Comprehensive control technology of Spodoptera exigua
The beet armyworm belongs to the Lepidoptera Noctuidae, also known as the night robber moth, Spodoptera exigua, cabbage brown night moth, is a multi-edible pest that is harmful to vegetables, but also a strong migratory, intermittent outbreak damage Important pests. Due to repeated use of pyrethroid pesticides in successive years in recent years, the drug resistance of Spodoptera exigua has been enhanced, and the damage has increased, which seriously threatens the safety of agricultural production.
The strategy for the comprehensive management of Spodoptera exigua is to strengthen monitoring and forecasting, pay close attention to the prevention and control of early host lands, master the egg period, use more biological pesticides, and pay attention to rotation of drugs.
Main technical points: Adhere to adult and egg period monitoring, accurately grasp the timing of prevention and control, eradicate weeds in and outside the field early in the period from the beginning of May to June, and pay attention to the prevention of Spodoptera exigua in early-onset fields such as onions and corns; The period is dominated by chemical control, and the main applications are Miman, Xixi, Green Trane, Dijuan and other agents. Replanting plots can use foliar spray plus ground bait. Neutral laundry detergent, diesel oil and other synergies are added to enhance the control effect. It is best to use pesticides in the morning or evening of the egg's peak period, pay attention to the alternation of pesticides with different mechanisms of action, and avoid the use of highly toxic organophosphorus pesticides or multiple use of pyrethroid pesticides. In combination with the use of artificial catch insects, spawning eggs, light trapping, sexual lure trapping and other measures.
(1) Watering in flood season. From July to August, during the peak period of Spodoptera exigua, the field was watered to saturation, and the use of high-temperature, high-humidity environment to eliminate earthworms, reduce the emergence rate and reduce the next generation of adults.
(2) cultivating crops. In fall and winter, in combination with Hughuta, cultivator deep-turning, freezing or drying, using high temperature (sun) and low temperature (frozen) to kill insects, the rate of outbreaks of about 30%, to reduce the generation of the next generation The base number has a certain role.
(3) Remove weeds. Spodoptera exigua prefers to lay eggs on gray weeds, barnyard grass, leeks and other weeds. The timely removal of weeds in fields and fields effectively reduces insect sources.
(4) Intercropping and rotation. Using the difference in preference of host beet armyworm for host crops, intercropping or rotations were intercropped to reduce hazards.
(5) Fine soil preparation. Using ploughing and cultivating before planting, turn the earthworms into deep soil or destroy the earthworms to kill insects.
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