Red spider mites (Tetranychus Urticae) are a type of small 0.5mm mite from the Tetranychidae family, also known as Spider Mites, capable of spinning webs which is why they're often confused with spiders. They can be brown and deep red depending on the stage they're in. They tend to hide on the underside of the leaves and in their webs, allowing them to trap natural predators and protect themselves from certain types of acaricides.

Over the past few years, spider mites have been occurring more often in cannabis grows; they used to die off when winter rolled around outdoors. However, they can now stick around all year round indoors and in greenhouses, and combined with the increasing temperatures of our planet they can last for all year round anywhere they want, getting stronger each and every year.

Spider mites don't produce large markings on your plants unlike other infestations such as caterpillars, slugs or snails. However, spider mites can bite your plants leaves hundreds of times until they're absolutely covered in small grey dots; they absorb sap and empty out your leaves. When this infestation is in its most advanced stage it can cover buds with its webbing which can cause you to lose quite a lot of harvest.

Fusarium, also known as fusarium wilt, is a fungi-produced illness caused by fusarium fungi, and it’s quite common in cannabis and other grows. It’s also present in human beings in the form of skin and nail infections (dermatomycosis and onychomycosis).

The first ever fusarium reference can be found in the 30/40 in the URSS in a wheat infection. This infection was so bad that it was later used as a bacteriological weapon.

In cannabis plants, this disease affects mainly the roots and stems; your plants will lose strength, stop growing or flowering, and their branches or the plant in general may even begin to dry up, depending on the intensity of the attack. Fusarium wilt can affect indoor, outdoor and greenhouse grows, as well as appearing in all types of substrates; soil, coco coir, hydroponics etc.