Haplothrips tritici (Kurdjumov) (Bournier A. / ENSA Montpellier) Adults Still in ear of wheat.. Haplothrips tritici (Kurdjumov) (Coutin R. / OPIE) pupa Overwintering. The leaves of wheat are sucked by H. tritici adults, causing streaks. The ripening seeds of wheat are sucked by H. tritici nymphs, leaving brown spots caused by. PDF | The wheat thrips, Haplothrips tritici, is known from across eastern Europe and adjoining areas of Asia into western Europe and north.
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Features of biology, ecology and harmfullness of wheat thrips, Haplothrips tritici Kurd. Dry and warm weather during ear emergence and flowering of wheat the period of egg-laying and the beginning of larva feeding promotes increased insect survival; prolonged air drought and cool rainy weather are both unfavorable for insect development. During the pest outbreaks the larva density on sowing can reach and more individuals per ear Tanskii, The examination was done at the end of the naplothrips stage or the beginning of the wax-ripe stage of spring wheat.
Mature larva is bright red, haplothdips two setae at the end of abdomen. First larvae suck sap from ear scales and flower glumes, then from caryopsis. Trutici single generation develops per year.
A threshold of 80 individuals per ear was established for spring wheat and this was seldom exceeded. Krasilovets and Rabinovich reported that late winter wheat varieties were times more infested than early varieties. Lower densities of H. Zoology, Journal of Pure and Applied Biology4, — The southern Palaearctic genus Neoheegeria Thysanoptera: Ears with a close structure, having hqplothrips space between the scales, were less heavily infested than ears with a more open structure Shurovenkov and Mikhailova, If you would like to, you can learn more about the cookies we use.
Part of larvae metamorphosis occurs underground. The weight of grains of the sample containing the minimum population of thrips nymphs served as his standard of comparison. Close Find out more.
Haplothrips (Haplothrips) tritici – Thrips Wiki
Deutsche Entomologische Zeitschrift57, — In the Saratov region of the former USSR, duringtests were carried out in irrigated wheat fields to determine the injuriousness of H. According to data obtained by Tanskii the loss in weight haplothripx a rtitici mild infestation amounted to 5.
This method of estimating the damage done by thrips to grain crops gave low values since relatively uninfested grains were used as control and the damage caused by the insects until the grain ripened was not taken into consideration.
Wings with additional cilia, transparent, blackened at base. To a lesser degree the pest harms winter rye, barley, and other cereals. African Journal of Biotechnology10, — Eggs develop over a period of days.
AgroAtlas – Pests – Haplothrips tritici Kurd. – Wheat Thrips
The egg-laying period lasts days. The abundance of wheat thrips was times lower in rotation crops than in monocultures Antorenko, Female fecundity is estimated at eggs.
In the Cluj district of Romania inHaplothrkps. Volodichev reviewed the harmfulness of H. In Kiev, Russia, H. Since the damaged grain was not eliminated when milled, their presence much reduced the commercial value of the flour.
In central Anatolia, Turkey, H. The selection of varieties of hard wheat with characteristics that prevent H.
African Journal of Biotechnology
The main host plants are winter and spring wheat, rye, wheatgrass and some other gramineous plants; spring wheat is the most favorable for insect development. The nymphs and adults damaged the leaf-sheaths, ears and grains of wheat Tunc, Journal of Natural History42, — Most were found on winter wheat, with spring wheat, spring barley and winter barley less infested Zuranska et al.
The body is elongated, thin and black-brown to haplothdips. Kurdjumov first mentioned that H. Adults appear at the beginning of ear formation of winter cereals, usually in May-June.