Rice has entered the jointing and prosperous stage, plant growth is strong, rapid population growth in the field, high humidity, high temperature, very conducive to the development of a variety of rice pests. Rhizoctonia solani is developing rapidly and causing serious damage; rice blast is endemic in some plots; bacterial blight is beginning to develop in the old wards; and the number of bases of the second-generation borer is higher than that of last year; leafhoppers, brown planthoppers, and white-backed flycatchers migrate. Into the peak, the insect volume is higher than last year. During the jointing and booting stage, the compensatory ability of rice has fallen, and the prevention and control of pests and diseases and the protection of production have entered a critical period. All towns and villages must seize the opportunity to carry out prevention and control.
First, what happened
1. Rice Sheath Blight: Systemic field on July 29, the diseased hole rate was 6%, and the diseased plant rate was 0.64%. July 31 Daejeon census: Sheath blight occurs prevalently in paddy fields in our county. The diseased field rate is 100%, and the average diseased hole rate is 17.2%, which ranges from 2% to 71.4%. The whole county will focus on occurrences, and some plots will occur.
2. Inaba: On July 26th, the incidence rate of diseased rice fields was 60%, and the average sickness rate of diseased field plots was 1.5%. The amplitude ranged from 0.5% to 30%. The expansion was rapid and some plots occurred.
3. Bacterial blight: At the end of July, the onset center appeared in the old ward. Due to the large area of ​​susceptible varieties in our county, bacterial blight occurred in previous years and the bacterial source was abundant. In particular, the old ward of bacterial blight has a pandemic trend.
4. Second-generation Sichuang: The moth was seen on July 28, and the number of second-generation insecticides was estimated to be 42 per mu on July 31, 80.3% higher than last year. The first peak of egg hatch was around August 10, and the second peak of egg hatch (main peak) was later than last year, around August 21-22. The forecast occurred moderately and occurred in some areas.
5, rice leaf roller: under the lamp (black light), see a head on July 25. The system Tianmo moth five (3) generation saw it on July 19, with a moth volume of 30 heads/mu. On July 21-25, a cumulative total of 2180 heads/mu of moth was recovered, including a moth peak on the 24th and a total of 1,510 moths. / Mu, cumulative total of 630 heads/mu of moths on July 26-31, and peaks on August 2nd, with 570 moths and 9 larvae (including 1 head and 2 heads, 2 heads and 3 heads). 3 instars and 5 instars) 25 eggs and 8.3 shells. On August 3, 270 moths were driven, and on August 4th, 240. In the field census, on the 24th of July, the average moth was 994 heads/mu. On the 25th of July, the average amount of moths was 236 heads/mu. On July 31, the average amount of moths was 38.1 heads/mu, and on August 2th, the amount of moths was 478.4 heads, and the high field masses were 1,100 heads. According to the calendar method, a 1st instar larval peak will appear on August 8-11.
6. White-backed dovetails: Under the lights: 1 Frequencies of vibration test report lights: Four (1) generations met on July 3, 7 days later than last year, and on July 3-4 accumulated total of 68 insects, of which July 4 The number of insects on the day was 52. 2 Black light: On July 20, 1 bug was seen. As of July 31, a total of 38 insects were trapped, an increase of 153.3% over the same period of last year. On July 29th, the number of back-fly locusts in the system was 824 heads per hundred holes. The larvae of the main worms were dominated by young nymphs, and the effective eggs were 1812 grains per hundred holes. In the Daejeon survey on July 31, the county's weighted average insect mass was 87.4 heads per hundred holes, and the weighted average egg mass was 32 pills per hundred holes.
7. Nilaparvata lugens: Five (2) generations of brown plant flycatchers saw seven heads on July 25th, one at the same period last year, and on August 2nd, the system field surveyed 22 apical insects and adopted the strategy of controlling pressure and preventing five (2). The generation controls six (3) generations.
Second, prevention advice
Due to frequent rainfall and heavy rainfall this year, it has brought great inconvenience to field use. At the same time, the period of occurrence of migratory pests is not neat. Therefore, it is necessary to grab a sunny day to catch the rain gap within the appropriate period of prevention and control, without losing the opportunity to use drugs to prevent and control. General management of sheath blight, vertical leafhopper, fly fleas, pick and treat rice leafhoppers, block bacterial blight, concurrent treatment of the second generation of the second peak of insecticide and other pests. At the same time, attention should be paid to the prevention of individual ear blasts in early burst plots.
1, prevention and treatment time: August 8-11.
2. Control agents: 140% chlorpyrifos 100 ml + 25% pymetrozine 20 grams per acre; 215% adipotoxic emulsifiable concentrate 80 ml + 25% buprofezin 40 g; 35% avermectin 20 ml + 25% 150 milliliters of peperal EC is used, and the formula of the drug is alternated with that of the previous one, and 4 bags of 20% Jinggangmycin powder are added. In addition to 25% per acre, the rice leaf pod borer field will make 100 grams of emulsifiable concentrate 40-50 milliliters or 20% tricyclazole (single dose) 100 grams. Bacterial blight field alone medication, mu 50% bromobromoisocyanuric acid 50 grams or 20% Yejing 100 grams or 50% Kezi Zhuang wettable powder 70 grams, the above pharmaceutical formulations optionally a watered 50 kg Evenly spray or dilute 10 kg of mist.
Third, note:
1. The use of methamidophos, high toxicity and high residue pesticides that have been banned by countries such as methamidophos, 1605, etc., are strictly prohibited and personal protection must be observed. 2. Avoid high-temperature spraying during spraying. Apply before 9:00am and after 5pm every day. Observe the use of pesticides in the field of bacterial leaf blight. It should be done after dew in the morning or before dew in the afternoon. The center of the center is sprayed inwards to prevent artificial and field skewing. 3, spraying water must be enough, spraying should be uniform. At the same time, rice fields need to protect shallow water layers. 4. Pesticide packaging after use should be disposed of in a centralized manner. It is not allowed to discard the polluted environment at will to prevent human and animal poisoning.
SHANDONG JOIN & SHARE AGRICULTURAL DEVELOPMENT CO., LTD , https://www.joinsharemushroom.com