#Challenge 30 Days to Write a Diary in the Headlines #Iris is derived from the Greek name "Alice" (the rainbow goddess in Greek mythology), which means "to resurrect life" and is a symbol of light and freedom. The Israelites regarded irises as "gold" and had the custom of planting irises to "bring wealth to the afterlife."
Image: Beautiful iris plants and flowers
Iris is also known as "black kite" and "flat bamboo flower". Because its appearance resembles a dancing butterfly, iris is also called "purple butterfly" and "blue butterfly". It is a perennial root erect herbaceous plant in the family Iris family.
The irises bloom in early summer, which is currently the "best viewing period". Peng Chengxu said in his "Iris in a Dream" that iris is:
"The crumbled rainbow, like a wandering affection, pervades the wasteland,
Exquisite elegance, spread out a season of fragrance, the front edge of delay,
Admired or missed by the past, wantonly dyed."
"Butterflies stretch their light dance steps, use tormenting rituals, from the red dust of wandering desire through the past, in the lingering longing for distant places, interpret the holy flower language."
Image: Planted iris plant
"Through the light blue and deep purple, we seem to see the poignant Liang Zhu, and the fleeting fate, meditating on the depths of the soul."
The iris petals are very large, the color is very beautiful, the flowers are rich, there are blue, purple, yellow, white, light red and other colors. Coupled with its unique flower type, it has become a "coquettish" among flowers and plants, enjoying the reputation of "blue fairy" and has been favored by many people.
Although the iris grows strong, the root system is thick, the leaves are strong, and it has strong vitality, but in the process of growth and development, it will still encounter various pests and diseases, so that the "appearance" of the iris is "damaged", so strengthening the prevention and control of iris field diseases and pests is an indispensable and important part of the daily management of irises.
In this issue, Qingjiang Crane will focus on and chat with all the relatives and teachers about the topic of comprehensive prevention and control of diseases and pests in the planting process of iris, I hope you like and actively participate in interactive comments, forward and share the pictures and texts of this issue.
Image: Iris flowers of different colors
Three "malicious" diseases that "destroy" the appearance of iris:
There are mainly brown spot disease, rust (yellow mildew), and bacterial soft rot of iris.
Brown spot disease of iris:
(1) Manifestations of iris brown spot in the field:
After the iris brown spot pathogen is safe on the diseased body for winter, the iris plant is infected with the help of natural vector rain or running water in the spring of the following year to "latent" the source of the disease.
Image: Planted iris base
After repeated infestation, it begins to manifest itself on the leaves of the iris. The diseased leaves bear rounded brown spots, which worsen over time and the disease spots expand. Finally, a large disease spot with a yellowish edge and a dark brown color is formed, and there are "water-stained" haloses. When the air is humid, there are small gray-black particles (also known as "gray-black mold").
When many brown disease spots on the leaves fuse with each other, the leaves form "spot withering", lose photosynthesis and the tissue dies.
(2) Chemical prevention and control measures of iris brown spot in the field:
Image: Iris in different colors
At the beginning of the onset of iris brown spot, 30% difenoconazole propiconazole water agent 800~1000 times liquid, or 50% difenoconazole azoxystrobin water agent 2000~2500 times liquid, 40% fluorosilazole emulsion 8000~10000 times liquid or 5% imilazole emulsion 3000~3500 times liquid, 50% methyl thiophanate sulfur 500~800 times liquid or 70% methyl thiophanate wettable powder 800~1000 times liquid, or 30% oximyl suspensions 2500~ 3000 times liquid spray, or 20% eugenin suspension 2500~3000 times liquid, or 25% pyraclostrobin wettable powder 2000~2500 times liquid, or 65% daisen zinc water dispersible granules 500~600 times liquid, or 70% daisen water dispersible granules 500~800 times liquid spray stem and leaf treatment.
Powdery mildew (rust) in iris:
(1) Pathological manifestations of iris powdery mildew (rust) in the field:
Image: Artificially improved iris plant
Powdery mildew in iris is actually rust, and the name of the disease comes from the "summer spore pile" (rust powder blister) that appears on the iris plant, and after the rust blister ruptures, it will emit a rust-colored powder.
The growth and development of iris plants suffering from yellow mildew are weak, the flower shape becomes small, the flower quality becomes deteriorating, the leaves fall early, and the leaves are yellow and dead when the damage is serious.
(2) Chemical prevention and control measures of iris powdery mildew (rust) in the field:
It can be used after the occurrence of central disease in iris plants in the field, with 25% triazolone pentazole wettable powder 800~1200 times liquid or 15% triazolone wettable powder 500~800 times liquid, or 66% dicyanatoquinone water dispersible granules 1000~1200 times liquid, 5% oxime amine emulsion 800~1000 times liquid, or 60% difenoconazole azoxystromin aqueous dispersible granules 2500~3000 times liquid spray.
Image: Iris in different colors
Or 60% Wuningmycin conazole flusilazole water agent 3000~3500 times liquid, or 60% pyrimidol chlorothalonitrile niproxidazole wettable powder 800~1200 times liquid, or 60% pyrimidoximidate flusilazole emulsion 800~1000 times liquid, 50% azoxycyclic amine aqueous dispersible granules 800~1000 times liquid spray stem and leaf treatment.
Bacterial soft rot in iris:
(1) Pathological identification characteristics of iris bacterial soft rot in the field:
Iris bacterial pathogens overwinter safely on soil or disease residues, and the following spring pathogenic bacteria invade iris plants from iris plant stomata or wounds (such as pest wounds, wounds caused by artificial agricultural operations, etc.) with running water or rain and invade the leaves or rhizomes.
Image: Iris of different colors planted artificially
Leaf infection produces distinct "water-stained" stripes that quickly "conduct" to the iris rhizome. Makes the internal tissues of the rhizome brown and rot, with a foul odor.
Diseased iris plants are unable to draw nutrients and water from the soil due to the deterioration and decay of the rhizome, so that the leaves of the aboveground plants are wilted, and the rhizome is easy to uproot without new root development. When severely affected, aboveground plants "detach" from underground rhizomes.
(2) Chemical prevention and control measures of iris bacterial soft rot in the field:
Image: Different iris plants planted artificially
After the central disease strain appears in the iris in the field, 80% allicin emulsion 800~1000 times liquid or 80% allicin chloramphenicol emulsion 800~1000 times liquid, or 20% dichloroisocyanurea wettable powder 500~600 times liquid, or 51% Shenzinomycin penicillin wettable powder 800~1000 times liquid, or 20% thiococcal copper suspension 500 times ~ 600 times liquid, or 47% palinomycin king copper wettable powder 500~800 times liquid, 30% Copper oxychloride suspension 500 times ~ 600 times liquid spray, or 77% copper hydroxide wettable powder 600 ~ 800 times liquid, or 86.2% cuprous oxide wettable powder 800 ~ 1200 times liquid, or 50% yellow net methocarbendazim indoacetic acid water agent 1000 ~ 1200 times liquid spray stem and leaf treatment.
Image: Iris planted in a city park