Applin

"Applin PGR" likely refers to a plant growth regulator (PGR) designed specifically for use in apple orchards. PGRs are substances that, when applied to plants, regulate their growth and development. In the context of apple orchards, PGRs can be used to manage various aspects of apple tree growth, such as controlling vegetative growth, promoting fruit set, and improving fruit quality.

Here are some common ways PGRs might be used in apple orchards:

1. Vegetative Growth Control: PGRs can be applied to regulate the growth of apple trees, helping to maintain their size and shape. This can be particularly useful in high-density orchards or where space is limited.
2. Fruit Thinners: Some PGRs are used to thin the fruit crop on apple trees, ensuring that the remaining fruits have enough space to grow to optimal size and reducing the risk of biennial bearing (where trees produce a large crop one year and a small crop the next).
3. Fruit Size and Quality: PGRs can also be used to improve the size, color, and quality of apples. They may help enhance fruit coloration, increase sugar content, and improve storage characteristics.
4. Blossom and Fruit Set: Certain PGR formulations can aid in increasing blossom and fruit set, ensuring a more abundant crop.

It's essential to use PGRs according to manufacturer instructions and recommended application rates, as improper use can lead to undesirable effects such as over-thinning, reduced fruit quality, or phytotoxicity.