Pest Type: Rice Pest
Family: Aphididae Aphids
Distributed in the steppe and forest-steppe zones. It damages rice, sorghum, corn and other cultivated and wild cereals.
A wingless parthenogenetic female of a female genital form, whitish-green; head, antennae, legs, tubes, tail and transverse stripes on the abdomen black-brown; body in sparse short hairs, antennae less than half the length of the body; the tubes are small, not larger than the finger-shaped tail. In the winged female, the head and thoracic part are black-brown, the tubules are shorter than in the wingless one. Development is incomplete cyclical.
Wingless parthenogenetic females and larvae overwinter on wild grasses, of which spring and summer spread to rice fields. Fields populate gradually, starting from the edges to the center. The number of aphids in the center of the field peaks in early July.
Aphids settle on the underside of leaves, in the sinuses, first on the tops, and then on the entire plant. On irrigation lynx, these pests first appear along canals and on shafts, as well as on plants weakened due to a violation of the water or nutritional regime. In August-September, winged insects settle on cereal weeds, where larvae and adults hibernate. Damaged leaves first lighten, then turn yellow, with mass reproduction of the pest, they curl and dry. The pest is a carrier of viral diseases.
At least 12 generations develop in a year.
Protective measures. Depriving aphids of the additional food supply by destroying weeds (mowing canals, spatial isolation of crops on land). Mowing weeds below water level. Chemical protection with permitted drugs during EPV during emergence-tillering of 1-2 individuals per stem in the tubulvannia phase and later 10-15 individuals per stem. Along with sorghum aphids, ordinary, large, cereal and other aphids similar in nature to the damage are damaged in rice.