Rubber seed oil for partial substitution of mineral oil used as carrier for copper fungicide in the management of abnormal leaf fall disease of rubber

Manju M.J., . and Srinivas P., . and Mushrif S.K., . and Jacob C.K., . and Prem E.E., . and Idicula S.P., . Rubber seed oil for partial substitution of mineral oil used as carrier for copper fungicide in the management of abnormal leaf fall disease of rubber. pp. 54-61. ISSN 1511-1768

Rubber seed oil (RSO) was evaluated for its potential use in oil-based spray formulations against abnormal leaf fall disease of rubber (Hevea brasiliensis) which could influence the economics of disease management. A mixture of RSO and mineral spray oil (SO) in a proportion of 1:2 was assessed as a carrier for the fungicide copper oxychloride (COC) in comparison with SO alone. The scope for reducing the dosage of COC when RSO and SO were mixed (1:2 proportion) for spraying against abnormal leaf fall disease was investigated in field trials in two endemic locations over six years. Results indicated that the use of RSO for partial substitution of SO was promising and resulted in similar disease control as provided by the use of SO. Lower dosage(6 kg/ha) of COC was found to be comparable to the recommended dosage of COC (8 kg/ha) when RSO SO was used as carrier. RSO had no phytotoxic effect on the rubber leaves either alone or in combination with spray oil. Reduction in cost was evident when a combination of partial complementation with RSO and a reduced dosage of COC was applied.

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Abstract

Rubber seed oil (RSO) was evaluated for its potential use in oil-based spray formulations against abnormal leaf fall disease of rubber (Hevea brasiliensis) which could influence the economics of disease management. A mixture of RSO and mineral spray oil (SO) in a proportion of 1:2 was assessed as a carrier for the fungicide copper oxychloride (COC) in comparison with SO alone. The scope for reducing the dosage of COC when RSO and SO were mixed (1:2 proportion) for spraying against abnormal leaf fall disease was investigated in field trials in two endemic locations over six years. Results indicated that the use of RSO for partial substitution of SO was promising and resulted in similar disease control as provided by the use of SO. Lower dosage(6 kg/ha) of COC was found to be comparable to the recommended dosage of COC (8 kg/ha) when RSO SO was used as carrier. RSO had no phytotoxic effect on the rubber leaves either alone or in combination with spray oil. Reduction in cost was evident when a combination of partial complementation with RSO and a reduced dosage of COC was applied.

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Item Type:	Article
AGROVOC Term:	Hevea brasiliensis
AGROVOC Term:	Copper oxychloride
AGROVOC Term:	Spraying
AGROVOC Term:	Properties
AGROVOC Term:	Phytophthora
AGROVOC Term:	Fungicides
AGROVOC Term:	Rubber
AGROVOC Term:	Disease control
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23073

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