Quantitative air spore traps are very important for the study of spores. He captures spores in the air and provides samples for research. In general, the annual number of in-flight spores can be divided into four different stages. The number of spores in the winter foreseen period has little relationship with the prevalence of powdery mildew, and the rapid increase in the number of spores in the epidemic phase is a manifestation of the disease epidemic through quantitative wind spore capture experiments. Only the epidemic initiation period determines the prevalence of powdery mildew in the year. crucial moment.

The optimum air temperature for spore capture by quantitative airborne spore traps is 20-25°C, and the daily average temperature is lower than 19°C or higher than 26°C, and the trapping volume is significantly reduced. Rainfall can promote the settlement of spores. Therefore, there is little catch on rainy days and the amount of sunny catches after rain increases sharply. The breeze is conducive to the spread of powdery mildew, and the amount of spores trapped by quantitative airborne spore traps increases. However, the spores of wind speeds below 0.2 m/s and above 3.0 m/s are significantly reduced.

The number of aerial spores is closely related to the condition of powdery mildew in the forest section. A quantitative airborne spore trap capture test showed that the number of aerial spores was positively correlated with the total incidence of forest segments after 5 to 7 days. When the number of spores captured on each slide reached 10 or so, the number of spores increased sharply, and the forest section became worse after 5-7 days.

The mastery of the occurrence and quantity dynamics of aerial spores during this period through quantitative airflow spore traps is a condition and basis for predicting the final condition and determining the first application period. Spores at the end of the winter and early spring when the gum trees began to draw leaves the rubber tree powdery mildew spores, with the gum tree leaf extraction rate increased simultaneously. Subsequently, as the temperature increased, the young leaves became old, the sporulation capacity decreased, and the aerial spores gradually decreased, so that the quantity of quantitative wind spore traps was also affected.

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