At this stage, it is precisely during the winter period in the city of chauzhou, during which the mashed potato is growing, which is a critical period for production generation, affected by repeated changes in temperature and heat during the pre-city period and by inadequate care and care。
I. Field of the packages of the package
According to a recent field survey conducted by the county-level plant protection services in the priority growing areas, the main pests currently occurring in potatoes are potato night disease and aphids. The incidence of the sodium dysentery is as high as 4 per cent, generally at 0. 7-1. 6 per cent, and the density of aphids is high at 14 per head, usually 0-3 per head。
Since the beginning of the spring, the weather sector has predicted that the climate will remain warm and humid in general during the spring season of our city, and that, with the heavy growth of the medium- and late-stage plants, the various common conditions of the potatoes (such as the potato fever, black hysteria, etc.) will be easily allowed to enter a period of rapid expansion under suitable mild and humid conditions, with the peak of the epidemic between mid-february and late march, which is expected to occur at a moderate rate, with a significant loss of production of about 20 per cent if care is not taken to combat it。
Ii. Observations
(i) enhanced monitoring and timely direction of response. The agro-technologies departments at all levels are required to strengthen monitoring in the fields and issue timely insect intelligence to guide farmers in their prevention and treatment efforts。
(ii) strengthening management of fertilizers. Increased application of fertilized farm and phosphate fattening, less application of nitrogen fertilizer, timely draining of ditches and lower humidity of the small field climate。
(iii) optimizing the use of high-efficiency, low-intensity oral preparations for treatment。
Potato night disease: the prevention of night disease can, in due course, be based on the use of protective fungicides, such as desen manganese zinc and fluoride, for all-field spraying. In the case of fields that have had a terminal disease, the optimal application time is determined on the basis of field monitoring and weather conditions. Inhalants and protective agents are selected to be used at the same time. The anti-drugs can be used with a combination of acetyl acetyl, acetyl manganese zinc, acetyl acetyl ester, oxone frostal, acetyl acetyl ester, flugisil froste。
Aphids: optimates such as fluoride, amphibian, amphibian and thorium are optional. In the event of a viral disease, the strain should be removed in time for spray control using anti-viral agents such as copper acetate, carbamate and ninnacin to be used in the early stages of the disease。
Potato black scabies: in recent years, black scabies have been sporadic in the middle and later stages of my city's potatoes. When the disease occurs, it is necessary to remove the plant from the field in time for the plant to be removed from the field and to prevent the plant and its surroundings。
When using chemical agents in the mid- and late-stage control of potatoes, attention must be paid to the safety interval for pesticides and to avoid problems with excess labelling of pesticide residues。
