The harm of mulberry longicorn beetles to figs and how to control them

Figs are not only easy to reproduce and cultivate, but also treasures of fruit and medicine. Fig peel is thin and seedless, sweet and soft as honey, rich flavor, unique flavor and rich nutrition. Contains a lot of vitamin A, C, and contains a variety of organic acids and more than 17 kinds of amino acids. The content of vitamin C is 2 to 3 times that of citrus, 8 times that of peach and 2 to 7 times that of pear.

Harm of mulberry longicorn beetles to figs

Mulberry longicorn beetles are widely distributed and are the main pests of fig trees. The adults gnawed on the bark of the twigs, and the scars were irregular strips. When the bark of the branches was gnawed off, the resulting branches were easy to break and die. Adults lay eggs in the middle of the grooves on the branches. After the eggs are hatched, the larvae eat down along the xylem and pith in the branches, which can eat to the roots, resulting in poor plant growth, premature senescence, affecting the fruit yield of the same year, and the cold tolerance of the tree is reduced, which is prone to freezing injury, and the whole plant dies in serious cases. The overwintering larvae of mulberry longicorn beetles overwintered in the branch decay channel. The overwintering larvae began to sting in the first and middle of March and entered the peak period of damage from April to May. The mature larvae moved up the insect path in late May to pupate in the pupa chamber. after Eclosion in mid-late June, the adults ate the new shoot skin of figs and laid eggs on the branches. The newly hatched larvae feed directly into the xylem and develop at the base of the tree trunk. the decay path of the larvae is 1.5 to 2.5 meters long. The larvae stopped feeding in the middle and last ten days of November and entered the overwintering state.

Comprehensive control methods of mulberry longicorn beetles

1. Cultivation and control. According to the characteristics that mulberry longicorn beetles like to eat mulberry and oak trees, mulberry or oak trees are used as trapping species. That is, mulberry or oak trees are planted 100 meters away from the fig orchard as an isolated protective belt. During the occurrence of mulberry longicorn beetles, spray control of mulberry trees should be carried out, and attention should be paid to the timely and thorough control of induced trees. To reduce the insect source, the harm to the fig tree.

2. Artificial prevention and cure. White coating on tree trunks and branches (i.e. 10 parts of quicklime, 1 part of sulfur and 40 parts of water) before the occurrence of adults to prevent adult oviposition. In the period of adult occurrence of mulberry longicorn beetles, adults are caught sooner or later. The eggs were removed manually from July to August, and the oviposition grooves were checked every 7 to 10 days. The eggs were punctured or the newly hatched larvae were killed with a knife at the grooves. The damage of larval dry decay could be controlled by digging eggs for 2 or 3 times.

3. Chemical control. During the larval occurrence period, when the moist fresh defecation hole was found in the lake, the insect feces were removed with iron wire, then the aluminum phosphide tablet was stuffed into the defecation hole, and the wormhole was sealed with slime for fumigation. Or use an animal syringe to inject 40% omethoate EC 40-50 times into the defecation hole, and then plug the wormhole with mud to prevent the outflow of the liquid.

What are the pests of figs?

1. Monochamus alternatus

The adult begins in the first and middle of June, and the peak period is in the middle and late June. The adult spawning period is from mid-June to early August, and the eggs are often laid on the treetops or biennial branches about the distance from 30cm. When laying eggs, the adult bites "u" or "T" grooves in the bark and xylem and lays 1 egg. The harm of small larvae is very easy to find, where there are reddish-brown feces, there must be larvae. The larva eats the food cortex from top to bottom, overwinters in the phloem, and eats the protoplasm in the following spring. In the third year, the mature larvae pupate from May to June and the adults from June to July.

Prevention and control methods: the adults are artificially killed during the spawning period from June to July every year; for fig trees with insect pests in the previous year, 80% dichlorvos EC or 40% fenitrothion 50 times the solution of 80% dichlorvos EC or 40% fenitrothion was applied to the last larva excretion hole of branches and cadres in April-May and September-October, and the wormhole was injected with a liquid injector. Or dip the cotton into the wormhole with medicine, the effect of killing larvae is good. It is also possible to spray wine branches and spawning places with 40% omethoate 100 times or 10% insecticide 100 times before the newly hatched larvae decay into the xylem.

2. Spodoptera litura

The adults appeared in the middle of June, laid eggs on the back of the leaves, and the egg period was 7-10 days. The larvae were damaged from mid-July to late August and ate only leaf flesh. The residual veins of the leaves will be eaten into a network; when the larvae grow up, they will eat the leaves into notches, leaving only the petiole and the main vein.

Control methods: spraying 1500-2000 times of trichlorfon, or 800-1000 times of dichlorvos, or 800 times of cyanobacteria in larval stage, the control effect is better; the poison ring is tied to the trunk branch to kill the mature larvae crawling along the trunk; its phototaxis can be used to trap and kill, and the pest situation can be predicted accordingly.

III. Black velvet golden turtles

Larvae feed on fig roots, adults mainly feed on fig twigs and new leaves, and like to overeat. The larvae feed on the young roots, and in autumn, the 3rd instar mature larvae drill into a soil chamber 20-30 cm deep to pupate, and the pupal period is about 10 days. The emergence of adults is not unearthed and enters the overwintering state.

Control methods: during the peak period of adults, poplar (or willow) branches and leaves were stained with 80% trichlorfon 200 times solution at about 5 o'clock when there was no wind, and a bunch of poplar (or willow) branches were inserted into the nursery or newly planted young trees every 10-15 meters to trap and kill adults. 50% monocrotophos 50 times solution can also be used to soak poplar (willow)-tree branches for more than 10 hours, 5 sticks per mu in the ground, trapping and killing adults; soil treatment.

Ecological habits of figs

Like warm and humid marine climate, like light, like fertilizer, not cold-resistant, not resistant to waterlogging, but more resistant to drought. In the inland area of North China, freezing injury is easy to occur if the new shoots are exposed to-12 ℃, and the aboveground part may die at-20 ℃, so it is very important to prevent cold in winter. Figs are resistant to barren and have strong soil adaptability, especially strong salt tolerance, but fertile sandy loam is the most suitable for cultivation.

With broad leaves, peculiar fruits and numerous fruits in summer and autumn, it is an excellent courtyard greening and economic tree species, with the characteristics of resistance to a variety of toxic gases, resistance to smoke and dust, less diseases and insect pests, and can be used in factory and mine greening and family sideline production. Leaves, fruits and roots can be used as medicine. Only the ability of cold resistance is low, planting should choose the warm place of sunny leeward. Breeding and cultivation: mainly by cutting breeding, but also can be sown or striped breeding. The first year cuttage, the second year can hang fruit, 6-7 years reached the full fruit period. If planted on the side of the garden road, lawn, pool and buildings, it can add scenery.

Fig tree has luxuriant branches and elegant tree form, and has good ornamental value. It is a good ornamental tree species for garden and courtyard greening. Figs can be planted in pots in addition to field planting and courtyard planting.

We can see the fig from this name, it is a kind of special plant, it can bear fruit without blooming. Understanding its insect pests and prevention methods is very important for planting figs, which can increase its yield and improve the efficiency of planting.