Pest control measures of alfalfa in autumn and winter

In the autumn and winter, alfalfa insect pests are most easily overlooked. If we can do a good job of pest control during this period, it will be of great significance to kill overwintering pests and diseases and reduce the source of pests in the next growing season. It is an important prevention and treatment measure for alfalfa fields. One of them has a multiplier effect. After the fall, many pests and pathogens overwintered on the alfalfa's surface debris, and in the autumn and winter, the pests were eliminated, which eliminated a large number of pests and pathogens, and reduced the infestation source at the beginning of the year. Grazing grazing targeted, livestock will eat a large number of stubble and weeds, will also eat pests, bacteria eat, destroy, carry. However, there are some kinds of insect pest eggs and germs that can continue to survive in the intestines and stomachs of livestock. As the faeces remain in the fields, they become the primary source of infestation of pests and diseases the following year. The machine destroys the debris, buries it, and changes the existing conditions for the formation of pests and diseases to achieve the purpose of extermination. In this way, the remains remain in the field, and the elimination effect is limited. They must be used in conjunction with other control measures. The thorough and effective method of burning is almost 100% effective in killing pests on the remains, and it is economical. However, attention should be paid to fire prevention and it is not applicable in many cases. Attention should be paid to stubble in the late autumn, winter and early spring can be, according to the actual situation of flexible use, can not affect the accumulation of nutrients before dormancy and return to green in spring. Irrigated irrigation can worsen the living conditions of pests and diseases, and suppress or kill pests and protozoa, especially in winter irrigation. At the same time, irrigation in winter is beneficial to wintering and returning green in the following year. Pesticide control has a long period of growth after the harvest from autumn to the next year. Using pesticides during this period will not only effectively kill all kinds of pests and diseases, but also minimize the amount of pesticide residues in alfalfa products in the following year. It is a better period for the use of pesticides, but it is necessary to pay attention to the effects of low temperature on efficacy and the role of pesticides on beneficial organisms.

Shampoo Massage Chair

Shampoo Massage Chair,Massage Recliners ,Shiatsu Massage Chair ,Portable Massage Chair

Massage Chair,Handheld Massager Co., Ltd. , http://www.nbmassagechair.com