After the previous crop is harvested, timely deep plowing can reduce the insect population and reduce the damage. Taking advantage of the phototaxis of the spotted leafminer, you can use a black light lamp to trap and kill the adults. Use a mixture of engine oil and butter to apply it on a yellow board and insert it into the field to stick to the flying adults. Insert 20-30 yellow boards per acre. Mix the sugar evenly and pour it on a mineral water bottle filled with half a bottle of water. The adult insects will pounce on the water bottle and almost all of them will die. Beware of insects that slip through the net. If you see ghosts and symbols on the leaves, they are larvae. Fifteen days before the product is put on the market, you can spray the spreading agent and the cheapest insecticide mixed with water up and down on the leaves. Later, you can also just use the spreading agent mixed with water and spray it.
The leafminers have already reacted to abamectin. For more serious resistance, the best drug currently is cyromazine. The patented product FEROLITE launched by RUSSELL IPM in the UK has a very good control effect on spotted leafminers. It has been well used in many European and Mediterranean countries and is the first choice for green prevention and control. After being damaged, the leaves gradually wilt, the upper and lower epidermis separate and wither, and finally the whole plant dies. Identification of the American spotted leafminer: the larvae feed on the leaf mesophyses to form tunnels, the tunnels are irregular and snake-like, not exceeding the main veins; black insect droppings are alternately arranged on both sides of the tunnels. Abamectin, also known as acarin, acarin, etc., is a natural product isolated from soil microorganisms. It has contact and stomach poisoning effects, has no systemic properties, but is highly permeable to the leaves and can kill sub-epidermal pests. Does not kill eggs.
You can dilute it with propanophos and pour it into the sand and put it in the loofah field to drive it away. You can also choose 300 times liquid of 18 insecticides, or 1000 times liquid of 20 years and winter, etc. for spraying. When applying pesticides, spray from top to bottom on the melon frame to prevent adult insects from escaping. I picked the grown loofahs and left the smaller ones to wait until the weather clears to apply medicine. It is most suitable to spray pesticides in the bright sun at noon. Generally, when applying "Mexican Silk" and "Yellow Thistle Medicine", add water to the sprayer and spray. You can pick loofahs at least seven days after spraying or after it rains. Otherwise, it is easy to be poisoned if you pick it off and eat it. Cyromazine: A specific insecticide with contact killing, gastric poisoning and strong systemic effects. It is low in toxicity, has good quick-acting effect and has a long duration of effect. It has good control effect on larvae but poor control effect on adult flies.