Analysis of the Causes of Spinach Plant Death in Summer Cultivation and Control Methods
When spinach is grown through the summer, with proper management it can often bring excellent economic returns, but during this process plant death often occurs, and in severe cases all the spinach in an entire greenhouse plot dies, causing huge economic losses for farmers. So what causes spinach plant death? How should it be controlled? Let's take a look together with Qinnong.com.
1. Rhizoctonia rot (damping-off)
Rhizoctonia rot is one of the causes of spinach plant death in summer cultivation, and it can infect plants from the emergence of seedlings all the way through to harvest. After spinach seedlings emerge, once troubled by rhizoctonia rot, the leaves first begin to wilt, and as the disease progresses, the roots of the seedlings begin to rot and the plants topple over and die. After mature plants are infected, the leaves begin to turn yellow, until later the stems turn black, rot and die.
Control methods: When planting, choose seeds with strong disease resistance, then disinfect the seeds, and at the same time plow the soil deeply. Remove diseased plant residues and disinfect the soil. After the disease occurs, a 1000-fold dilution of 20% tolclofos-methyl emulsifiable concentrate can be used as a soil drench for control.
2. Fusarium wilt
Fusarium wilt easily causes plant death in mature plants. After spinach is infected by the pathogen, the leaves begin to darken and lose their luster, the leaf mesophyll tissue gradually turns yellow, and finally the roots dry up, turn brown and die. In the early stage of this disease, the plants are noticeably stunted and grow slowly; especially in summer cultivation, in the high-temperature and high-humidity environment, after the disease occurs the plants wilt, yellow and die at a very rapid rate.
Control methods: The early prevention methods are the same as for rhizoctonia rot. After the disease occurs, a 1000-fold dilution of chlorobromoisocyanuric acid solution can be used as a soil drench for control.
3. Heart rot
Heart rot mainly harms the stem base and heart leaves of spinach, and after the disease occurs it very easily leads to spinach plant death. If the seeds are not disinfected at sowing time, they are very easily infected after germination, and after the seedlings emerge, the stem base begins to discolor and constrict, and finally dies and rots, causing plant death.
Control methods: Be sure to disinfect the seeds before planting to ensure the seedlings can emerge very quickly. After the disease occurs, a 1000-fold dilution of 25% amisulbrom suspension concentrate or a 1000-fold dilution of 50% iprodione wettable powder can be sprayed for control.
4. Rainwater irrigation
Summer is inherently a hot and rainy season. When growing spinach through the summer, by no means allow it to be irrigated by rainwater; once it is irrigated by rainwater, plant death is very easily caused.
Control methods: Therefore, during summer cultivation, preventive measures against rainwater must be well implemented, and rainwater must not be allowed to irrigate the plants.
The above are the causes of spinach plant death in summer cultivation and the control methods brought to you by Qinnong.com. We hope they can help you. To learn more, please stay tuned to Qinnong.com.