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The purpose of the Rice Wheat Baba team is to use the most simple language to help farmers share experience, high yield technology, and solve substantive problems.
Rice borer, triple borer, and large borer are referred to as rice borers, which are all infested by larvae drilling moths on rice stems.
Among them, the large borer is a pest of the lepidoptera noctuidae, and the trimorphic borer and dichloride borer are pests of the Lepidoptera borer family.
Affected by temperature, altitude, rice planting system and the respective habits of borers, the algebraic occurrence of borers, dihua borers and large borers in various parts of China are different.
The number of algebras occurring from south to north decreased sequentially, of which rice dihua borer rice occurred in China for 1-5 generations a year, which is one of the common pests of rice, occurring from south to north, mainly in the Huai River and its Yangtze River basin south of its area and its area.
Sanhua borer occurs in China for 2-7 generations a year, of which the main occurrence area is mainly the Yangtze River and its southern rice area, north to about 38 ° north latitude.
The occurrence area of rice borer is roughly south of the 34° north latitude line, and the north basically does not occur, with 3-6 generations a year, and the main occurrence area is mainly south of the Huai River.
Rice borers are affected by their habits, and the adult three borers are more active in the upper middle of the night, less active after midnight, and the second half of the borer and the big borer are active in the second half of the night;
Adult insect phototropism, with the strongest tricolor borer, followed by the dictate borer, the weakest borer, so you can use black light to trap adult insects at night to reduce the field spawning as a pest.
Borer eggs are all bulk, and all like to be laid in tender green rice fields, of which the three borer eggs have villi on the surface, like half a grain of moldy soybeans, generally more on the leaf tips of the upper leaves, the surface of the two borer eggs is translucent, looking like fish scales, also known as fish scale eggs, generally more prolific on the lower leaves and leaf sheaths. The large borer is banded, generally 2-4 rows, white, and generally prolific on the upper leaf sheath and ear buds.
Rice borers are infested by drilling borer stalks, and the period of infestation is different, and the typical symptoms in the field are dry heart seedlings (pest at the seedling stage), wilted pregnant ears (pests at the pregnant panicle stage), withered white ears (pests from ear extraction to filling stage), and insect injury plants (after the milk maturity stage).
In the field, when the second borer, the three borer and the big borer are mixed, in addition to distinguishing according to the characteristics of the larvae, it can generally be distinguished according to the size of the borer hole.
For example, the stem borer hole is large, or the stem borer is partially decayed, or the sparse slurry insect dung is infested by the large borer, the stem moth hole is small, or the moth part is hard and not soft, or the worm manure is dried for the three borers as a pest, and the general borer borer holes that are harmful to the two borers are larger and smaller than the three borers, or the part of the moth that enters the stem is significantly softer, but it does not rot, or the worm manure at the borer hole is wet and dry, but it is not thin.
<h1>In short, the occurrence of the second borer, the three borer or the large borer is different in different places, and the characteristics and differences caused by the occurrence in the field can be quickly distinguished with the accumulation of experience. </h1>
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