Main pest control measures and common pesticides of pomelo fruit trees

Presumably, grapefruit is one of the fruits that everyone likes, but for grapefruit growers, if you want the grapefruit to grow a good grapefruit, you have to work harder. Here is the summary of the Chinese pesticide network for the growers: The main pest control measures and common pesticides of fruit trees are for reference only!
First, the disease 1, anthrax:
(1) Strengthen the management of orchard, pay attention to deep-turning the soil, increase the application of organic fertilizer, prevent partial application of nitrogen fertilizer, and pay attention to drainage after rain.
(2) Remove the diseased body in time, concentrate it on burning or deep burial to reduce the source of bacteria. In the winter, the Qingyuan sprays a Baume 1 degree stone sulphur mixture, and can simultaneously treat other pests and diseases.
(3) Spray 80% of anthrax fumarate 800 times solution in spring, summer, autumn shoot and young leaf stage, young fruit stage, 70% thiophanate-methyl (imported as methyl thiophanate) 700 times liquid plus 25% Mix bacteria spray powder, or 70% mancozeb 500 times solution (can also be used with charcoal, prochloraz, according to instructions).
2, scab disease:
(1) The new plant should be immersed in seedlings with 70% methyl thiophanate + 50% carbendazim 800 times for 30 minutes.
(2) Remove the primary infestation source, combine the pruning and clearing garden, cut off the residual branches and residual leaves, and burn them intensively. Chemical control, the first spraying in the spring bud sprouting, bud length 1-2 mm began to spray, with 50% carbendazim 800 times solution, 70% methyl thiophanate 1000 times solution, 75% chlorothalon powder 600 Double solution, 10% benzoquinone 1500 times (Shi Gao). The second time, when the flower falls 2/3, spray the above-mentioned fungicide or spray it once in a timely manner from May to June.
3, ulcer disease:
(1) Strengthen the quarantine of seedlings, and it is strictly forbidden to enter the newly planted orchard with diseased seedlings. The newly planted seedlings can be soaked for 10 minutes with 72% agricultural streptomycin 1000 times solution.
(2) Strengthen the management of fertilizer and water, do not apply nitrogen fertilizer, completely remove the residual branches, residual leaves, and residual fruits, and burn them intensively.
(3) The result tree begins to spray 72% agricultural streptomycin soluble powder 4000 times solution after flowering, 77% can kill 500 times liquid, and can also be used with neomycin and middle mycin (using instructions). The young trees are sprayed once every 20 days after the spring, summer and autumn shoots.
4, resin disease:
After the disease, there are two types of glue and dry, and the leaves are infected with sand. The first method of prevention and control is to strengthen management, antifreeze, anti-mite, avoid sunburn and various wounds to reduce the infection of various pathogens; secondly, to remove the diseased branches or diseased dry skin, the wound of the diseased part is coated with 70% methyl Tobuzin 100 times solution.
5, foot rot:
It mainly harms the root and neck, and the upper part of the ground can also be harmed. The first method of prevention and treatment is to use disease-resistant rootstocks. When planting, it should not be planted too deeply, and the position of the grafting interface should be properly improved. Second, the decaying cortex should be scraped off in time, and the healthy tissue around the diseased part should be scraped 0.5-1 cm, then at the incision. Apply 10% equal amount of Bordeaux pulp or 2-3% copper sulfate solution.
6, deficiency syndrome:
There are 6 kinds of magnesium deficiency, boron, zinc, manganese, iron and copper. The first method is to improve the soil and increase the application of organic fertilizer. The alkaline soil is mainly applied with organic fertilizer, green manure and acid fertilizer, and the alkaline soil is added with alkaline fertilizer. Secondly, the following agents are sprayed 1-2 times in the spring new shoot growth period. Boron deficiency spray 0.1 -0.2% borax solution, zinc deficiency spray 0.4-0.5% zinc sulfate, manganese deficiency spray 0.2-0.6% manganese sulfate, iron deficiency spray 0.3-0.5 ferrous sulfate solution, copper deficiency spray 0.1% copper sulfate solution. For the magnesium-deficient orchard, the weakly acidic or alkaline soil is applied with magnesium sulfate and the acidic soil is appropriately applied with calcium magnesium phosphate.
Second, pests 1, leaf miner:
(1) Combine cultivation and management to timely control the shoots, remove the premature and late new shoots, and make the summer and autumn shoot pomelo hairs neat and robust through water and fertilizer management, which is the fundamental measure to inhibit the insect source from controlling this insect.
(2) Protect and release natural enemies.
(3) Over the whole generation of the year, the chemical control can spray 2.5% Kung Fu or Laifuling EC 3000 times solution, 2% avermectin 2000 times solution or 20% chlorine horse EC 2000 times solution.
