Why Is Forchlorfenuron the Preferred Choice for Increasing Fruit Size and Yield?

Technical Introduction

Forchlorfenuron (C₁₂H₁₀ClN₃O, CAS No. 68157-60-8), commonly abbreviated as CPPU, is a synthetic cytokinin-type plant growth regulator.
It is highly effective in stimulating cell division and cell expansion, leading to larger fruit size, improved fruit set, and delayed senescence.
First developed in Japan, CPPU is now used globally in horticulture for crops like kiwifruit, grapes, and melons.

Unlike some PGRs, CPPU exhibits strong stability, low photodegradation, and prolonged biological activity in plants.

Applications

1. Fruit Production

• Fruit Enlargement: Significantly increases size in grapes, kiwifruit, and melons.

• Improved Fruit Set: Enhances pollination success and fruit retention.

• Delayed Ripening: Extends harvesting window for better market timing.

2. Vegetable Production

• Improves uniformity and weight in cucumbers, pumpkins, and gourds.

3. Ornamental Horticulture

• Promotes longer-lasting flowers by delaying petal senescence.

Advantages

• High Efficiency at Low Doses: Works effectively in ppm-level concentrations.

• Yield Boost: Enhances both size and number of marketable fruits.

• Versatility: Applicable via foliar spray, dipping, or injection.

• Market Flexibility: Delayed harvest improves logistics and pricing strategies.

Typical Parameters

FAQs

Q1: Does CPPU replace pollination?
A1: No—it supports fruit development after pollination but cannot replace it in crops that require fertilization.

Q2: How long before harvest can it be applied?
A2: Typically several weeks before harvest; specific intervals depend on the crop and local regulations.

Q3: Can CPPU be mixed with other agrochemicals?
A3: Often yes, but jar tests are recommended to check compatibility.

Q4: Is CPPU safe for all fruits?
A4: Some varieties may be sensitive, requiring careful dose adjustment.

Q5: Does CPPU improve flavor?
A5: Its main effect is size and firmness; flavor changes depend on crop variety and maturity at harvest.