According to the label From the product label
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EPA registration data for Reg. 62097-6-82917 →
Perlan is a plant growth regulator designed for use on apples, non-bearing pears, and non-bearing sweet cherries. It contains two active ingredients: Gibberellins A4 (1.8%) and Benzyladenine (1.8%). The product is used to improve fruit type and size by increasing the development of calyx lobes and elongating the fruit. It can also be used to increase lateral bud break on non-bearing trees and to mitigate fruit set reduction caused by frost in apples by stimulating parthenocarpic fruit development.
Application methods vary by crop and region. For most areas, a single application of 1-2 pints per acre is applied between early king bloom and early petal fall. In Washington, specific split application schedules are required. For orchard trees, rates typically range from 125 to 7500 ppm depending on the specific application (feathering, tree development, or latex application).
Handling precautions: Wear long-sleeved shirts, long pants, chemical-resistant gloves, protective eyewear, socks, and shoes. If using a sprayer, a chemical-resistant apron is recommended during mixing or loading. Avoid contact with eyes, skin, or clothing. If swallowed, call a poison control center or doctor immediately. If in eyes, rinse with water for 15-20 minutes. If on skin, wash with plenty of water for 15-20 minutes. This product must be used in accordance with the Worker Protection Standard (WPS).
Areas treatable (5)
apples, non-bearing pears, and non-bearing sweet cherriesorchard trees (feathering/development)orchard pears or nursery sweet cherriesorchard sweet cherries (latex application)apples (frost damage mitigation)
How to treat each type of area 5
apples, non-bearing pears, and non-bearing sweet cherries
| Location |
Rate |
Unit |
Label notes |
| Outdoor |
1-2 pints |
per acre |
Applied between early king bloom and early petal fall of side blossoms. |
orchard trees (feathering/development)
| Location |
Rate |
Unit |
Label notes |
| Outdoor |
125-500 |
ppm |
For orchard trees with 1-3 inches of new growth. |
orchard pears or nursery sweet cherries
| Location |
Rate |
Unit |
Label notes |
| Outdoor |
250-1000 |
ppm |
For orchard trees with 1-3 inches of new growth. |
orchard sweet cherries (latex application)
| Location |
Rate |
Unit |
Label notes |
| Outdoor |
5000-7500 |
ppm |
Apply to one-year-old wood when terminal buds begin to swell. |
apples (frost damage mitigation)
| Location |
Rate |
Unit |
Dilution |
Label notes |
| Outdoor |
1-2 pints |
per acre |
50-200 gallons water/acre |
Apply within 24 hours following a frost or freeze event. |
Mixing instructions 1
| Label notes |
| Use a non-ionic or buffered wetting adjuvant to improve coverage and efficacy. |
Worker safety
Re-entry interval (REI)
4
PPE required
Long-sleeved shirt and long pants, chemical-resistant gloves, protective eyewear, socks and shoes, chemical-resistant apron (during mixing/loading).
Timing & weather
- Apply between early king bloom and early petal fall.
- Do not apply if air temperature is <40°F or >90°F.
Use restrictions 4
- Do not apply if air temperature is less than 40°F or more than 90°F.
- Do not apply more than 2 pints/acre.
- Do not apply through any type of irrigation system.
- Do not apply directly to water or to intertidal areas below mean high water mark.