2, Swallow Butterfly:
(1) Killing larvae and mites. In order to protect the natural enemies, the cockroaches can be placed in the garden in the sarong, and the parasitic bees fly out and then parasitize.
(2) Protect and attract natural enemies.
(3) Chemical control: 40% chrysanthemum emulsifiable concentrate 1000 times solution, 90% trichlorfon crystal 800-1000 times solution, 80% dichlorvos or 50% chlorpyrifos 1000 times solution or 2% avermectin 2000 times, 5 % A vitamin salt 3000 times.
3. Aphids:
(1) Cut off the damaged shoots and protect the natural enemies.
(2) Reproduction throughout the year, no dormancy, chemical control before the early spring germination spray 5% diesel emulsion to kill eggs or combined with killing and killing spray oil emulsion.
(3) Spraying 50% anti-Suiwei powder 2000 times solution, 10% imidacloprid or pymetrozine 1500 times, 10% cypermethrin 3000 times solution, 20% chlorpyrifo 2000 times solution, 2.5% kungfu emulsifiable concentrate 3000 times solution 10% acetamiprid 2000 times liquid, each pesticide is rotated.
4, hibiscus, whitefly:
(1) Before the early spring germination, combined with the prevention and control of scale insects, aphids, red spiders, spraying diesel oil with 5% oil content, poisoning the winter nymph has a good effect.
(2) Spray protection: Spraying 2.5% Uranus 6000 times liquid, 80% dichlorvos 1500 times liquid, 20% chlorpyrifos 1000 times liquid or 10% imidacloprid 2000 times liquid, plus 90% enemy 800 times liquid of worm, 1500 times of pymetrozine.
5, rust niches:
(1) Strengthen the management of fertilizer and water.
(2) Protect the use of natural enemies.
(3) May-September is a high-risk period, with 6000 times liquid of Uranus emulsifiable concentrate, 2000 times of 73% gram of emulsifiable concentrate, 3000 times of 5% of sputum emulsifiable concentrate, and 1 degree before flowering or winter. Stone sulphur mixture or 45% crystal sulphur mixture 150-300 times solution, 40% sulphur sulphur emulsifiable concentrate 1500 times solution, 20% sulphur emulsifiable concentrate 3000 times solution, 25% triazole tin powder 1000 times solution, 50% Solang emulsifiable concentrate 1000 times solution, 2% avermectin 3000 times, pay attention to the rotation of each drug, can delay the development of drug resistance.
6, red spider:
(1) Strengthen the management of fertilizer and water and protect the use of natural enemies.
(2) Red spiders overlap in generations, re-issue every spring and autumn, and refer to the above-mentioned rust wall scorpion prevention and control measures for the disease control. In addition, 2% avermectin EC 2000 times solution and 57% bismuth emulsifiable concentrate 2000- 3000 times solution, 20% dicofol 1000 times solution, 25% triazole tin WP 1000-2000 times solution, 12.5% ​​thiazide · 哒螨 1500-2000 times solution, endangered 4000-5000 times, etc. Pharmacy rotation is used.
8, Tianniu:
(1) Killing adult worms, assassination of eggs and newly hatched larvae.
(2) After the hatching of the beetle, it will be subcutaneously, more than the stem, the root neck, and the larvae, and the larvae can be smear with 80% dichlorvos emulsifiable concentrate 10-50 times to smear and poison the first larvae; The larvae can use a thin wire hook to hook out the manure from the ventilating drain hole, and then insert 1-2 80% dichlorvos or 40% dimethoate 10-50 times liquid cotton ball, or inject 80% dichlorvos EC 500-600 times liquid Insert a half of the aluminum phosphide sheet and seal it with wet mud after application.
(3) Whitening within one meter of the trunk, preventing adult eggs from spawning has a certain effect.
9. Beetle:
(1) Strengthen comprehensive management to make ventilation and light transmission good.
(2) Cut off the severe branches of the mites and burn them.
(3) Chemical control, the first choice is 40% speed emulsified milk 800-1000 times liquid (or domestic 40% chlorpyrifos 800 times liquid), 80% dichlorvos emulsifiable oil 800 times liquid, Muwangte (spider acetyl ester) 4000 Times, the above pesticides can be mixed with 20% chlorpyrifos or 10% hydrazine powder 1000 times solution, 2% avermectin 2000 times solution, winter 3-5% oil emulsion, rosin mixture 8-10 times solution (Rose fat mixture ratio = caustic soda 2: rosin 3: water 10), chemical pesticides and oil emulsions have a better mixing effect.

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