Paclobutrazol, which can be used to promote the growth of lateral buds (tillers) after spraying with water, can effectively prevent rice from lodging. However, when paclobutrazol is used, it is often caused by improper use, which causes the seedlings to be too dwarf, stagnant or even dead. Before using paclobutrazol, first understand the characteristics and methods of use of the pesticide , scientific use of drugs, the Chinese pesticide network Xiaobian specifically for you to explain the correct method of using paclobutrazol in rice fields:
The first point is that the dose of paclobutrazol must be appropriate.
The spraying concentration of paclobutrazol is different in different varieties and seasons. When used, the dosage should not be too large or too small. If the dose is too large, the seedlings are too controlled and dwarfed; if they are too small, the effect of the strong tendon is not obvious. Practice has shown that the usual doses of seedlings (both 15% wettable powders): 120 grams per 667 square meters (1 mu) in early rice field, 60 kg in water; 200 g per 667 square meters in late rice field, 100 water Kg; 150 mg of 667 square meters of early-maturing varieties of mid-season rice, 75 kg of water, 180 g of late-maturing variety, 90 kg of water. Use it as a uniform spray. If the concentration is too long, the stagnation may be applied, and the "920" concentration of 10-4 may be sprayed to promote the growth of the seedlings into normal growth.
The second point is to pay attention to paclobutrazol pesticide residues.
Since paclobutrazol moves slowly and is not easy to decompose in the soil, if paclobutrazol is used several times a year or on the same plot, or if the poultry crops are planted without ploughing, the paclobutrazol residue may be excessive. The crops are controlled again, affecting the normal growth of the crops. In this regard, it is necessary to pay attention to the use of dosage and do a good choice in the field, try to avoid the use of paclobutrazol in the same piece of the year or multiple times.
The third point is that paclobutrazol should be used in a timely manner.
The seasons for the use of paclobutraz are different in the breeding season. During the early rice growing period, due to the low temperature, the seedlings grow slowly. The purpose of using paclobutrazol is to strengthen the seedlings and enhance the resistance. The application period is generally three-leaf period. The use of paclobutrazol in late rice is both controlled and promoted. The period of use should be in the period of one leaf and one heart, and no later than the second leaf. The medium-sized rice is closely controlled by the climate and the climate. The early-maturing varieties are applied in the 2-3 leaf stage, and the late-maturing varieties are applied in the one-leaf and one-heart stage.
Tips for pesticide network : Due to different rice varieties, one endogenous gibberellin, the level of indole acetic acid will be different, the growth potential is also different, the varieties with stronger growth need to use more drugs, and the less developed varieties are less. use. In addition, when the temperature is high, the application is more frequent, and when the temperature is low, the application is less.
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