THE MEALY-BUG CALLED PSEUDOCOCCUS BROMELIAe, AND OTHER COCCIDS
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چکیده
منابع مشابه
Suppression of two-spotted spider mite (Tetranychus urticae), mealy bug (Pseudococcus sp) and aphid (Myzus persicae) populations and damage by vermicomposts
A vermicompost, produced commercially from food wastes, was tested for its capacity to suppress populations and damage to plants, by two-spotted spider mites (Tetranychus urticae), mealy bugs (Pseudococcus sp.) and aphids (Myzus persicae), in the greenhouse. A range of mixtures of food waste vermicompost and a soil-less bedding plant growth medium Metro-Mix 360 (MM360) was tested in cages (40 c...
متن کاملHarmful supernumerary chromosomes in a mealy bug population.
HE supernumeraries, or B chromosomes, of the mealy bug, Pseudococcus obscurus, have been shown to undergo preferential segregation both in oogenesis and in spermatogenesis (NUR 1962a). In a female with two supernumeraries, they do not pair during the first meiotic division but usually pair and segregate regularly in the second division. However, when one or an odd number is present the unpaired...
متن کاملReversal of heterochromatization and the activity of the paternal chromosome set in the male mealy bug.
N male mealy bugs with the lecanoid chromosome system, one haploid set of I chromosomes becomes heterochromatic early in embryogeny, whereas both haploid sets of female nuclei remain euchromatic. The heterochromatic set was first described by SCHRADER (1921 ) . Later, HUGHES-SCHRADER (1935) showed that this set was not transmitted by the male to its offspring. SCHRADER and HUGHES-SCHRADER (1 93...
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The mealy bug, Rhizoecus amorphophalli, is a menace to the aroid farmers due to the intensive infestation on stored tubers. Spraying of pesticides was able to control this pest but it always left a chance for fungal growth. Bacterial endosymbionts associated with the insects provide several benefits to their host. Since such endosymbionts play a vital role even in the physiology of their host, ...
متن کاملImportance of the so-called 'other' sexually-transmitted diseases.
(1) Some data are presented concerning the frequency and potential morbidity of sexually-transmitted organisms other than T. pallidum or N. gonorrhoeae. (2) Most of the diseases with which these organisms are associated are more prevalent than syphilis and some, at least in one sex, are as common as gonorrhoea. A number appear to carry considerable morbidity, which in the case of Type II herpes...
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ژورنال
عنوان ژورنال: Science
سال: 1922
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.56.1446.308-a