Be careful of the outbeak of Brown planthopper (BPH) due to drought. The Department of Agricultural Extension revealed that during this hot and dry season Rice growers in the central and northern regions observed the period of BPH (Brown planthopper) pest attack on their field. The BPH body shape of an adult is brown to blackish-brown, with long-winged (flying) and short-flying (non-flying) types, able to move and migrate at near and far distances with wind. The adult females lay eggs in groups. Most of them lay their eggs on the rice leaf sheath. The area where the eggs will be bruised is brown. The eggs are bobbin-shaped, curved like a banana, with a white cloud. The larval stage is 16-17 days. Adult female with the long wing type is 4.0-4.5 mm. It lays about 100 eggs. The male is 3.5-4.0 mm. Short, laying around 300 eggs. Adults live about 2 weeks in one rice planting season. Brown planthoppers can increase 2-3 models.
Rice enemies the brown planthopper also known as Nilaparvata lugens (Stål) (Hemiptera: Delphacidae). The genus Hemiptera group. These are the bugs around 50,000 to 80,000 species of groups such as the cicadas, aphids, planthoppers, leafhoppers, and shield bugs. Miridae is an important predator that destroys BPH eggs. Most widely known mirids are species that are also notorious agricultural pests that pierce plant tissues, feed on the sap, and sometimes transmit viral plant diseases. Only some species however, are predatory. By sucking liquid in the egg, it is usually spread in the central region. And migrate in with BPH, If this type of bug is found in the field 2-3 times more than the brown planthopper, It’s able to control the increase in the amount of BPH without causing any damage to the rice production.
Lycosa pseudoannulata (Bosenberg & Strand) is a spider in the Araneae family. Lycosidae are the most predatory predators. This is the best option to control BPH. It controls the larvae and adult larvae of brown planthopper BPH in rice fields. Because it can be moved around in different areas of the rice field, it will be moved into the rice fields after sowing and will increase the amount of rice in the tillering stage
*** Consider this has best natural option to control BPH ***
Leave the predator Wolf Spider, Lycosa pseudoannulata in the farm. They can consume all the prey individuals of Nilaparvata lugens in 3 days. Other predators like ladybird beetle, carabid beetle can help little. Also, Light traps of 380-400 lux from energy saving lamps showed maximum effect in reducing the pest brown planthopper. Other best way is to spray #Raithep plant nutrient supplement on plants from the start of planting #Rice. Along with nutrients, it has a smell that pests don’t like, and your rice plant is naturally grown well.
RaiThep recommends that rice growers do the following:
1. Use RaiThep to spray as a mist onto the leaf. The raithep smells that pests do not like, causing the pests to stay away or not fly towards fields. And most importantly, Rai Thep will help increase nutrients to rice. Causing the rice plants to grow quickly and with good quality.
2. Regularly survey the plantations every week. And shouldn’t let the high level of BPH spread.
3. In areas with outbreaks, especially during the period of rice plant growth, control water levels in the rice fields. To let soil get wet or have soil water drained for 7-10 days and then let the water leave to dry by themselves. This is an alternative to help reduce the outbreak of BPH.
4. Do not use substances that are highly toxic to suck eggs, such as Abigatin. And substances in synthetic pyrethroid groups. Take natural steps and avoid chemical pest controllers – as they are #toxic. Whereas Raithep is #non-toxic small fine nutrients for plants, Mix with water easily.
5. Choose the varieties recommended by the government, such as RD 29, RD 31, RD 41, Phitsanulok 2, Suphanburi 1, Suphanburi 2, Suphanburi 3, Suphanburi 90, RD47 or RD49 and and in the same area, grow a variety of rice. To delay the adjustment of #BPH And should not be planted on a single species consecutively for more than 4 planting seasons.
6. Plantation should be done alternately between highly resistant varieties or durable or medium weak varieties. Consider the harvesting age to be similar. This is to reduce damage when a severe outbreak of pests occurs.
7. Should not sow rice too tight or near to each other. Use the rate of approximately 15 kg / rai or transplanting rice seedlings. For the rice to be strong And spray thoroughly.
8. Avoid too much nitrogen fertilizer ( #NitrogenFertilizer should not exceed 50 kg / rai) because the green rice leaves are dense, the rice plants are succulent which is suitable for sucking and breeding of BPH. As well as suitable for many plant diseases.
Note: Use of Nutrient Supplement to grow #Plants from Raithep, helps to reduce fertilizer by 70%. Means, save money / cost of production with better plant growth, High Q