Some vines were dying and we looked for the source of the problem. Took some root and soil samples and sent them to the respective labs. I got the results back, and it is not good results, but at least we can treat the cause now.
Firstly, there are big problems concerning Nematodes. Nematodes are microscopic worms. Some are parasitic, some not. These (ring nematode and root-knot nematode) are the parasitic types. They feed on the root system of the plant, eventually destroying the complete root system and the plant dies. Nutrient and water uptake become severely compromised.
Nematode next to a soybean under an electron microscope
Then there is Pythium and Phytophthora. Both are considered a fungi-like organism. They are also parasitic and feeds on the root system. The word Phytophthora is derived from the Greek words meaning "plant-destroyer". Phytophtora can literaly destroy a plant within a year, as is the case with this Shiraz.
Phytophthora forms
Phytophthora forms: A: Sporangia. B: Zoospore. C: Chlamydospore. D: Oospore.We are acting immediately to erradicate these pathogens. In conjuction with combating these pests, we need to stimulate rootgrowth significantly to help the plants overcome this intense stress period. Root stimulating foliar sprays will be applied, also adding vast amounts of compost to stimulate finer root growth in the top region.
This situation will be re-assesed after harvest season.
No comments:
Post a Comment