What are the common pests and diseases in blueberry cultivation?
What are the common pests and diseases in blueberry cultivation? The main pests and diseases of blueberries include "stem-boring longhorn beetles", the larvae of "scarab beetles", white grubs, as well as common pest and disease conditions such as "leaf chlorosis", "leaf blight", "mummy berry disease", and "leaf-eating nettle caterpillars". With good control, they can be avoided. Control principles...
What are the common pests and diseases in blueberry cultivation?
The main pests and diseases of blueberries include "stem-boring longhorn beetles", the larvae of "scarab beetles", white grubs, as well as common pest and disease conditions such as "leaf chlorosis", "leaf blight", "mummy berry disease", and "leaf-eating nettle caterpillars". With good control, they can be avoided.
Control principles
First, adopt the principle of giving priority to prevention combined with integrated control, and achieve natural agricultural production ecological conditions as far as possible;
Second, adopt advanced application techniques to reduce pesticide dosage as far as possible, and advocate the selection of biological pesticides and chemical pesticides with high efficiency, low toxicity and low residue properties, and it is advisable to carry out alternating application scientifically and reasonably;
Third, when using chemical pesticides, the application regulations and standards of GB 4285 and GB 8321 shall be strictly followed.
Control methods
From mid-to-late April to early-to-mid May, a mixture of 50% carbendazim 400-600 times dilution and 80% dichlorvos emulsifiable concentrate 1200-1500 times dilution can be used for 2 treatments, with an interval of 10-15 days between the two treatments.
From mid-to-late August to October, use a mixture of 50% carbendazim 400-600 times dilution and 80% dichlorvos emulsifiable concentrate 1000-1200 times dilution, or 2.5% deltamethrin emulsifiable concentrate 1000-1200 times dilution, for 1-2 treatments; the specific measures should be taken according to the degree of pests and diseases in the field.
In late November, in conjunction with winter pruning, clear weeds, eliminate overwintering pests and diseases, and prune diseased branches and pest-infested branches, etc.
In December, in conjunction with deep plowing and winter pruning, plow the soil to a depth of 20cm, and focus on eliminating those pests that overwinter in the soil.
Precautions: when adopting chemical control measures, it must be ensured that 20 days before the blueberry fruit ripening period, and during the period before the end of harvest, the principle of no pesticide use is adhered to. In particular, highly toxic pesticides must not be used. If use is required, different pesticides should be considered for alternating use.
Blueberry fruit is rich in nutrients, but it must be ensured that there is not the slightest residue of chemical fertilizer or pesticide components in the fruit. Otherwise, the fruit will lose its proper commercial value. This will not only directly affect export sales, but also directly reduce economic benefit value. Therefore, the control methods adopted should consider ecological agricultural technical management and protection methods as far as possible.
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