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Is there a good way to rot blueberry Phytophthycogenus root?
1. Symptoms of onset
Blueberry Phytophthycosis root rot often occurs from the neck of the blueberry root close to the surface, causing the epidermis to rot and soften, further causing xylem discoloration, causing the upper branches and leaves of the blueberry plant to dry up, the leaves dry and more without falling off, hanging on the branches, and more symptoms from several branches or the whole plant.
The root tips and fine roots of the affected plants were not obvious in the initial stage of plant drying, and the root color was basically normal. The disease occurs rapidly and heavily during the rainy season when the soil is heavy or the soil is not in place, and the blueberries in the South High Bush are more serious than those in rabbit eye varieties.
2. Prevention and control methods
At present, the effective agents for the prevention and treatment of blueberry Phytophthycosis root rot are oleyl morpholine, pyrimidyl ester, flumorpholine, aluminum triethylphosphonate, clonylonitrile, bacillus, pulex, downy mildew, methotrex and sperm. The more cost-effective agent is still clonystonitrile and methyl cream, in order to expand the scope of disease prevention and improve the prevention effect, it is often mixed with xanthocylvic.
(1) Soil treatment: each plant is 1 gram of 25% methyl frost linitic powder plus 70% xyperm wettable powder 0.3 g, dissolved in water and then mixed into 50 grams of fine dry soil sieved, that is, the ratio of methyl frost ling: xyrrheal: fine soil is 1:0.3:50. When used in the early stages of the disease, the medicinal soil can be directly applied to the surface of the neck of the blueberry root in the planned amount.
(2) Liquid irrigation: In the early stage of the disease and surrounding plants, the effect of alternating root irrigation with methyl cream spirit + xanthocete + jiamei dividend 1000 times liquid; or purik + xyrrhocene + antivenom alum + jia mei dividend 1000 times liquid alternate root irrigation effect is better.
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How to control scarab beetles in pollution-free blueberry orchards?
Blueberry scarab beetle pests mainly include the patina golden turtle, the southeast large black gill golden turtle, the dark gill golden turtle, etc., mainly the scarab beetle larvae are harmful to the blueberry roots, biting and biting off the whisker roots, making it difficult for the plant to absorb water and fertilizer, showing symptoms of water shortage, and causing the death of young trees. Adult scarab beetles like to eat blueberry leaves, flowers, fruits, etc., which can also cause different degrees of harm.
Measures such as "combined control underground, inside and outside the park" can be taken to control scarab beetle pests.
1. Manual hunting
In the evening of the adult scarab onset period (June-July), lay a plastic sheet under the tree tray, shake the branches, and collect the adult scarab beetles that vibrate on the plastic sheet.
2. Booby trap
Every 2 hectares of orchards can be installed with a frequency vibration insecticidal lamp or black light, under the insecticidal lamp placed a basin or tank, so that the lured scarab insects fall into the water and die, you can also set up a sweet and sour liquid (1 part brown sugar, 4 parts vinegar, 10 parts water) booby trap pot in the blueberry garden for booby traping.
3. Spray food repellent
It can be sprayed with 1:2:160 times bordeaux liquid on the foliage to make the leaves gray-white, which can avoid scarab pests for feeding.
4. Irrigate the roots
The use of white zombie preparation or pyrethroid preparation + Jiamei dividend 1000 times liquid leaching root irrigation, control of scarab larvae grub grubs in blueberry rhizosphere soil.
5. Treat insects outside the park
During the adult outbreak season, spray 20% chloranthroid benzamide suspension 5000 times liquid or 4.5% high-performance cypermethrin emulsion 2000 times liquid + jiamei point 1000 times liquid to control scarab beetle pests on the trees around the blueberry orchard.
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How do pollution-free blueberry farms control fruit flies?
Adult fruit flies lay their eggs under the near-ripe blueberry peel, and after the eggs hatch, the larvae are infested with the fruit, and as the larvae eat, the fruit gradually softens, browns, decays and falls off. The insect is only harmful to near-ripe, ripe and decaying blueberry fruits, the higher the ripeness, the more harmful it is; 1 blueberry fruit can be infested by multiple fruit flies at the same time, and there are multiple insect eyes on the peel.
Prevention and control measures:
1. Clean the countryside
Remove the rotten organic matter and garbage in and around the blueberry orchard, and spray 50% fly killing amine wettable powder 2000 times liquid or 20% chloranthrine benzamide suspension 5000 times liquid + Jiamei cent 1000 times liquid on the ground and the surrounding barren grass slopes to reduce the insect source base.
2. Timely and fast harvesting
Timely drip irrigation per acre or flush Jiamei bonus 1 bag + Jiamei brain platinum 1 bag, promote fruit coloring and sweetness, early picking, in order to reduce the attractiveness of fruit to fruit flies, reduce harm.
3. Remove the fruit
During the ripening and harvesting of blueberries, the fallen fruits and rotten fruits inside and outside the garden need to be cleaned up, so as to avoid the fruit flies on the fruit from being harmed in the garden after survival and reproduction.
4. Booby traps
(1) Insecticidal lamp
Solar vibration frequency insecticidal lamp, using the light-oriented nature of insects, the use of light sources to induce insects with phototropism for centralized killing. The installation of insecticidal lamps plays an indirect role in controlling fruit fly hazards: killing some phototropism insects with sharp mouthpieces and reducing borers, fallen fruits and diseased fruit.
(2) Armyworm plate
The use of fruit flies on the color of the tendency to induce, play a direct role in the killing of fruit flies.
(3) Fruit fly sex attractants
Fruit fly sex hormones are used to induce the aggregation of monosexual fruit flies and carry out centralized killing. Drosophila estrogen induces male Drosophila, and Drosophila and androgen induce female Drosophila, causing a sex imbalance in the Drosophila population and directly inhibiting the appreciation and reproduction of the Drosophila population.
(4) Sweet and sour liquid
Using the tendency of fruit flies to acid, rot and sweetness, sugar, vinegar, wine and water are mixed in a certain proportion to make a sweet and sour solution, which induces fruit flies, and then adds appropriate insecticide to the sweet and sour liquid to kill the induced fruit flies. Sweet and sour liquid can directly trap and kill fruit flies.
The ratio of sweet and sour liquid is white sugar: alcohol: acetic essence: water = 1.5:1:1:10, which is now used when used. After the preparation, it is packed in a plastic bottle, 20 bottles per acre, hanging in the shade of the canopy of the blueberry garden, with a height of 0.5-1.0 meters, and regularly removes the adult insects induced in the bottle, and replaces the sweet and sour solution once a week.
This article was written by cathay pacific's technical team
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