What kind of medicine are used for underground pests of watermelon?

Watermelon is a common fruit, in the hot summer, eat one or two pieces, can cool down the summer heat. If it is cultivated in all parts of our country, what kind of medicine are used for underground watermelon pests?

1. Melon seed fly

Melon seed flies often cluster to harm the young stems below the topsoil of melon seedlings, so that the germinated seeds can not be unearthed normally, or drill in from the roots of the seedlings, causing harm along the young stems, so that the Hypocotyl is hollow and rotten, and the aboveground parts wither and die, resulting in a serious lack of seedlings. Control method: during direct seeding in the field, the seeds can be mixed with 40% diazinon powder, the dosage is 0.3%-0.5% of the seed amount, or soak the seeds with 40% dimethoate EC 1000 times. When sowing or planting, use 1000 times of 90% trichlorfon crystal or 1000 times of 50% dichlorvos, 50% phoxim EC or 50 grams of diazinon per mu to apply or spray the seedbed. After planting, 2000 times of 50% marathon EC was used as root water to prevent melon seed flies.

2. Grub

The grub larva harms the germinating seeds and bites off the roots and stems of the seedlings, resulting in missing seedlings and broken ridges, and the broken rhizomes are cut neatly. Adults like to eat leaves, tender leaves and buds. Control methods: spray with 1000 times of 40% dimethoate EC, 25% synergistic quinathion EC, 1000 times of trichlorfon soluble powder, 1000 times of 30% trichlorfon EC or 1500 times of phoxim EC to control adults or kill larvae.

3. Mole cricket

Mole cricket adults and nymphs bite the newly germinated seeds and buds, also eat young roots and tender stems, or bite off the roots and stems of the seedlings, resulting in stunted growth and even withering of the seedlings. (1) seed treatment. Using medicament to mix seeds, the amount of dressing should be accurate, the seeds should be evenly mixed, and the seeds should be fully dried after dressing, and then sprouting and sowing. (2) apply poison bait when sowing. Poison bait can use fried beans, wheat bran, corncob and bean cakes as bait. Add 10 grams of metrodronate or 40% of Lesben EC for every 1 kg of bait, add the right amount of water and wet it. In general, the control effect is good if it is sprinkled into the melon field or seedling bed before sowing or planting. When the damage is serious, the hole can be filled with 800 times of 30% dichlorvos EC.

Underground pests of watermelon can harm the growth of watermelon, mainly for prevention. If they are accidentally damaged in the process of growth, timely control measures should be taken.