First, the occurrence of pests and diseases:
The main pests and diseases affecting cotton bolls include four generations of cotton bollworms, followed by cotton blind mites, cotton leaf worms, and cotton spider mites. The number of previous rains was relatively high, leading to higher precipitation levels, which was not favorable for the third generation of cotton bollworms. In mid to late August, the average temperature remained close to normal, while the rainfall exceeded the usual levels. These overall weather conditions were beneficial for the development of the fourth generation of cotton bollworms.
Second, prevention and treatment methods:
1. Agricultural measures: Combine field management practices such as pruning cotton plants and removing unproductive flower buds. This helps in manually removing eggs, thereby reducing the need for chemical interventions.
2. Chemical control: Apply a 5% hexaflumuron emulsifiable concentrate diluted at 1000 times, or a 1% carbaryl salt solution diluted at 1000 times, or use pyrethroids and organophosphorus insecticides at a dilution of 1000–1500 times. To prevent premature aging of the cotton plants, it is also recommended to apply foliar fertilizers like potassium dihydrogen phosphate along with pesticide sprays.
In addition to these methods, regular monitoring of the fields is essential to detect early signs of infestation. Farmers should keep an eye on the weather forecasts and adjust their strategies accordingly. It's also important to rotate pesticides to avoid resistance development in pest populations. Integrated pest management (IPM) is highly recommended, combining both cultural and chemical approaches for more sustainable and effective control. By adopting these practices, farmers can significantly reduce damage and improve the yield and quality of their cotton crops.
lvl bed slat sprung bed slats wooden slat for bed
Radiata Pine Strip Plate,Naturally Radiata Pine Fingerboard,Radiata Pine Fingerboard
Linyi Lanshan Weipu Rubber Factory , https://www.weipuwood.com