In recent years, rice black-streaked dwarf disease has been the most worrying disease in the process of farmers planting rice. It is understood that the disease has a wide range of occurrence, strong violent, and serious losses, and can occur in all growth stages of rice. The main symptoms are plant dwarfing, and serious crops may even be rejected.
Nowadays, since the promotion and application of the high-tech plant production regulator in Germany, “Bi-protection†has played an important and important role in the prevention and control of rice black-streaked dwarf disease, which has been widely recognized by farmers and has been repeatedly The government department recommended the first choice for agricultural products.
According to relevant experts, the traditional comprehensive prevention and control measures for the disease include: selecting suitable varieties for disease resistance according to local conditions, and eliminating the severely ill varieties in the previous year; timely removing the weeds in the fields and surrounding areas, especially in the single-season rice planting areas, and fighting drugs before and after planting to control the fields around Putian. Planthoppers or weeds on the weeds; early detection of diseased plants (clusters) in time to be removed, buried deep in the field, and from the healthy rice bushes to fill the seedlings, appropriate application of quick-acting fertilizer, to promote the recovery of rice seedlings; Long-acting agents such as buprofezin and pymetrozine are used interchangeably with quick-acting agents such as imidacloprid and nitenpyram.
According to Xia Aiping, product manager of Beijing Chenghe Jiaxin Agricultural Materials Trading Co., Ltd., in 2009, black strip dwarf disease occurred in a large area in the southern rice producing area, in order to verify the effect of “Bibao†on rice resistance and yield increase. Beijing Chenghe Jiaxin Agricultural Materials Trading Co., Ltd. conducted a field trial on the rice of Zhoushuisheng, a farmer in Shigang Town, Nanchang City, Jiangxi Province, and immediately after the occurrence of the dwarf disease (August 30, 2009) Protecting 2 grams of water with 15 kilograms for foliar application significantly promoted the development of rice roots, virus disease was controlled, and growth was restored.
At 1 pm on September 1st of that year, it was first observed that the dwarf plant using "Bai" grew more than 20 new roots from the root, 0.5-1.0cm long; the control plants only had 3-5 new roots 0.3- 0.5cm, the rest of the roots have died. On the 10th of September at 5 o'clock in the afternoon, the rice leaves were green, the leaves were uniform, the new leaves were flat and straight; the unused edges were yellow, the base and the leaves were wilting, and the new leaves were short. . The rice plants using “Bai Hu†are neatly plucked and the seeds are full; the unused rice plants are short, the disease is stored in the leaf sheath, the neck stalk is shortened, the seed setting rate is low, and some of the diseased plants die and die. In 2010, “Bi-protection†was also promoted in the area where black-streaked dwarf disease occurred in the main rice producing areas. Before the onset of the disease, the “Bi-protection†production area was used twice, and the incidence of black-streaked dwarf disease was significantly reduced. Production increased.
According to relevant tests, the seed setting rate of rice treated by “Bai Hu†was 94%, which was significantly higher than that of the control (88.9%). Through the promotion and application of rice for more than 3 years, the use of “Bi-protection†can promote the yield increase of 30-50 kg in early rice, and the yield of medium-sized rice can increase 100-150 kg per mu.
It is also known that the phytotoxicity caused by improper use of herbicides and pesticides has always been a problem that plagues farmers' friends. At present, there is no good solution in production. A large number of tests have proved that once crops are phytotoxic, they are used at intervals of 7 days. “Bai Hu†can be relieved and restored 2 times (5000 times).
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