Common diseases and insect pests of litchi and their control

Litchi is one of the fruits that many people like to eat. It has the nickname of "Feizixiao". It is distributed in southern China and is one of the unique fruits in the south. Litchi is famous for its plump flesh and abundant water, but do you know how many diseases and pests litchi will suffer during its growth? Today's small series introduces several common diseases about litchi.

1. Bugs

The bugs generally nibble on the tips, spikes and fruits of litchi during the young fruit stage, causing the fruit to drop. In winter cold conditions, stink bugs go into suspended animation, and we can shake branches and drop them to the ground to kill them. You can also use pesticides to kill. Generally, the active period of stink bugs is March, April and May. In these three months, pesticides such as methamidophos are sprayed once a month to kill insects. The egg mass of stink bugs is also obvious. The egg mass can be concentrated.

2. Pedicle worm

As the name suggests, the pedicel borer will nibble at the fruit pedicle during the young fruit period of litchi, enter the fruit from the fruit pedicle, nibble the fruit core and cause the fruit to fall, the transmission tissue is gnawed empty, and the leaves are withered. In winter, orchards should be cleaned well, and the fallen dead branches should be collected and burned. One month before the flowering ears and fruits ripen, spraying prevention can be carried out by spraying 750 times dichlorvos or 1000 times Xingbao cotton. However, it should be noted that larvae live in the veins and adults in the crown.

3, inch

There are many kinds of geometrids, but they also eat leaves and young fruits. The most serious is in spring lychee flowering, lychee has not yet bloomed before or after flowering, spraying chemicals to eliminate. Dichlorvos 800 times or trichlorfon 900 times can be sprayed. However, it is necessary to note that the harm of inchworm to people is also very large, pay attention not to let inchworm touch the skin on the body, touch the skin will appear red and swollen state, pain and itch!

4. Leaf roller moth

The leaf curl moth, like the geometrid, comes in many varieties. Larvae eat leaves, fruit shoots and eat fruit, is the most active of several pests. Control methods are also similar to the previous several, winter garden cleaning work, concentrated burning dead branches, before flowering, after spraying dichlorvos.

5. Scarab

There are two common scarabs, the flower beetle and the green beetle. Adult chafers eat leaves and fruits, etc., while larvae generally live underground and nibble on roots, making fruit trees unable to absorb nutrients and deteriorating tree vigor. In the morning and evening, chafers will concentrate on flying. At this time, they can be caught manually or shaken when they die, and they can be concentrated on falling to the ground. They can also be sprayed with pesticides. They can also be sprayed with phoxim before the larvae emerge in the soil.

6, felt disease

The main harm of felt disease is young leaves, serious harm to flowers or branches. The main pest is rust ticks, which, when present, appear to rust on the front leaves. In the spring when the most serious, the victim leaves toothpick shape prominent, the victim parts expand thickening, the back will have white hair. In general, this situation requires cutting off the injured branches, removing the fallen branches, and concentrating on burning. In spring germination, can spray dichlorvos and other agents for prevention.

The above six kinds of diseases and insect pests are common diseases and insect pests of litchi. In fact, the places where the diseases and insect pests nibble are almost the same, nothing more than fruits and leaves, etc. Most of the active periods are also in spring. You only need to spray pesticides frequently in spring to prevent them, and the pesticides that spray and kill these diseases and insect pests are almost the same. Once one of the diseases and insect pests is found, you must take timely measures, otherwise it may damage your economic interests!