In order to effectively eliminate pests in greenhouse farming, it's essential to install insect-proof nets on all ventilation openings. Before planting seedlings, it's recommended to use high-temperature treatment to destroy any existing pests or larvae. When introducing seedlings into the facility, ensure they are covered with fine mesh nets to prevent entry of external pests. Normally, greenhouses should remain closed and sealed to maintain a pest-free environment, significantly reducing the chances of infestation.
Once seedlings are planted and a small number of pests are detected, immediate action is necessary. Using diuretic fumigation or smoke-based insecticides can help control the problem. It's advised to perform fumigation every 5–7 days for two consecutive sessions to ensure complete eradication. This method helps target both adult pests and eggs that may still be present.
To enhance plant resilience before applying dichlorvos fumigation, it’s best to spray the crops with "Tianda-2116" diluted at 600 times one to two days prior. This improves the plant's ability to withstand stress, especially high concentrations of the pesticide, and minimizes the risk of damage during fumigation.
When using dichlorvos, it's important to choose the right time. Fumigation should take place at night when temperatures are lower, as this allows for longer exposure and better effectiveness. On sunny mornings, start fumigation around 9:00 AM and continue until the next day’s curtain is drawn. Afterward, ensure proper ventilation for 1–2 hours before re-entering the facility. High temperatures during the day increase pest respiration, allowing them to absorb more of the pesticide, leading to more effective control. If done twice within a 5–7 day period, it can eliminate adult insects, larvae, and newly hatched eggs, preventing future infestations.
As long as the facility is equipped with insect-proof nets and all guidelines are strictly followed, there will be no need for repeated pesticide spraying, ensuring a clean and safe growing environment.
During fumigation, it's crucial to monitor the temperature inside the greenhouse. If the temperature rises too high at midday, a few grass curtains can be used to provide partial shade, preventing overheating that could harm the plants.
Additionally, whiteflies are attracted to the color yellow. To manage them, you can cut yellow cardboard into strips measuring approximately 10 cm x 2 meters. Apply a layer of sticky oil—mixing 10th motor oil with a small amount of butter—to each strip. Place 30–35 pieces per acre, hanging them at the same height as the crop. This method effectively captures adult whiteflies and reduces their population. Once the cardboard becomes dusty, simply reapply the oil, ideally every 7–10 days for continued effectiveness.
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