20% pyrethroid EC 3000-4000 times, 2.5% deltamethrin 4000-5000 times, 90% trichlorfon crystal 1000- 1500 times or 50% acetaminophen EC 800 times can kill larvae.
At the same time, it is necessary to strengthen the tree vigor, increase the supply of fertilizer and water, increase the cultivation intensity, make the loquat tree grow sturdily and enhance its resistance to germs and viruses. When sowing, the seeds are treated with 500 times of carbendazim solution and sprayed on the seedbed, and the carbendazim solution can be sprayed several times after watering; Pay attention to watering at the beginning of seedling stage. Lack of water will cause the leaves to dry and yellow. ?
Extended data:
Loquat fruits ripen in May-June every year, and the ripe fruits are picked in batches, and the seeds are taken out and sown in loose soil in the field or in sowing pots. When sowing in a pot, the seeds can be treated with 500 times carbendazim solution, sprayed on the seedbed according to the demand method, with the spacing between plants being 3-5 cm, shaded or placed in scattered light, and watered 1-2 times a day to keep the soil moist.
Generally, the width of the border planted in the field is 1- 1.5m, and the border surface is made into a turtle back shape, which is convenient for drainage. Every 20-30 cm/seed furrow is opened on the border, and the furrow is 2 cm deep, and every 3-5 cm/seed is sown in the furrow.
Do not cover the soil after sowing, cover the grass and water it after sowing, and water it 1-2 times a day to keep the soil moist. Pay attention to moisturizing, reduce direct sunlight and improve the emergence rate.