Do not use drugs as viruses

After the beginning of autumn, several households of melon growers in Chengguan Town, Jiyang City reported that the melons planted in the sheds had a viral disease and did not improve after spraying multiple antivirus medicines. After the author's fieldwork, it was found that the growing point of muskmelon was shrinking, the leaves were hypertrophied, the surface was yellow, and basically stopped growing. From the surface, it looked like virus disease. But look at the entire greenhouse melon, 2.5 acres of melon is almost 100% of this symptom, according to past experience, if the virus is mostly local or partial disease. After inquiring melon farmers, they had just sprayed two leaf foliar fertilizers a few days ago. The main ingredient of the foliar fertilizer used was sodium nitroprusside, which was a plant growth regulator and was used excessively and was prone to occur. Hormone poisoning inhibits normal crop growth.

There are many examples of this kind of mistakenly causing harm to the virus, because sometimes the symptoms of viral disease and hormonal intoxication are similar. If you do not carefully identify, there are often “misjudgments” that miss the best treatment period.

Hormone poisoning is different from the phytotoxicity caused by bactericides and insecticides. Once it occurs, it will affect growth, and it is difficult to recover severe cases in the season. In production, hormonal intoxication is often caused by improper use or improper use of foliar fertilizers to cause hormonal intoxication when the flower is spotted, sprayed, or picked up.

Symptoms of melon virus disease are often localized first, and the leaves are victimized. The veins appear chlorotic. Generally, young leaves first show symptoms. Sometimes there are multiple dark green spots protruding to the front on the top leaves, and the leaves shrink and curl. Different shades of leaves have mottled mosaicism. In the case of fruit damage, many round or irregular water spots appear on the surface of the melon. After the lesion becomes light brown, the spots are sunken, and the melon flesh of the rind corresponding to the spots is lignified and brown. Necrotic, the whole melon is stiff and loses food value.

Relieving melon hormonal poisoning can promptly spray 3000 times natural alizarin lactone - Shuofeng 481 or cell division 2 ~ 3 times, can alleviate the harm caused by hormonal poisoning.

Prevention of melon virus disease should mainly control the disease from the source. Summer heat and anti-virus melon varieties should be selected. Cover insect nets in vents of greenhouses to prevent insects from entering. Chemical control can be sprayed with 50% Chlorobromoisocyanuric acid soluble powder or 20% virus A morpholinium copper WP wettable powder 500 times liquid spray or ciprofloxacin (ene carboxymorpholine quinone) 1000 times, and pay attention Rotation medication.

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