MAIN PESTS ON WATERMELON 06/07/2022

1. Melon beetle

Melon beetles are mainly harmful in the dry season, active in the early morning or cool afternoon. The beetle damages by scraping the cuticle on the leaf in a circle, the part that is sniped off from the leaf. Melon beetles often cause damage on young plants, if the population is high, the melon beetles can eat all the leaves and young shoots, in addition to harming the leaves, the melon beetles also lay eggs in the soil, near the base, the eggs hatch into larvae. eating roots, boring into the root causes the plant to yellow, wilted, and underdeveloped.

Treatment:

After harvesting, cleaning the field, burning and destroying plant residues, before planting, it is necessary to plow, harrow, dry the soil, kill.baby worms and pupae. Regularly visit the field, when the density of melon beetles is high, can be sprayed with products: Secsaigon 25EC or broadcast granular products like Sago-super 3GR around the base when planting or before flowering to kill baby worms .

2. Leaf boring flies

Flies are active from morning to afternoon. Flies cause damage by using their egg-laying organs to slit the surface of leaves, creating holes and laying eggs. The eggs hatched and the maggots began to bore into zigzag lines, before they were small and then they grew according to the development of the larvae. The boring lines appear on both sides of the leaves, but are most evident on the upper side of the leaves. When mature, the maggot punctures the epidermis, emerges to pupate. Injuries caused by flies cause dry leaves, small fruits, and poor growth.

Treatment:

Sanitize the field after harvest.

- Plow deep to kill pupae, clean the border weed.

- Need to prevent early treatment when the tree starts to produce new leaves, you can manually remove severely damaged leaves, if the flies cause a lot of damage, you can use chemical products Secsaigon 25EC, Roninda 100SL to spray.

3. Red Spider

Red spiders often cause damage in the dry season, when it is hot, small in size, damaging mainly on the underside of leaves by sucking sap from leaves and at the same time injecting toxins, causing leaves to lose their green color and turn green. yellow, slowly withering, falling off.

Treatment:

Because spiders are small and difficult to treat, they need to be detected early. To get rid of red spiders, you can use special products to treat spiders such as SK Enspray 99EC mineral oil. Note that you need to spray a lot of water, spray evenly on both sides of the leaves, especially the underside of the leaves, spray early in the morning or the.cool late afternoon.

4. Thrips (Bu Lạch.Ray Lua):

Thrips are small and can be seen with the naked eye. Thrips mainly live and cause harm by sucking sap in young parts such as leaves, buds, young buds, flowers, young fruits, etc. Making buds, young leaves curly, buds wilted, flowers fall, skin is rough (branny skin). On leaves, the characteristic symptoms caused by thrips are curled leaves, two edges of the leaves are curled, folded below, this symptom is combined with the symptoms of melon aphid causing the young buds to be hard, raising their heads high, so Farmers call it "raising the head of the unicorn". Thrips mainly cause damage in dry, hot, sunny weather.

Treatment:

Thrips are relatively difficult to treat because they are small, live and damage the underside of leaves, on the other hand, thrips develop product resistance relatively quickly. Can be used as Osago 80WG, can be combined with SK Enspray 99EC mineral oil.

5. Aphids (melon aphids, mealybugs, honey hoppers...)

The damage is characterized by a high density of sucking sap on the underside of leaves, especially young buds, flowers, causing leaves, buds, buds and flowers to wilt. If aphids suck at the stage of flowering, young fruit, it will cause flowers and fruits to fall easily, etc. In addition to sucking sap, aphids are also a vector of viral diseases for plants that cause yellow mosaic disease.

Prevention:

- Clean up crop residues after harvest.

- Regularly visit the field to detect and prevent timely because aphids multiply very quickly. If aphids appear in large numbers, they should be promptly sprayed with insecticides such as Secsaigon 25EC, Osago 80WG.