The better the cultivation efficiency of spinach in summer, but in the process of management, it is easy to happen to different degrees of dead tree phenomenon. In severe cases, the whole shed room will die, causing great losses to the farmers. The following is a summary of the reasons for the death of spinach in summer and the prevention and control measures, I hope to be helpful to everyone.
Blight
Spinach from the seedlings to the adult plants, will be infected by the blight, causing dead trees. After the spinach seedlings were unearthed, after the infection by Rhizoctonia solani, the cotyledons first wilted, and after the disease continued to occur, the plants rotted from the roots and collapsed. After the seedlings are infected, the lower leaves first turn yellow. After the continuation, the main roots of the spinach become black and rot, shrinking and dying. Control: 1000 times 20% methyl chlorophosphorus emulsifiable concentrate can be used for irrigation.
Fusarium wilt
The wilt of spinach, the disease is likely to cause dead trees during the adult planting period. The infected plants often appear dark and tarnished, the leaf flesh is gradually yellowing, and the roots gradually become brown and die. Plants with early onset are obviously poor in growth and dwarf. In summer, the environment is hot and humid, and the diseased plants are quickly wilting, yellow leaves and dead. Control: 1000 times of chlorobromoisocyanuric acid can be used to control roots.
Heart rot
Spinach heart rot is thought to be mainly caused by the base of the stem and the heart leaf, and the dead tree is likely to occur after the onset. Unsterilized seeds are susceptible to disease after germination. After the seedlings are unearthed, the base of the stem becomes dark brown, contracted, causing sudden death or decay, resulting in dead trees. Control: It can be sprayed with 25% Amishida Suspension 1000 times solution or 50% Isocarburon Wettable Powder 1000 times solution.
Rainwater irrigation
In the cultivation and management of spinach in summer, it is forbidden to let the rain water be poured. Once the rainwater is poured, it is easy to cause dead tree phenomenon. Therefore, in daily management, it is necessary to do rain prevention measures to ensure that rainwater is not allowed to water the plants.
titanium iron
HUNAN ZHONGNAN ANTIMONY&TUNGSTEN TRADING CO.,LTD , https://www.znat.com.cn