Rice thrips, a very common pest, occur in the basic rice planting area, it has a variety of classifications, but in the actual agricultural planting process, we will not distinguish specifically, to thrips as a collective name.
Thrips in rice fields, in addition to harming rice, will also be harmful to weeds in the field, in the early stage of rice growth, it is mainly based on the sap of rice plants (leaves, flowers and other tender parts), with the growth of rice, in the later stage, the rice parts began to harden, affecting its sucking, thrips began to harm the weeds on the edge of the field (also relatively young weeds), in the winter, the thrips will overwinter in the weeds on the edge of the field, wait until the next year's temperature is right, continue to harm the rice, so that the cycle begins.
Thrips for rice harm is very large, because of its small size, not easy to find, so leading to people ignore the prevention of it, wait until the discovery, basically has been in a serious situation, for example, in the rice seedling stage, the harm of thrips will lead to the field rice leaf tip bending, many friends will feel that it is caused by insufficient nutrition or disease, and then start to topdress, play fungicide, but the effect is not ideal, wait until the reaction, only to find that it is the harm of thrips, at this time in the drug control, rice plants have been damaged, The yield will be more or less reduced, speaking of which, the little helper will tell you about the 3 symptoms of thrips harming rice:
1, from the color of the affected leaves, there will be small yellow and white spots, in addition to some small holes, which is caused by thrips sucking, it is very good to judge, found that there are damaged rice plants, pick a leaf can be.
2, observe the leaf tip, if it is a thrips hazard, the rice plant leaf tip will have a curly, yellowing phenomenon, if serious, the whole plant will appear yellowing phenomenon (there is a friend reaction, there is a redness situation, we can pay attention to it, if you find that the rice leaves in the field have redness, observe whether there is a thrips).
3. If the thrips are harmful during the flowering period of the rice panicle, observe the shell, one is that the white filament is extracted, and the other is that the thrips can destroy the flower vessel of the rice, and eventually form a deflated grain or empty shell.
Although the harm of thrips is great, in actual agricultural production, it is also very good to prevent and control, the specific methods are as follows, let's look at it together:
1. Remove weeds
As mentioned above, thrips will overwinter on weeds, so clearing weeds in the field is still very effective for the prevention of thrips, such as when planting rice, first remove the weeds in the field or the ground, if you are afraid of trouble, you can spray, but also play a certain effect (specific agents can be seen below).
2. Water and fertilizer management
From the beginning of the rice seedling stage, water and fertilizer management should keep up, the purpose is to ensure the normal growth of rice, do not let it form weak seedlings, enhance their own resistance, in order to reduce the harm of thrips, in addition, even if not to prevent thrips, water and fertilizer management should also keep up, promote the final high yield.
3. Booby traps
Blue sticky plates can be placed in the field, the purpose is to use the habits of thrips to trap adult insects, in order to achieve the role of prevention and control, reduce the number of thrips in the field.
4. Pharmaceutical prevention and control
There are many drugs on the market to prevent and control thrips, such as common imidacloprid, acetamiprid, etc., the price is not expensive, an acre of land is a few dollars small, however, with the use of consecutive years, there are friends to react, these common agents on the thrips control effect is getting worse and worse (due to the increase in resistance), so, for areas with high resistance, you can choose aldylfen, thiamethoxam and other agents, although in the cost is somewhat expensive, but the effect of preventing and controlling thrips, or can be. If the effect of one-time prevention and control is not satisfactory or the subsequent thrips hazard occur, multiple prevention and control can be carried out, according to the situation of thrips in the field.
In addition, the above 4 points are more common and effective prevention / control measures, however, the small helper found that everyone is not interested in preventive measures, most of them are after the emergence of thrips, spray prevention and treatment, and for this situation, and then simply remind 3 points of precautions:
1, spraying as far as possible in the down, because under normal circumstances, thrips are day and night out, so the afternoon medication, the effect will be relatively better.
2, because the thrips are relatively hidden, so, when spraying, must be penetrated, the front, back and curly parts of the leaf, as far as possible to spray.
3. It is recommended to prevent in advance, even if agricultural prevention is not carried out, it is necessary to spray medicine for prevention to avoid the situation of bad prevention and control in the later stage.
About the symptoms of rice thrips and prevention methods (precautions), the little helper said so much, do not underestimate the small size of the thrips, and more common, but its harm is large, so, learn to prevent and control methods is very important, I hope this content can bring you some help, if the field found that there are thrips, timely treatment.
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