Root-knot nematode is a parasitic omnivorous pest that becomes endemic when the temperature is stable at 20 °C and the humidity reaches more than 40%. Astragalus is based on roots as the main economic part, and the occurrence of root-knot nematodes will directly affect the quality and yield of astragalus. So, is octyl thion useful for Astragalus root-knot nematodes? How to plant astragalus to prevent soil-borne insect pests? Let's take a look at that.
Is octyl thion useful for Astragalus root-knot nematodes
Octyl thiophos is a widely used insecticide, which has a good performance for common pests including inchworms, whiteflies, smoke green insects, cotton worms, red worms, ground tigers, small gray cicadas, etc., and is often used for the control and killing of underground pests.
Astragalus root knot nematodes in the environment under the right conditions of rapid disease, the reaction to the use of octyl thion is not obvious, that is, the control of astragalus root knot nematodes, the use of octyl thion is not particularly effective, the use of pesticides in agricultural planting to prevent and control the development of root knot nematodes, more commonly used more effective medicinal fertilizers include cotton long, avermectin and thiazolephosphine, etc., the effective period is more ideal than the usual insect control effect. However, in the cultivation of root crops such as astragalus, it is recommended to combine the method of insecticide in the cotton shed and the root extermination of biological bacterial fertilizer to be safe and efficient.
How to plant astragalus to prevent soilborne insect pests
Astragalus is a rhizome crop, the occurrence of nematodes, ground tigers and other soil-borne insect pests, biting the root system or intercepting the growth of aboveground plants, is a common soil-borne insect pest that leads to poor crop growth and yield reduction.
Considering the growth characteristics of astragalus and the prevention of soil-borne diseases, in the use of medicinal fertilizers:
1. Sprinkle a tube of insecticidal fertilizer with the base fertilizer, which has a good preventive effect on common caddisflies, ground tigers, golden needle worms, and some aphids.
2. Before turning the soil for planting, the use of cotton long with the mulch film together for stuffing shed, for the root knot nematode, kowtow worm, May golden turtle beetle and so on has a good preventive effect.
3, astragalus planting control root knot nematodes, the use of line warped lilac violet bacteria biological fertilizer about a week or so to irrigate the roots twice, specifically for the killing and anti-insect work of nematodes, biological fertilizer on the soil regulation effect on the healthy growth of astragalus also has a good performance.
It should be noted that specifically for astragalus root knot nematode disease, it is generally not recommended to use contact insecticide spraying during the growth stage, because after the drug is transmitted to the rhizome with the stem and leaf, it can form a certain residue in the rhizome fruit, which may have a negative impact on the safety or adverse effect of medicinal edibles. For more suggestions on measures for the control of astragalus diseases and insect pests, please leave a message or private message to us for more detailed answers.