What Causes the Drop of Passion Fruit?
This article introduces the reasons for the drop of passion fruit in the aspect of green plants and flowers. Detailed introduction is as follows.
What Causes the Drop of Passion Fruit?
The drop of passion fruit may be caused by excessive application of nitrogen fertilizer, excessive growth of vines, or insufficient nutrition, lack of trace elements such as boron and magnesium. Additionally, diseases and pests can cause poor development of floral buds, and diseases like stem rot and blight may cause a large number of fruit drops. The preventive measures include proper fertilization and attention to the control of diseases and pests.
Reasons for the Drop of Passion Fruit
1. Excessive application of nitrogen fertilizer, excessive growth of vines, or insufficient nutrition, lack of trace elements such as boron and magnesium, which can affect pollination, fertilization, and cause fruit drop. 2. Pest and chemical damage: Thrips can damage the flower organs, while fruit flies can damage young fruits, leading to flower and fruit drop. Improper use of systemic herbicides or pesticides can also cause flower and fruit drop. 3. Viral diseases often cause poor development of floral buds, and diseases like stem rot and blight may cause a large number of fruit drops. High temperature and dry weather during the flowering period, strong wind, heavy rain, and low temperature below 15°C can also affect flowering, pollination, and fertilization. Soil deficiency of fertilizer, severe occurrence of diseases and pests, drought, excessive rainfall, abnormal temperature, insufficient light, etc., can all cause fruit drop.What to Do When Passion Fruit Drop Is Severe
Take preventive measures before continuous flowering and fruit setting, spray micro supplements for flowers and fruits to reduce flower and fruit drop. Use 2500 times 52.5% picoxystrobin, cyazofamid water-dispersible granules, or 600 times 58% metalaxyl-M zinc wettable powder, or 600 times 72% cymoxanil, zinc wettable powder, or 600 times 69% dimethomorph, zinc wettable powder, or 2000 times 50% azoxystrobin water-dispersible granules for spray control, which are very effective. To increase fruit setting in passion fruit, spray 5 degrees Baume lime sulfur solution or 500 times mancozeb solution to control red spiders, scale insects, various mites, and diseases like leaf spot and perforation. During the period of shooting after flowering, spray chlorpyrifos and pymetrozine to control red spiders, aphids, leaf miners, leaf rollers, and pear sawflies. Adding boric acid spray during full bloom can improve fruit setting. During the young fruit stage to fruit coloring, spray insecticides and bactericides such as fenvalerate 2000, chlorpyrifos 2000 times, carbendazim, and thiabendazole 800-1000 times solution.Prevention Methods for Passion Fruit Drop
1. Install irrigation facilities in orchards with conditions, or water the garden with flowing water or manually spray water before 9 am to lower the temperature. Appropriate artificial pollination can be performed. 2. Apply organic and bacterial fertilizers properly, and apply flowering and fruit-setting fertilizers in time, with multi-element compound fertilizer 0.1-0.2 kg per plant and potassium sulfate magnesium fertilizer 0.1-0.15 kg per plant. 3. Spray zinc and boron trace element foliar fertilizers on leaves during the bud differentiation stage and flower bud stage before flowering. 4. Do not use herbicides and pesticides improperly, avoid using systemic herbicides (such as glyphosate), and do not exceed the dosage when spraying other herbicides to prevent the solution from seeping into the soil and damaging the roots. 5. Perform pruning and thinning of leaves, especially for the second and third batches of fruiting, cut overlapping vines and flowerless vines, and thin leaves appropriately to ensure good ventilation and light transmission in the fruit shed and avoid nutrient consumption. 6. Strengthen the prevention and control of diseases and pests, and prevent major diseases like (F-Y) disease and stem rot.The above introduction covers all the content about the reasons for the drop of passion fruit, and green plant enthusiasts may refer to this aspect for reference.