1 leaf spot
(1) Drainage should be done in time after rain, and flooding is strictly prohibited.
(2) Spraying 36% thiophanate methyl suspension 500 times, 70% thiophanate methyl wettable powder 600 times, 60% mildew-proof ultrafine wettable powder 800 times, 75% chlorothalonil wettable powder 600 times, 50% benomyl wettable powder 1500 times, or 50% carbendazim at the onset.
2. Anthrax
(1) Clear weeds and residual leaves in the field in time after harvesting; Before sowing, dig deep into the soil and wrap the seeds with seed coating agent before sowing.
(2) The farmyard manure used must be completely decomposed.
(3) When the disease occurs, spray 800 times of 80% anthrax thiram wettable powder, or 700 times of 30% copper oxychloride, 500 times of 70% mancozeb wettable powder, 400 times of 77% bactericide wettable powder, 500 times of 50% mixed sulfur suspending agent and 65,438+0,000 times of 25% suspending agent. The above drugs are used alternately and stopped 5 days before harvesting.
3. Root rot
(1) When applying fertilizer, use fully decomposed organic fertilizer to make the soil organic matter content higher than 2% to prevent soil acidification.
(2) Prevent excessive humidity in the field and avoid high humidity environment.
(3) Spraying 500 times of 50% thiophanate-methyl wettable powder, 500 times of 50% carbendazim wettable powder, 800 times of 60% mildew-proof ultrafine wettable powder, or 50% benomyl wettable powder 1500 times at the onset of the disease, and stopping the drug three days before harvesting.
4. Brown spot disease
(1) After harvesting, clean up the residual leaves and germs in the vegetable garden in time.
(2) Spray 500 times of 70% mancozeb dry suspension, 600 times of 36% thiophanate-methyl suspension, 600-700 times of 50% carbendazim wettable powder, or 50% benomyl wettable powder 1500 times, and spray 6544 every 7- 10 days.
5. White rust
(1) Before sowing, seed is dressed with 0.3% of the seed weight.
(2) Spraying 48% metalaxyl manganese zinc wettable powder, 40% metalaxyl copper wettable powder, 600 times 64% antiviral alum wettable powder, or 800 times 72.2% prochloraz solution every 7 7- 10/day 1 time, every 2-3 times/kloc-0.
The above contents refer to Baidu Encyclopedia-Ipomoea aquatica (Ipomoea aquatica).