The Latest Control Methods for Common Pests and Diseases of Lychee

Lychee is one of the fruits many people love to eat, and it is nicknamed “Feizixiao” (Concubine's Smile). It is distributed in southern China and is one of the fruits unique to the south. Lychee is famous for its plump flesh and abundant juice, but do you know how many pests and diseases lychee can suffer during its growth? Today the editor will introduce several common diseases of lychee.

1. Stink bug

Stink bugs generally feed on the shoot tips, flower clusters and fruits of lychee during the young fruit stage, causing the fruits to drop. In winter, under low temperatures, stink bugs enter a state of feigned death; we can shake the branches and destroy them after they fall to the ground. Chemical sprays can also be used to kill them. The stink bug's active period is generally March, April and May; spray once each month during these three months with pesticides such as methamidophos to control the insects. The egg masses of stink bugs are also very obvious, and the egg masses can be collected and dealt with together.

2. Lychee stem-end borer

The lychee stem-end borer, as its name suggests, feeds on the fruit stalk during the young fruit stage of lychee, entering the fruit from the stalk, feeding on the pit and causing the fruit to drop; the transport tissue is eaten hollow, and the leaves turn yellow and wither. In winter, the orchard should be cleaned thoroughly, and the fallen dead branches should be gathered and burned. About one month before the flower cluster stage and before the fruit ripens, spray pesticides for prevention; you can spray 750 times diluted dichlorvos or 1000 times diluted Xingbaomian to kill them. However, note that the larvae live inside the leaf veins, while the adults live within the tree canopy.

3. Inchworm

There are many species of inchworm, and they also feed on leaves and young fruits. The most serious damage occurs in spring when lychee is flowering; spray pesticides to kill them before lychee blooms or after the flowers fade. You can spray 800 times diluted dichlorvos or 900 times diluted trichlorfon. However, note that inchworms are also very harmful to people; be careful not to let inchworms touch the skin, as contact with the skin will cause redness and swelling, with both pain and itching!

4. Leaf roller

Like the inchworm, there are also many species of leaf roller. The larvae feed on leaves and shoot tips and bore into the fruit; they are the most frequently active among these several pests. The control methods are similar to the previous ones: clean the orchard in winter, gather and burn dead branches, and spray dichlorvos before flowering and after the flowers fade.

5. Scarab beetle

There are two relatively common scarab beetles: the flower-feeding scarab and the copper-green scarab. Adult scarabs eat leaves and fruits, while the larvae generally live underground feeding on the roots, so that the fruit trees cannot absorb nutrients and the tree vigor deteriorates. In the morning and evening, scarabs fly in groups; at this time, manual capture can be used, or when they are in a state of feigned death, shake the branches, and after they fall to the ground, gather and destroy them. Pesticides can also be sprayed, or before the larvae emerge from the soil, spray phoxim poison to kill them.

6. Felt disease

The main damage of felt disease is to young leaves, and in severe cases it harms flower clusters or branches. The main pest is the rust mite; when this pest appears, the upper surface of the leaves looks as if it has rusted. It is most serious in spring; the damaged leaves have toothpick-like protrusions, the damaged parts expand and thicken, and there is white fuzz on the underside. Generally, when this situation occurs, the damaged branches should be cut off, the fallen branches cleared away, and gathered and burned. When buds sprout in spring, pesticides such as dichlorvos can be sprayed for prevention.

The above six pests and diseases are the common pests and diseases of lychee. In fact, the places where pests and diseases feed are mostly similar, nothing more than the fruits and leaves, and their active periods are mostly in spring. You only need to spray pesticides frequently for prevention at the beginning of spring, and the pesticides for killing these pests and diseases are mostly similar. Once one of these pests or diseases is found, you must take timely countermeasures, otherwise it may damage your economic interests!