2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
The six-point leafhopper lives almost everywhere, damaging a huge number of a wide variety of crops: beets, millet, rye, perennial legumes, wheat, sunflowers, oats, buckwheat, corn and barley. Harmful leafhoppers in a fairly short time suck life-giving sap from the leaves, as a result of which the growing crops gradually discolor, weaken and wither. Moreover, not only the larvae, but also the imago of six-spotted leafhoppers can harm. And they also contribute to the transfer of numerous viral diseases, therefore, it is necessary to deal with six-point leafhoppers with special care
Meet the pest
Six-point leafhoppers are endowed with a rather slender body, reaching a length of 3, 2 to 4 mm. Their color is usually yellowish-green, and there are fairly clear black patterns on the shields and heads. The heads of the six-dotted leafhoppers are slightly wider than the pronotum, and between the eyes of the pests, one can notice a pair of little black round spots. The transparent-smoky elytra of the parasites are painted in yellowish-whitish tones and are equipped with light veins.
The eggs of six-spotted leafhoppers are overwintered both in the root parts of the stems and in the tissues of the leaves of winter cereals. Closer to the end of April or with the onset of May, brownish larvae hatch from the eggs, acquiring the color of adults in the process of their development. At first, they are painted in dirty brown tones and are distinguished by dark spots on the vertex and a brownish edging of the abdominal segments. The development of harmful larvae takes from twenty to thirty days in time, and in such a short period of time the parasites manage to overcome as many as five centuries. The larvae are especially active in sunny weather, when the air warms up to twenty-eight - twenty-nine degrees. And the greatest number of six-spotted leafhoppers, as a rule, is observed in July and August.
The females of the first generation lay eggs in the leafy tissues of cereals, while immersing them in plant tissues by about three quarters. The duration of embryonic development of six-point leafhoppers is from twenty to forty days. It is noteworthy that during the summer season, harmful parasites have time to develop in two, and sometimes even in three generations. With the onset of autumn, females lay eggs on carrion and winter cereals. As a rule, during autumn cold weather, the harmfulness of gluttonous parasites is noticeably reduced.
If the six-point leafhoppers damage the vegetation at the stage of its hatching, then the crops begin to lag behind in growth, and the sterility of their spikelets decreases along with the volume of the inflorescences, which significantly complicates the already difficult process of their growth. And the leaves of crops attacked by these parasites often twist along the veins.
How to fight
An important preventive agrotechnical measure in the fight against six-point leafhoppers is the elimination of grain crops from the plots, which serves as an excellent reserve for pests. It is equally important to try to make every effort to prevent the formation of carrion in these crops. Early fall plowing and stubble plowing, as well as the use of high-quality potash and phosphorus fertilizers, will serve well in this difficult task. It is imperative to deal with weeds.
Sowing winter crops early should be avoided whenever possible. And the seedlings of winter crops are often sprayed with insecticides, paying special attention to the marginal stripes. An excellent effect is also given by pollinating growing crops with hexachloran dust or metaphos.
As a rule, after treatments against six-point leafhoppers, the juicy color of the grown crops is restored quite quickly - this is due to the actively growing intact leaves.
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