Specific medicine for tomato sesame spot disease
Sesame spot is a common disease of tomato. It can infect leaves, petioles, pedicels and fruits. So, what are the specific drugs for tomato sesame spot disease?
First, what are the specific drugs for tomato sesame spot disease?
The specific drugs for the control of tomato sesame spot disease are 25% ammonia copper solution 500 times, 77% ammonia copper solution 400-500 times, 1 200 Bordeaux solution, 50% mixed sulfur suspension 500 times solution, 50% methyl topiramate wettable powder 600 times solution, and so on. The formula fertilization technology can also be used to spray 4000 times of the multi-effect liquid, or 1.4% of the compound sodium nitrate solution of 7000 times to improve the disease resistance of the dwarf; remove the residual body after harvest and turn it deeply in time.
Second, what are the symptoms of tomato sesame spot disease?
Tomato sesame spot, also known as brown leaf disease, it infects leaves, petioles, fruit stalks and fruits. The primary diameter of the leaf is 1-10 mm round or nearly round with obvious grayish-brown spots, the disease part becomes thin and sunken, with light, especially on the back of the leaf, which is different from other leaf spot diseases. Large spots sometimes appear wheel lines, when the humidity is high, there are dark brown mildew; petioles, fruit stalks are infected, the disease spots are gray-brown sunken, and black mold grows when the humidity is high; the disease spots vary in size, sometimes in strips.
Third, what is the incidence law of tomato sesame spot?
The mycelium overwintered with the disease residue in the field, and the conidia were produced when the conditions were suitable. By means of airflow and Rain Water, the host plant was splashed and invaded from the stomata, and the incubation period was 2-3 days. The suitable temperature for the development of the pathogen was 25-28 ℃ and suitable for pH6.5~7.5. It is easy to be popular in high temperature and humidity, especially in rainy and hot season. In addition, the vegetable field is wet and the growth of tomato is weak. the disease is serious due to over-dense planting, poor ventilation and poor light transmission or lack of fertilizer.
For tomato sesame spot disease to master the law of its incidence can be prevented, if not careful, timely treatment.
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