The latest course of techniques and methods for pest control of marigold
Marigold has fewer diseases and insect pests, mainly standing blight, black spot, powdery mildew, stinging moth, shell insects and other diseases and insect pests. In the process of prevention and control, we should adhere to the principle of prevention first, prevention is more important than treatment, and timely prevention and control. Let's take a look at the pest control techniques of marigold.
Black spot disease
[incidence characteristics] Black spot mainly affected leaves, petioles and tender shoots. At the beginning of the disease, purple-brown to brown spots appeared on the front, and after enlargement, most of them were round or amorphous dark-brown spots.
[control methods] carbendazim, thiophanate methyl, daconine and other drugs can be sprayed.
Powdery mildew
[disease characteristics] powdery mildew invaded tender leaves, white powdery substance appeared on both sides, and the early symptoms were not obvious. five days after the appearance of 3Murray in the powdery mildew layer, the leaves showed water stains, gradually lost green and turned yellow, and caused leaves to fall off in case of severe injury.
[control methods] carbendazim and triadimefon were sprayed during the onset period, but the effect of Guoguang Inna was the best.
Leaf blight
[characteristics of the disease] most of the leaves were invaded by the tip or margin of the leaves, which were small yellow spots at first, and then rapidly expanded into irregular spots. The withered area of the seriously damaged whole leaf reached 2 × 3 of the whole leaf, chlorosis and yellowing of the diseased part, brown dry and shedding.
[prevention and treatment methods] Comprehensive prevention and treatment should be taken when the disease occurs, and fungicides such as carbendazim and methyl topiramate should be sprayed.
Spodoptera litura
[harmful characteristics] the larvae of Spodoptera litura, Plutella xylostella, Spodoptera litura, Plutella xylostella and Spodoptera litura ate a lot of leaves in high temperature season.
[control methods] as soon as it is found, it should be sprayed with 90% trichlorfon crystal 800x solution or 2.5% fenvalerate EC 1500 times solution.
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The latest South African marigold planting techniques and methods course
South African marigold is a perennial herbaceous flower with perennial roots of Compositae, which is native to South Africa. In recent years, it has been introduced to China from abroad for cultivation of 2012 grass flowers. It is a rare flower material whether it is used as a potted flower desk or as landscaping in early spring. Let's do it together.
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The latest breeding method of marigold
Marigold, which has auspicious meaning, has long been regarded as a flower of respect for the elderly. It is native to Mexico. It has no strict requirements for soil. It is good to fertile and well drained sandy loam. It likes warm and humid environment with sufficient sunshine. It mainly reproduces by seeds or cuttings.
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