There are more than 160 kinds of camellia oleifera pests and diseases, and there are more than 20 kinds of types that can cause harm.
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Black-eyed Celestial Bull. Also known as oil tea red neck blue wing tianniu, oil tea blue wing tianniu, tea red neck tianniu. </h1>
Pest condition: Larvae moth infestation of branches. Often around the bark layer of the tea tree, and then moth into the dry heart as a pest, the victim formation of a number of nodular nodes, light growth is poor, heavy easy to break or die, the impact on the oil tea tree potential and yield is very large.
Morphological characteristics: adults are 9–12 mm long, the body is covered with long vertical hairs, the head is orange-yellow, the compound eyes are black, the larvae are 18–22 mm long, yellowish white, and the head is yellow. The pupa is about 10 mm long and orange-yellow.
Life habits: 2-3 years and 1 generation, respectively, the larvae of the previous year and the current year overwintered. When adults lay eggs, they bite the bark into crescent-shaped grooves and then lay eggs under the cracked cortex of the grooves.
(1. Adults; 2. larvae; 3 larval head and dorsal plate of the forebreast; 4. Pupae; 5. Camellia oleifera trunk is harmful)
Prevention and control methods:
(1) Strengthen the management of care and prune and kill insects, and cut off and burn the flat ring marks of the affected branches.
(2) Artificial capture of adult insects. During the feathering of adult insects, they can be artificially killed every morning.
(3) Protection and utilization of natural enemies. It takes 2 years to complete 1 generation, and the larval stage is long, and natural enemies in the larval stage such as the yellow-winged black-billed bee help to control its population.
(4) Chemical control. In fine weather in August, a 20% dilution of 40% oxidized fruit is applied to the lower part of the insect nodes to kill the old larvae.
Tea Tianniu. Also known as neem tree tianniu, tea brown tianniu. </h1>
Pest situation: The larvae are harmful to the main trunk of camellia oleifera and penetrate deep into the roots, which seriously affects yield and tree growth.
Morphological characteristics: Adults are 23–33 mm long, grey-brown, and the wings are yellow-brown with a silky luster. The eggs are milky white, oblong-oval, with a slightly sharp tip at one end. The larvae are 30–45 mm long and milky white. It is about 25 mm long, milky white, and the compound eyes are black.
Life habits: In Jiangxi 3 years and 1 generation, the 1st and 2nd years as larvae overwinter. The larvae can moth more than 1 foot deep along the main root, the worm path is large and curved, and a large number of moths are discharged out of the hole, and the pupae are mostly in the root neck.
(1.Adults; 2.Larvae;3.Pupae;4.Damage)
(1) Combined with camellia oleifera reclamation, cultivate soil and bury the root neck to reduce the chance of adult insect spawning.
(2) Before the emergence of adult worms, brush the main trunk and root neck with white coating agent to prevent egg laying.
(3) Artificial capture during adult occurrence.
(4) Pharmaceutical prevention and control. Inject 10% imidacloprid wettable powder 1500 times liquid into the cadres of the insect trees, and then seal the opening with clay clumps.
Tea weaving sickle moth. Also known as camellia oleifera borer, tea branch moth, tea drill heartworm, is the main pest of camellia oleifera. </h1>
Infestation: The larvae eat the branches, causing the leaves to wither and the upper branches of the moth path to die. Ten-year-old young trees are the most seriously damaged, often dying in their entirety.
Morphological characteristics: Adults are 16–20 mm long with two circles of white spots in the center of the forewings. Ovate purslane, pale beige, with a reticulated engraving, scattered. The larvae are 25–30 mm long and have a yellowish-brown head. Pupae are 18–20 mm long, yellowish-brown, with a pair of protrusions at the end of the abdomen.
Life habits: 1 generation per year, with larvae overwintering in the infested branches. Adults are phototropic and lay eggs at the base of the apical bud, one grain each. The hatching larvae are sheathed by leaf axillary moths, and later moths from top to bottom to eat xylem, at intervals of a certain distance, there is a circular excretion hole, excreting yellow-brown granular feces, which is the main feature of this insect pest. If pupated, the feathered hole is enclosed by a filament membrane on the outside.
(1) Strengthen the management of forest land. From July to September, the affected branches are pruned, burned in a concentrated manner, and the woodland is cleaned to reduce the breeding environment of diseases and insects.
(2) Physical prevention and control. Adults are booby-trapped by black light during their peak feathering.
(3) Chemical control. If necessary, use a degreasing cotton dipped in 80% dichlorvos emulsion 40-50 times the liquid, stuffed into the worm hole and sealed with mud to poison the larvae.
Tea moth. Also known as tea moths, tea moths are mainly harmful oil tea, tea tea and camellia.
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Infestation: The hatching larvae feed on the leaf flesh, forming yellowish transparent spots. In late autumn, the summer and autumn shoots of that year are turned, and the leaves gradually wither and die.
Morphological characteristics: Adults are 5–7 mm long, dark grey with metallic luster, eggs pale yellow, oval in shape. The larvae are 8–10 mm long, with a small head, dark brown, and underdeveloped gastropods. The pupa is 5–7 mm long, yellowish brown, nearly cylindrical, with a pair of upwardly protruding protrusions at the end of the abdomen.
Life habits: 1 generation per year in most areas. Larvae overwinter within tea shoots or leaves. Adults are phototropic, and the hatching larvae dive from the back of the leaf to eat the leaf, forming a submersible spot with a diameter of 3-5 mm, and the borer holes are mothed in the branches of the moth.
(1.Adult; 2.First hatchery food damage latent; 3.Larvae; 4.Pupa; 5.茧; 6.Damaged diseases; 7.Damage)
(1) Strengthen the quarantine of seedling transportation to prevent spread.
(2) Cut off the stalks, place them in the sarongs in the forest, and burn them before the adult tea moth feathers after the parasitic bees are feathered.
(3) According to the characteristics of adult tea moths with strong phototropism, black light is used to trap and kill.
(4) From May to June, the severely affected forest stands should be made of 40% oxidized Leguo 2.0% solution and an appropriate amount of yellow mud to make a medicinal slurry, and the trunk of the tree was painted.
(5) When the overwintering larvae turn moths in mid- and late April each year (that is, the spire hazard), spray or spray powder with white zombie bacteria containing 2×108/ml of spores.
Original author: Zeng Ganlin, "Green 985" public number, Yunzhongdi service purpose: an attitude, focus on the field of agriculture in the field of agriculture, to help farmers popularize the knowledge of planting technology, to solve farmers' problems. Thank you!