HAPLOTHRIPS TRITICI PDF
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):||26 January 2008|
|PDF File Size:||15.21 Mb|
|ePub File Size:||11.72 Mb|
|Price:||Free* [*Free Regsitration Required]|
Host-Plant Resistance Varieties of wheat in which the last stage of booting or the initial stage of heading is earlier than the peak occurrence of H. 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.
The selection of varieties of hard wheat with characteristics that prevent H. The most intensive flight coincides with the beginning of ear formation of spring wheat where the great bulk of adults concentrate. Adult has immature ovaries and requires additional feeding. The results indicated that the danger from nymphs was not very high, though it was increased in the dry season of The body is elongated, thin and black-brown to black. In China, indimethoate and trichlorphon were applied for control of H.
Bioecological features of wheat thrips in north Kulunda and Ob forest-steppe. Tijdschrift voor Entomologie, 55— Die Tierwelt Deutschlands66, 1— In Russian Grivanov K. The ratios among the adults, eggs and nymphs were 1: Bournier and Bernaux found that H. Ears with a close structure, having little space between the scales, were less heavily infested than ears with a more open structure Shurovenkov and Mikhailova, Go to distribution map In spring the larvae passing through metamorphosis perish because of heat and lack of moisture.
Alopecurus aequalis Dent foxtail.
African Journal of Biotechnology
Both adults and larvae are dangerous, but the latter are usually more noxious, invoking partial or complete white ear effect, drying of flag leaf, partial ear fertilization, and incomplete grain filling.
In Bulgaria, research showed that the wheat varieties which haplothripx a shorter vegetation period were attacked to lower degrees and showed lower loss than wheats that matured later Veselinov, The examination was done at the end of the milk stage or the beginning of the wax-ripe stage of spring wheat.
Fore tibia yellow except for the base and edges, fore tarsus yellow. Predatory thrips, Aelothrips spp.
Feeding by both adults and nymphs reduced the weight of the grain and had an adverse effect on its quality Lakhmanov, A study of the damage to crops by thrips under the natural conditions prevailing in southern Ukraine was carried on for four years.
Taking into consideration the difference between the weight of uninfested grains and that of grains with different degrees of infestation, estimates of total yaplothrips loss have been made.
It was shown in special tests that the roots of seedlings from grain damaged by H.
Haplothrips (Haplothrips) tritici – Thrips Wiki
Lower densities of H. The egg-laying period lasts days. In the Triticj district of Romania inH. Thelytoky males occur rarely and do not participate much in reproduction is registered in some regions, while in the others arrhenotoky sex ratio near to 1: Volodichev reviewed the harmfulness of H. Email the author Login required.
AgroAtlas – Pests – Haplothrips tritici Kurd. – Wheat Thrips
According to this, if there are 18 adults per ear, then there tritick be about Features of biology, ecology and harmfullness of wheat thrips, Haplothrips tritici Kurd. The damage caused in the furrow, produced when the wheat thrips penetrate beneath the glumules and puncture the cells hapltohrips the pericarp during the milky stage of ripeness, is the most important. Thysanoptera in forest-steppe of middle Volga region.
Unlike the Sunn Pest, the flour-baking quality of grain damaged by thrips does not decrease, however the sowing quality of seeds drops notably. Egg is pale-orange, oblong-oval, 0. Deutsche Entomologische Zeitschrift57, —