The fungi colonize on the roots of the plant, which connects the soil and the roots of the plants directly. Water and nutrients are then absorbed through the fungi into the roots. Microorganisms also form around the roots of the plant and directly benefit health and growth of the plant itself.
No. The more fungi that come into contact with the roots of the plant, the better results you will see. The more you add, the better chances you will have of full colonization and optimal benefits to the plant.
Yes. Mycorrhizae, if used correctly, will benefit growth of the entire plant, including the roots.
Generally, pesticides used as a foliar spray should not affect the fungi. However, pesticides used in the soil itself can have adverse effects and kill Mycorrhizae spores.
The Mycorrhizae spores will lay dormant in soil until they come in contact with a root, at which point they will colonize on the root. The spores are highly resistant to disease. So for the most part, the Mycorrhizae should stay alive and active for the entire life of the plant. If left dormant, the spores should live for at least two years.
Mycorrhizae will enhance nutrient uptake of the plant in a couple of different ways. The fungi release an enzyme which helps break down difficult to absorb nutrients like nitrogen and phosphorus. It also increases the surface area of the roots by as much as fifty times.
Of course. Mycorrhizae are fungi, which is totally organic. Everything the Mycorrhizae do to enhance the growth of your plants is certainly completely natural and fine for organic gardening.
The best time to use Mycorrhizae is when planting or transplanting your plants. Mycorrhizae works by attaching to the roots of the plants, so it is best used when you can put it in direct contact with roots.