It is not easy to cultivate a citrus tree, from seedlings to productive three or four years, how much time and energy it takes, only the citrus growers themselves know.
Dodged yellow dragon disease, canker disease, red spiders, and watched the small trees grow day by day. However, some trees have been abundant, there is no disease on the leaves, and the whole tree or some branches have inexplicably withered. Citrus growers should be careful, pests may be happy in the trunk.
Popper larvae
<h1>Drill heartworm classification</h1>
There are many species of heartworms on citrus, belonging to different families, some belonging to lepidoptera, such as the coffee leopard beetle moth, the Asian corn borer, and the little bat moth. Some belong to coleoptera, such as celestial bulls, poppers and so on. These moths have different habits, but the larvae are good at drilling holes, burrowing in the branches, growing, causing great harm, concealment and very difficult to control.
Celestial bull larvae
<h1>Cerambycidae</h1>
The celestial cow is a common moth on citrus, and the larvae moth near the ground eat the trunk and large roots of citrus, causing the cortex at the base of the trunk to necrosis and fall off, commonly known as "bib". The larvae feed on the xylem for a long time, the moths twist and turn, and the fruit trees gradually weaken and die. There are several main varieties of celestial cattle that harm citrus:
1. Star Celestial Bull
The larvae mainly decay the main trunk and large roots, and may to June is the main feathering and spawning time of the adults. The eggs are mostly within 5 cm of the trunk from the ground. Eggs are laid by biting the cortex into an L-shaped wound.
The larvae turn into xylem after 2-3 months of subcutaneous moth ingestion, forming tunnels.
Figure 3 Star Celestial Bull
Figure 4 Day cattle larvae
2. Brown Celestial Bull
The brown ox mainly harms the main xylem, characterized by the viscose of feces, attached to the orifice and falling on the leafy ground.
Figure 5 Celestial Cow Larvae Source: Small Orange Lantern
Figure 6 Viscose feces Source: Primary color atlas of citrus pests and diseases
3. Light Shield Green Sky Bull
The larvae of the Light Shield Green Celestial Bull erode small branches of citrus, causing the branches to wither.
Figure 7 Light Shield Green Sky Bull Source: Network
Figure 8 Larva Source: Video screenshot
<h1>Gidinko</h1>
1. Popcorns
The purping insects of the Family Giddingaceae are also common moths, which are distributed and harmful in citrus areas, and are heavily harmed by broad-skinned oranges and oranges. The larvae mainly moth the trunk and branches. In the phloem do not form layers of radial curved worm tracts. The bark of the victim bursts and flows gum, and the tree body weakens and withers.
Figure 9 Skin Bugs
Irregular occurrence is the first hazard peak in mid-to-early May, and the second hazard peak in mid-to-late September. Fruit trees with rough bark and many cracks are more severely affected.
Figure 10 Popworm hazard Source: Network
2. Big burst skin worm
The scientific name is Six Star Giding, and the adult and larvae are larger than the blasters, and the moths are relatively wide and non-radial. From the main branch to the vicinity of the graft interface, the tree weakens or even dies. May to June is the high incidence period every year.
Figure 11 Six Star Giding
<h1>Lepidoptera borers</h1>
There are many species of moths in Lepidoptera, and it is not easy to control. After the branches are damaged, they wither and dry, and the tree weakens. Many growers know to guard against the Tianniu popper, but they neglect to control the lepidoptera moth. There are mainly the following:
1. Coffee leopard beetle moth
The coffee leopard beetle moth is widely distributed, with a more heterogeneous diet, dark red larvae, and spots on the wings of adult moths. April to June is the first high incidence period, and August to October is the second high incidence period.
Figure 12 Coffee leopard beetle moth morphology
The larvae will burp in from the top of the branches or axillary buds, and as the larvae grow, they will gradually drill down into the larger branches until the whole tree dies.
2, a little bat moth
A little manta moth hazard is characterized by the larvae eating the bark of the tree near 2-4 cm near the ground, like a ring peeling, merging into the moth to the xylem, the moth is straight and short, often causing the fruit tree to yellow and fall leaves or even die.
Figure 14 A little manta moth adult
Figure 15 A little manta moth larval harm Source: Citrus pest primary color atlas
Prevention and control methods:
Moths are difficult to control, because the medicine can not be hit, some people use hook hooks, but when encountering worms bending, it is not easy to make. And if a worm is found, it often means that there are many in the trunk, and it is not easy to eradicate.
Figure 16 The larvae of the celestial cow are very harmful Source: Teacher Onayo
<h1>1. Trap and kill adult insects</h1>
Trap adult insects, especially lepidopters, are used to trap adult insects, especially lepidoptera. Adult Tianniu can be artificially caught on rainy days or in the early morning of the evening.
<h1>2. Paint the trunk white and apply medicine</h1>
Because tianniu, popcorns, etc. like to lay eggs at the base of the trunk, so clean the trunk to scrape off the skin, white, and regularly spray organophosphorus pesticides on the trunk and around the trunk, check whether there is insect feces, moth holes, timely prevention has a good preventive effect.
<h1>3. Pharmaceutical prevention and treatment</h1>
Frequent inspection of the orchard, if the worm hole is found, you can clean the feces in the hole in time, stuff it into the cotton ball dipped in dichlorvos or Lego emulsion, or inject it, and then close the worm hole and smoke the larvae.
Figure 19 Hook to kill larvae Source: Fruit farmers create ecological Pujiang
It is also possible to add insecticides such as cypermethrin, dimethoates, and chlorpyrifos to kill adult insects such as tianniu, coffee leopard beetle moth, and popworm when spraying during the high incidence period.
Figure 20 Medicine kills larvae Source: Fruit farmers create ecological Pujiang
<h1>4. The last resort</h1>
If the tree is weak and there is no hope of rescue, then cut it down fiercely, remember to clean up the larvae inside, and take the branches out of the orchard to burn.
Click on the link below to buy genuine agricultural materials》