June: Mangzhong (June 5) – Summer Solstice (June 21)
Climate: Abundant rainfall and significantly higher temperatures
Citrus phenology: summer shoot growth period, young fruit expansion period, physiological fruit fall period
During the expansion period of citrus fruits and the period of summer shoots, agricultural activities are mainly based on the control of summer shoots and the prevention of diseases and insects.
Agricultural management work is as follows:
1. Wiping bud control summer shoots: The method of wiping buds and controlling summer shoots is the same as before.
2, orchard coverage: the use of stalks and other cover tree tray drought prevention.
3, topdressing: can be used humic acid water-soluble fertilizer + a large number of elements water-soluble fertilizer flushing
Applying, while topdressing, combined with spraying 1 to 2 times foliar fertilizer, to promote fruit expansion.
Major pest control in June
1. Main diseases and insect pests: anthrax, scab disease, black rot, lipid spot macular disease, ulcer disease, red spider, weevil, shell insect, butterfly larvae, rust spider, aphid, wood lice, etc.
Wood lice
Elephant armor
Red Spider
Ulcer disease
Scabs
Insects
Lipid spot macular disease
anthrax
Sand skin disease
Black rot
2. Disease prevention and control in May and June:
(1) Canker disease: young trees are sprayed once a time 20 days and 30 days after the ends; adult trees are mainly fruit-preserving, and sprayed once every 10 days, 30 days and 50 days after flowering (3% gram fungus kang wettable powder 1000 times, before the onset of the disease or 77% copper calcium sulfate wettable powder 1000 times liquid for perdition. )。
(2) Black star disease, anthrax, sand skin disease and greasy spot disease: 10-40 days after the citrus flower is sprayed with 10% phenylethocycloazole water dispersible granule 1500 times or 80% Daisen manganese zinc wettable powder 600 times or 70% propensian zinc wettable powder 600 times or 25% pentazool suspension 3000 times, interval 15 days, 2-3 times continuously.
3. Pest control in May and June
(1) Mesozoans: Mid-May is the peak period for hatching of larvae, and should be sprayed in time for control, twice in a row, with an interval of 15 days. The agent can be used 40% rapid culling emulsion 1000-1500 times liquid or 20% phosphate emulsion 1000-1500 times or 48% chlorpyrifos emulsion 1000 times.
(2) Red spider: Frequently check the insect situation, find that there are more than 20% of the insect leaves, and the average red spider per leaf is more than 2 heads to spray in time. The agent can be 50% Tolk wettable powder (g mite tin) 2000 to 2500 times 5% Nissolan emulsion 3000 times liquid or 25% triazoltin wettable powder 1500 times liquid.
(3) Rust ticks: pay attention to check the insect situation, 20% of the leaves and fruits found to have rust ticks, should be sprayed immediately for prevention and control. Pesticides can be used 1.8% avermectin emulsion 2000-3000 times or 2.5% cypermethrin emulsion 3000 to 5000 times or 73% g mite emulsion 2000 times
(4) Tianniu: Continue to tour the orchard and scrape off the eggs and larvae of tianniu. For the light shield green bull that harms the branches, the damaged branches can be cut off to eliminate the initial larvae; hook to kill the larvae, that is, in the last second hole of the affected branch, plug with the twig infarction, so that the larvae cannot move upwards, and then stab from the hole into the hook to kill.
(5) Gidding insects: June is the peak of larvals, according to the characteristics of the glue, scrape the larvae with a knife.
(6) Citrus whitefly: the control method is the same as that in April, and it can also be controlled by motor oil emulsion 100-150 times plus organophosphorus agent.