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.
|Published (Last):||7 February 2006|
|PDF File Size:||15.22 Mb|
|ePub File Size:||16.50 Mb|
|Price:||Free* [*Free Regsitration Required]|
A study of the damage to crops by thrips under the natural conditions prevailing in southern Ukraine was carried on for four years. Eggs develop over a period of days.
In central Anatolia, Turkey, H. Tanskii took the following symptoms as indicators of the degree of grain infestation: The ripening seeds of wheat are sucked by H. Yritici the author Login required. When selecting wheat varieties resistant to H.
In Russian Grivanov K. Adult has immature ovaries and requires additional feeding. Continuing to use www. Tastenov and Shul’gina reported that fenvalerate applied between wheat germination and heading may control wheat thrips. Chemical Control Control of H. Unlike the Sunn Pest, the flour-baking quality of grain damaged by thrips does not decrease, however the sowing quality of seeds drops notably.
The period of metamorphosis is strongly prolonged about one month. Close Find out more.
Haplothrips (Haplothrips) tritici – Thrips Wiki
A close relation was found between the closeness of the ears and the degree of damage. Information was provided showing that late winter wheat varieties were times more infested by H. Formation of thrips Thysanoptera fauna of wheat sowings on new lands of North Kazakhstan. User Username Password Remember me. Krasilovets and Rabinovich reported that late winter wheat varieties were times more infested than early varieties.
In spring they rise to the surface where they pass through a complicated metamorphosis pronymph, nymph I, nymph II, adult. Biological Control The effect of natural enemies on field populations of H.
In the Saratov region of the former USSR, duringtests were carried out in irrigated wheat fields to determine the injuriousness of H. Ttitici Login to verify subscription. Features of biology, ecology and harmfullness of wheat thrips, Haplothrips tritici Kurd. The number of adults, eggs and nymphs on spring wheat were These brown spots may appear on the wheat germ or on the back or in the furrow of the grain Bournier and Bernaux, ; Han and Xu, The species is widespread in steppe and haplotthrips regions, belonging to the Euro-Siberian faunistic complex.
The weight trihici grains of the sample haplofhrips the minimum population of thrips nymphs served as his standard of comparison. It was shown in special tests that the roots of seedlings from grain damaged by H. The results revealed a certain relationship between the number of thrips tirtici an ear at the stage of blooming and the consequent loss of grain weight. Since the damaged grain was not eliminated when milled, their presence much reduced the commercial value of the flour.
The leaves of wheat are sucked by H. In Russian Shurovenkov Yu. Knowledge Bank home Change location. Article Tools Print this article.
Haplothrips (Haplothrips) tritici
Chemical treatment might be envisaged in some cases, but never later than the haplofhrips of milky ripeness Kamechenko, At this ratio of host to predator, marked damage to crops does not occur and other control measures may be unnecessary. The egg-laying period lasts naplothrips. A field study carried out in China in during the growth stages of winter wheat and spring wheat showed that from early May to early June, the number of adults at the last stage of booting or the initial heading stage, the number of eggs at flower stage and the number of nymphs at milk stage on winter wheat were 3.
Haplothrlps often they feed behind a sheath of penultimate leaf, sucking sap from the gentlest part of ear husk. In Bulgaria, research showed that the wheat varieties which had a shorter vegetation period were attacked to lower degrees and showed lower loss than wheats that matured later Veselinov,