Control of Phytophthora palmivora on Orchids with Some New Systemic and Standard Fungicides
Three new systemic fungicides viz. Aliette (efosite-Al), Ridomil (metalaxyl) and Ridomil MZ (metalaxyl plus mancozeb) were screened against two standard fungicides viz. Terrazole (etridiazole) and Difolatan (captafol) for prophylactic and therapeutic efficacy against Phytophthora palmivora on orch...
| Main Authors: | , |
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| Format: | Article |
| Language: | English English |
| Published: |
1983
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| Online Access: | http://psasir.upm.edu.my/id/eprint/2169/ http://psasir.upm.edu.my/id/eprint/2169/1/Control_of_Phytophthora_palmivora_on_Orchids_with_Some_New_Systemic.pdf |
| _version_ | 1848839170958557184 |
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| author | Lim , Tong Kwee Lam, Nio Huat |
| author_facet | Lim , Tong Kwee Lam, Nio Huat |
| author_sort | Lim , Tong Kwee |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Three new systemic fungicides viz. Aliette (efosite-Al), Ridomil (metalaxyl) and Ridomil MZ
(metalaxyl plus mancozeb) were screened against two standard fungicides viz. Terrazole (etridiazole) and
Difolatan (captafol) for prophylactic and therapeutic efficacy against Phytophthora palmivora on orchids.
Terminal shoots of Aranda Christine hybrids were effectively protected from Phytophthora infection when
sprayed with metalaxyl at 0.05% a.i., metalaxyl-mancozeb mixture at 0.15% a.i. and captafol at 0.2% a.i.
three days before artificial inoculation. Etridiazole and efosite-Al, both at 0.1%a.i. did not give adequate
protection. Metalaxyl (0.05% a.i.) and its mixture with mancozeb (0.15% a.i.) retarded significantly disease
development by Phytophthora when used as a curative spray. Etridiazole (0.1% a.i.) and efosite-Al
(0.1% a.i.) gave moderate therapeutic control while captafol gave no therapeutic control. No phytoxicity
was observed with Ridomil MZ, Terrazole and Aliette up to concentrations of 0.5% a.i., 0.4% a.i. and
0.8% a.i. respectively. The Ridomil products, Aliette and Terrazole exhibited similar rates of inhibition
of linear extension of P. palmivora but differed in the degree of in vitro fungitoxicity. The Ridomil
products and Terrazole had EDso values of less than 1 Ilg/ml while Difolatan was relatively less toxic
(ED so 19.9 Ill/l). |
| first_indexed | 2025-11-15T07:07:12Z |
| format | Article |
| id | upm-2169 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T07:07:12Z |
| publishDate | 1983 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-21692013-05-27T06:59:17Z http://psasir.upm.edu.my/id/eprint/2169/ Control of Phytophthora palmivora on Orchids with Some New Systemic and Standard Fungicides Lim , Tong Kwee Lam, Nio Huat Three new systemic fungicides viz. Aliette (efosite-Al), Ridomil (metalaxyl) and Ridomil MZ (metalaxyl plus mancozeb) were screened against two standard fungicides viz. Terrazole (etridiazole) and Difolatan (captafol) for prophylactic and therapeutic efficacy against Phytophthora palmivora on orchids. Terminal shoots of Aranda Christine hybrids were effectively protected from Phytophthora infection when sprayed with metalaxyl at 0.05% a.i., metalaxyl-mancozeb mixture at 0.15% a.i. and captafol at 0.2% a.i. three days before artificial inoculation. Etridiazole and efosite-Al, both at 0.1%a.i. did not give adequate protection. Metalaxyl (0.05% a.i.) and its mixture with mancozeb (0.15% a.i.) retarded significantly disease development by Phytophthora when used as a curative spray. Etridiazole (0.1% a.i.) and efosite-Al (0.1% a.i.) gave moderate therapeutic control while captafol gave no therapeutic control. No phytoxicity was observed with Ridomil MZ, Terrazole and Aliette up to concentrations of 0.5% a.i., 0.4% a.i. and 0.8% a.i. respectively. The Ridomil products, Aliette and Terrazole exhibited similar rates of inhibition of linear extension of P. palmivora but differed in the degree of in vitro fungitoxicity. The Ridomil products and Terrazole had EDso values of less than 1 Ilg/ml while Difolatan was relatively less toxic (ED so 19.9 Ill/l). 1983 Article NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/2169/1/Control_of_Phytophthora_palmivora_on_Orchids_with_Some_New_Systemic.pdf Lim , Tong Kwee and Lam, Nio Huat (1983) Control of Phytophthora palmivora on Orchids with Some New Systemic and Standard Fungicides. Pertanika, 6 (1). pp. 34-39. English |
| spellingShingle | Lim , Tong Kwee Lam, Nio Huat Control of Phytophthora palmivora on Orchids with Some New Systemic and Standard Fungicides |
| title | Control of Phytophthora palmivora on Orchids with Some New Systemic and Standard Fungicides |
| title_full | Control of Phytophthora palmivora on Orchids with Some New Systemic and Standard Fungicides |
| title_fullStr | Control of Phytophthora palmivora on Orchids with Some New Systemic and Standard Fungicides |
| title_full_unstemmed | Control of Phytophthora palmivora on Orchids with Some New Systemic and Standard Fungicides |
| title_short | Control of Phytophthora palmivora on Orchids with Some New Systemic and Standard Fungicides |
| title_sort | control of phytophthora palmivora on orchids with some new systemic and standard fungicides |
| url | http://psasir.upm.edu.my/id/eprint/2169/ http://psasir.upm.edu.my/id/eprint/2169/1/Control_of_Phytophthora_palmivora_on_Orchids_with_Some_New_Systemic.pdf |