Chemical thinning programs for 'Fuji Mishima' apple trees under black anti-hail net
Abstract The objective of this work was to evaluate chemical thinning programs containing mixtures of different plant growth regulators, at low concentrations, applied to 'Fuji Mishima' apple trees at post-blossom, as well as to identify the most effective in reducing fruit set, decreasing...
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| Format: | Article |
| Language: | English |
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Embrapa Informação Tecnológica
2023-10-01
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| Series: | Pesquisa Agropecuária Brasileira |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2023000102805&tlng=en |
| _version_ | 1797658832094101504 |
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| author | Lucas De Ross Marchioretto Andrea De Rossi Gilmar Arduino Bettio Marodin |
| author_facet | Lucas De Ross Marchioretto Andrea De Rossi Gilmar Arduino Bettio Marodin |
| author_sort | Lucas De Ross Marchioretto |
| collection | DOAJ |
| description | Abstract The objective of this work was to evaluate chemical thinning programs containing mixtures of different plant growth regulators, at low concentrations, applied to 'Fuji Mishima' apple trees at post-blossom, as well as to identify the most effective in reducing fruit set, decreasing the need of manual thinning, and improving fruit quality. Under a black anti-hail net, the apple trees were sprayed with the six following chemical thinning protocols (treatments): benzyladenine (BA) + gibberellin4+7 (GA) at full bloom (FB) and BA + carbaryl (CB) on fruitlets with a 15 mm diameter; BA + GA at FB and naphthaleneacetic acid (NAA) + CB on fruitlets with a 7 mm diameter; BA + GA at FB and BA + CB on fruitlets with a 15 mm diameter; ethephon (ETH) + CB on fruitlets with a 15 mm diameter and metamitron (MM) + ETH on fruitlets with a 20 mm diameter; and MM on fruitlets with a 7 mm diameter and MM on fruitlets with a 20 mm diameter. The treatments were compared with an untreated and a manual thinning control. The black net reduced photosynthetically active radiation in 22%. For 'Fuji Mishima' apples under a black anti-hail net, the chemical thinning program consisting of BA + GA (47 + 47 g a.i. ha-1) at FB, followed by BA + CB (80 + 288 g a.i. ha-1) on fruitlets with a 15 mm diameter, consistently reduces fruit set, requires less manual thinning, and improves fruit weight and size. |
| first_indexed | 2024-03-11T18:05:01Z |
| format | Article |
| id | doaj.art-49cd0350f54b4f9ba58a6e342d3ec60c |
| institution | Directory Open Access Journal |
| issn | 1678-3921 |
| language | English |
| last_indexed | 2024-03-11T18:05:01Z |
| publishDate | 2023-10-01 |
| publisher | Embrapa Informação Tecnológica |
| record_format | Article |
| series | Pesquisa Agropecuária Brasileira |
| spelling | doaj.art-49cd0350f54b4f9ba58a6e342d3ec60c2023-10-17T07:41:28ZengEmbrapa Informação TecnológicaPesquisa Agropecuária Brasileira1678-39212023-10-015810.1590/s1678-3921.pab2023.v58.03196Chemical thinning programs for 'Fuji Mishima' apple trees under black anti-hail netLucas De Ross Marchiorettohttps://orcid.org/0000-0002-6677-4696Andrea De Rossihttps://orcid.org/0000-0001-8038-622XGilmar Arduino Bettio Marodinhttps://orcid.org/0000-0002-7932-2074Abstract The objective of this work was to evaluate chemical thinning programs containing mixtures of different plant growth regulators, at low concentrations, applied to 'Fuji Mishima' apple trees at post-blossom, as well as to identify the most effective in reducing fruit set, decreasing the need of manual thinning, and improving fruit quality. Under a black anti-hail net, the apple trees were sprayed with the six following chemical thinning protocols (treatments): benzyladenine (BA) + gibberellin4+7 (GA) at full bloom (FB) and BA + carbaryl (CB) on fruitlets with a 15 mm diameter; BA + GA at FB and naphthaleneacetic acid (NAA) + CB on fruitlets with a 7 mm diameter; BA + GA at FB and BA + CB on fruitlets with a 15 mm diameter; ethephon (ETH) + CB on fruitlets with a 15 mm diameter and metamitron (MM) + ETH on fruitlets with a 20 mm diameter; and MM on fruitlets with a 7 mm diameter and MM on fruitlets with a 20 mm diameter. The treatments were compared with an untreated and a manual thinning control. The black net reduced photosynthetically active radiation in 22%. For 'Fuji Mishima' apples under a black anti-hail net, the chemical thinning program consisting of BA + GA (47 + 47 g a.i. ha-1) at FB, followed by BA + CB (80 + 288 g a.i. ha-1) on fruitlets with a 15 mm diameter, consistently reduces fruit set, requires less manual thinning, and improves fruit weight and size.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2023000102805&tlng=enMalus domesticaphotosynthetically active radiationplant growth regulatorssemi-vigorous rootstock |
| spellingShingle | Lucas De Ross Marchioretto Andrea De Rossi Gilmar Arduino Bettio Marodin Chemical thinning programs for 'Fuji Mishima' apple trees under black anti-hail net Pesquisa Agropecuária Brasileira Malus domestica photosynthetically active radiation plant growth regulators semi-vigorous rootstock |
| title | Chemical thinning programs for 'Fuji Mishima' apple trees under black anti-hail net |
| title_full | Chemical thinning programs for 'Fuji Mishima' apple trees under black anti-hail net |
| title_fullStr | Chemical thinning programs for 'Fuji Mishima' apple trees under black anti-hail net |
| title_full_unstemmed | Chemical thinning programs for 'Fuji Mishima' apple trees under black anti-hail net |
| title_short | Chemical thinning programs for 'Fuji Mishima' apple trees under black anti-hail net |
| title_sort | chemical thinning programs for fuji mishima apple trees under black anti hail net |
| topic | Malus domestica photosynthetically active radiation plant growth regulators semi-vigorous rootstock |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2023000102805&tlng=en |
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