Occurrence and Control of Wheat Aphids
Wheat aphids are also called insects. In recent years, the cultivation of wheat areas has often caused damage, especially in the conditions of good fertilizer and water, and the growth of flourishing fields is more serious. The early stage of damage caused yellow wheat seedlings, which affected growth. In later stages, yellow spots appeared on the damaged parts. The yellow wheat leaves gradually became yellow, and the wheat grains were not full. In severe cases, the wheat ears were pale and could not be solid and even the whole plant died, seriously affecting the yield.
There are many types of wheat aphids, but the main ones are spring wheat aphid, wheat long aphid, earthworm, and corn borer.
The main features of damage and prevention:
Time of damage
The seedling stage is seriously affected by spring wheat sprouts and alfalfa. After the jointing stage, the adult plants are seriously damaged by the wheat and the stubble, and the corn alfalfa is often severely damaged in some fields. From the point of view of the locust species, spring wheat sprouts occur earlier, followed by wolfberry pods, and wheat stalks occur later. There are two peak periods of locust infestation in Honghe Prefecture, and the first peak period occurs in the middle and late December. The second peak occurred in the middle and late March of the following year, and the second peak is the greater impact on wheat yield. period.
Damaged parts
Spring wheat buckwheat is mainly at the base of wheat; buckwheat is mainly at the base of the roots and stems: wheat longbow quail is mainly damaged in the middle and upper leaves and panicles.
Main control methods
According to the characteristics of locust infestation, field inspections are conducted from the beginning of the current and early February. In the seedling stage, as long as 30 to 60 heads per square meter are to be controlled, 1 to 20% of the sorghum strains should be planted during the booting period. The average number of locusts per plant is about 10 or so.
Per acre with 20% chrysanthemum EC 80 ml, 20% Alum net 60 ml, 40% Potenta 80 ml, 25% Gendolo 60 ml, 2% Astragalus 80 ml, 5% Lectra 50 ml, 3 % 劈蚜 60 ml, one of the above pesticides, watered 35 to 50 kg (2 to 3 buckets of water), sprayed dry in the morning or after 4 pm. If it happens more serious. Each barrel of water plus a pack of 10% imidacloprid mixed spray.
In the booting stage and heading stage, potassium dihydrogen phosphate or multi-fertilizers, such as potassium dihydrogen phosphate, can be added and mixed to spray the preserved fruits and fertilizers to promote ripening of the grains and increase the yield. (Miller County Seed Station)
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