the surrounding soil had been thoroughly stirred 8 beds, each 1.5 m in extent, were prepared in the dripline around each tree. Three Guatemalan avocad...

Darvas, J.M., 1978: Chemical control of Phytophthora root rot on fully grown avocado trees. In a trial with Fuerte avocado trees severely infected with Phytophthora cinnamomi, CGA 48988 [metalaxyl] granules at 50 g a.i./tree, applied 4 times at 10-week intervals between March and September resulted in a marked improvement in the conditio...

Darvas, J.M., 1982: Chemical control of Phytophthora root rot on fully grown avocado trees. In a 4-year trial with Fuerte avocado trees on Guatemalan rootstocks, the effects were compared of metalaxyl at 0.5 or 2.5 g/m2 applied round the trees 4 times in the first year at 10-week intervals and twice a year in the following 3 years at 12-...

Milne, D.L.; Hughes, J.P.; Brodrick, H.T.; Villiers, E.A. de; Frean, R.T., 1973: Attempts to control Phytophthora root rot on established avocado trees. In trials with mature avocado trees severely affected by P. cinnamomi 5% granular Dexon (p-dimethyl-aminobenzenediazo sodium sulphate), applied alone at economic rates, did not control the disease. However, broadcast applications at 3-monthly inte...

Darvas, J.M.; Toerien, J.C.; Milne, D.L., 1983: Injection of established avocado trees for the effective control of Phytophthora root rot. In a trial with 10-year-old Fuerte avocado trees on Guatemalan rootstocks comparing several fungicides for the control of root rot (Phytophthora cinnamomi), the best results were obtained with fosetyl-Al injected into the trunk at 0.4 g/m2 canopy...

Zentmyer, G.A.; Mircetich, S.M.; Johnson, E., 1967: Phytophthora root rot of Avocado-Chemical control. Application of dexon to the soil has given good control of P. in several experimental plots. For a 6-8-yr.

Erspamer, J.L.; Zentmyer, G.A., 1956: Effect of Vapam as a soil fungicide in control of Phytophthora root rot of avocado trees. Several concentrations and methods of application of Vapam were used on avocado trees infected with Phytophthora cinnamomi. Infection was reduced by 50 to 100 p.p.m. and eliminated in some plots by 150 p.p.m. to 200 p.p.m. Damage to living roots w...

Pinkas Y.; Baum D., 1988: Control of phytophthora root rot of avocado by injection of fosetyl al or phosphorous acid into infected trees. Phytoparasitica 16(1): 91

Gilpatrick, J.D., 1969: Role of ammonia in the control of Avocado root rot with Alfalfa meal soil amendment. Effect of soil amendments upon inoculum survival and function in Phytophthora root rot of Avocado. At Univ. Calif., Riverside and Berkeley, soil contained 60-197 ppm ammonia 1 week after amendment with lucerne meal (5% w/w), compared with 2-8 ppm in nonamended soil and treated soil 4-8 weeks later. Phytophthora cinnamomi was killed in infected...