Rice leafminer fly, belongs to the diptera pest, in the rice growth process, more common, do not look at its small size, but the harm is very large, not only in the rice field, wheat field, vegetables also occur, in addition, some grass weeds, will also be affected by the harm of leafminer flies, such as barnyard grass, qianjin, wheat lady, early maturing grass, etc., that is to say, not only harm crops, but also harm weeds (wheat and rice also belong to the grass plants).
From the appearance, it is difficult to find without careful discrimination, because of its small size, the larvae are small white maggots. The harm of rice leafminer fly is mainly to eat leaf flesh (can also harm the petiole), after finding adult insects, look silent, in fact, eat leaf flesh, such as this leaf eat almost, go to another rice plant, continue to harm, leaving the leaf epidermis, in this case, the growth tissue of the leaf is destroyed, there will be symptoms of decay, from the outside, the leaves will appear a lot of irregular white spots, a bit like the previous use of paraquat, the liquid accidentally drifted to the leaves, burning the kind of symptoms, if it is more serious, Rice plants withered yellow, or even withered, the impact is still quite large.
Rice leafminer fly propagation and transmission path to tell you about it, it has a strong viability, such as ditch edges, weeds these places, you can let them survive the winter, wait until the temperature rises in the second year, carry out a large number of reproduction, wait until the adult insects, begin to harm rice and other plants, here also pay attention to a point, when the rice field irrigation is too deep or for other reasons caused by the seedlings are weak seedlings, the harm suffered by rice will be aggravated, if there is such a situation in the field, pay more attention.
The above is mainly said to be some of the basic situation of rice leafminer fly, we only understand their living habits, hazards, transmission and other content, in the prevention and control, in order to have a targeted, the following to say these 4 measures, first start with prevention, if found, and then timely drug prevention and control, together to see:
1, destroy their living environment, before the spring sowing, the weeds on the ground or surplus remaining rice plants to be cleared out, if next to the ditch side of the plot, the prominent weeds should also be treated, the purpose is to prevent from the source, disrupt their living and breeding space, although can not be completely prevented, but can be well mitigated, if the trouble, you can play medicine prevention (specific medicine reference article 4).
2, the choice of strong insect resistance varieties, as well as in the breeding of seedlings, but also pay attention to management, the case of strong seedlings, their own resistance to insect pests will be enhanced, some weak seedlings weak seedlings, it is recommended not to transplant, if in the seedling breeding, there are leafminer flies appear, spray control, available agents, the following point 4 will be mentioned.
3, water management should be moderate, not too deep, irrigation shallow irrigation on the line, if the irrigation is too deep, rice leaf diving fly harm is serious, you can carry out drainage field treatment, followed by spraying prevention and control (specific agents can also refer to point 4), if there are weak seedling symptoms, topdressing to provide nutrition for it, promote strong seedlings.
4, once the field is found after the rice leafminer fly, it is necessary to use drugs in time to control, there are many optional agents, such as common fly killing amines, avermectin, etc., areas with large resistance, these two drugs are mixed together, the effect is still good, if the pest is serious plots, once not, can be used many times, pay attention to cost control.
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