Playing the occurrence of powdery mildew and melon

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Playing the occurrence of powdery mildew and melon Chemical Control Test

Appropriate,[link widoczny dla zalogowanych], the disease spread quickly, in the end of July, early August,[link widoczny dla zalogowanych], then reached a peak occurrence of disease to occur throughout the field, the incidence rate of 100%, dead leaves, dried plants and even death. Figure l2.3 pharmaceutical test results from the trials showed that the best Fuxing prevention and control, the control effect of 76.9l% and 77.02%, followed by the enemy Li Kang, a second control effect after application of 73 .90%, love and traditional pharmaceutical triadimefon can be the second lower control effect after application, respectively, 65.16%, 68.46%. Lucky star by analysis of variance and the enemy force was no significant difference in health,[link widoczny dla zalogowanych], and love can be, and triadimefon were significantly different, love can be, and triadimefon were no significant differences. Therefore, the proposed pre-production occurs in the disease, that is the end of June, early July, can be sprayed lucky star, love can be, triadimefon to prevent, the disease can be sprayed after the lucky star, the enemy forces to prevent and treat health, several alternate spraying of pesticides to avoid spraying insecticides alone. Spraying 3-6 times throughout the growth period, every 7 ~ 10d1 times, can play a good control effect. Table 1.1052 * Agricultural Sciences Volume 46, 1O0908O706050403O2010O7-97-127 for a l57-187-217-247-277-308-28-58-88-11 Figure 1 playing field melon powdery mildew growth and decline of Fig. 1Thegrowthanddeclineofwatermelonpowderymildewinfield Table 1 when the rally field melon powdery mildew of several fungicides results Table1Theefficacyofseverallingfungicidecontrolwatermelonpowderymildewinthefield3 3.1 Conclusion and discussion play mainly against powdery mildew in melon leaves, vine, fruit surface is also covered with severe white powder in the production of rare. The descriptions of the symptoms keep loose sheets, and so the same pool Geumsan ��l, 2J. 3.2 hit mainly by air currents melon powdery mildew caused by re-infection, conidia was born in leaves infected directly after germination. Through the survey found that more than 80% relative humidity, temperature 20 ~ 24 ~ C the most suitable for powdery mildew incidence and prevalence [3], the temperature is too high or too low but the prevalence of powdery mildew inhibit ��9j9. In suitable condition, the disease spread quickly, in the end of July, early August, the peak occurrence of disease can be achieved, the entire field occurs, the incidence rate of 100%, dead leaves, dried plants and even death. 3.3 The investigation by the field, playing the initial stage of 7 melon powdery mildew early in suitable condition, the disease spread very fast ,5-7d can be spread to all Tianfa Sheng, damage was severe, the occurrence of an area, the proposed grasp melon powdery mildew prevention to fight forecasting, timely spraying symptomatic control. 3.4 through efficacy trials,[link widoczny dla zalogowanych], screening out the better control the production of pharmaceutical, lucky star 8000 times, 1500 times the enemy Li Kang, prior to spraying in the occurrence of disease prevention, anti-integration ruling. Time after the onset of spraying, spraying should not miss the best time to control the whole growth period of 3 to 6 times of spraying,[link widoczny dla zalogowanych], spraying every 7 ~ 10d 1, you can achieve good control effect.