The results show that 72% Curzate WP, 72% Cymoxanil . Mancozeb WP and 72.2% Previcurn AS against cucumber mildew, while 40% Pyrimethaml SC, 40% Scala SC and 50% Carbendazin . Diethofencarb Wp against tomato grey mould have much controlling efficacy.
he field trials were carried out for controlling Pseudoperonospora cuhensis on cucumber by propamocarb hydrochloride. The results showed that three dosages of propamocarb hydrochloride (600, 800 and 1000g A. I./ha)sprayed at begining stage of downy mildew of cucumber gave better control than phosethyl-Al did. The control effects are 69. 9～82. 3%, while the effect in demonstration at dosage of 800g propamocarb hydrochloride A.
The results show that the control effect of the fungicide for cucumber downy mildew is the same as that of 70% chlorotha lonil WP,for tomato gray mold is bette than that of 50% procymidoe WP.
The study on conditions for causing mildew of secretion from Psylla chinensis and the harm of mildea were performed. The results showed that the natural conditions in both high humidity and high temperature would result in mildea of the secretion from P. chinensis.
By studying and comparing indoor germination methods of watermelon seeds, we found that mildew bed can be prevented while watermelon seeds were treated with 0.2% CH 3CHO for 10 minutes,thus we can avoid mildew bed of indoor germination of some watermelon seeds.
The results show that 72% Curzate WP, 72% Cymoxanil . Mancozeb WP and 72.2% Previcurn AS against cucumber mildew, while 40% Pyrimethaml SC, 40% Scala SC and 50% Carbendazin . Diethofencarb Wp against tomato grey mould have much controlling efficacy.
But some fungicide, such as 75% Chlorothalonil WP against cucumber mildew, 50% Carbendazin WP and 50% Sumilex WP against tomato grey mould has become fungicide resistance;
Xuri variety is a F1 hybrid of two inbred lines C2-8-1-9 -4-3 and B5-3-6-2-6-1. It is resistant to downy mildew, gray mold and Phytophthora blight, less susceptible to Fusarium wilt and tolerant to pumpkin mosaic virus and powdery mildew. Plants grow mild strongly.
These two plant extracts had an inhibiting action on the germination of zoospores of downy mildew of melon and their inhibiting efficiencies were respectively 48.2% and 25.3%.
Indoor pot tests of controlling the downy mildew showed that the control efficiencies at 7 days after spraying the two extracts were 51.4% and 31.3%,respectively. The field tests showed that their control efficiencies at 7 days were 48.8% and 22.6%,respectively.
while myclobutanil(0.056 kg·hm-2),azoxystrobin(0.141 kg·hm-2),kresoxim-methyl(0.141 kg·hm-2) and flusilazole(0.028 kg·hm-2) also showed great inhibitory effects on cucumber powdery mildew(Sphaerotheca fuliginea),too.
It can be degraded by microorganisms such as mildew.
A mildew strain with high cellulase activity was isolated from mildewy maize cob and classified as Aspergillus glaucus XC9 by morphological and 18S rRNA gene sequence analyses.
Endogenous Abscisic Acid in Wheat Plants upon Inoculation with the Powdery Mildew Causative Agent (Erysiphe graminisf.
We studied the dynamics of the abscisic acid content in above-ground parts of wheat cultivars with different resistance against powdery mildew.
It was assayed by the HPLC method in healthy and diseased (inoculated by the powdery mildew causative agent) plants (from inoculation to the stage of pathogen spore formation).
This paper is a study on the Kinds of diseases.Their harm and Symptoms of herbaceous flowers in Beijing.The results of investigation indicated that more than 60 kinds of diseases were found to occurr on about 40 species of herbaceous flowers. among the diseases the more important ones of Common occurrence were the fungal diseases, virus, bacteria and nematodes etc were of less significance,most distinguished of there diseases are. garden balsam powdery mildew, sage mosaic virus, peony brown spot,chrysanthemum...
This paper is a study on the Kinds of diseases.Their harm and Symptoms of herbaceous flowers in Beijing.The results of investigation indicated that more than 60 kinds of diseases were found to occurr on about 40 species of herbaceous flowers. among the diseases the more important ones of Common occurrence were the fungal diseases, virus, bacteria and nematodes etc were of less significance,most distinguished of there diseases are. garden balsam powdery mildew, sage mosaic virus, peony brown spot,chrysanthemum brown spot .gladiolus wilt,dahlia powdery mildew and dahlia mosaic virus.
Our experiments which took us three year's showed that these is so-me relationship between the occurrence of downy mildew and the kinds of sugar in the plant body. It Is the tendrill at 5-6th node ( from top down ) which has the most steady quantity of soluble solid-state substa-nces in the juice with any varietv of cucumber.In general there is higher density of sugar concent in the upper tendril than in the tower ones; in a day there is higher density in the afternoon than in the Morning;before irrigation...
Our experiments which took us three year's showed that these is so-me relationship between the occurrence of downy mildew and the kinds of sugar in the plant body. It Is the tendrill at 5-6th node ( from top down ) which has the most steady quantity of soluble solid-state substa-nces in the juice with any varietv of cucumber.In general there is higher density of sugar concent in the upper tendril than in the tower ones; in a day there is higher density in the afternoon than in the Morning;before irrigation the density is higher than that after it is irrigated; in a fine day the density is higher than that in a cloudy day; if some cucumber were picked the density will get lower.
Resistance to downy mildew of nineteen Vitis species and variexties native to China, including 82 clones, was studied. The results showed that the resistance to downy mildew of various species was very different. The resistant species were: V. pseudoreticulata, V. davidii var. cya-nocarpa, V. piasezkii, V'. romanetii, V.flexuosa, V. bryoniifolia, V. hanco-ckii and V. yeshanensis. The susceptible species were- V. wilsonae, V. quinqnangularis, V. amurensis, V. davidii, V. adstricta, V. adstricta var....
Resistance to downy mildew of nineteen Vitis species and variexties native to China, including 82 clones, was studied. The results showed that the resistance to downy mildew of various species was very different. The resistant species were: V. pseudoreticulata, V. davidii var. cya-nocarpa, V. piasezkii, V'. romanetii, V.flexuosa, V. bryoniifolia, V. hanco-ckii and V. yeshanensis. The susceptible species were- V. wilsonae, V. quinqnangularis, V. amurensis, V. davidii, V. adstricta, V. adstricta var. ternata, V. betulifolia, V. /lexuosa var. parvifolia, Maihuang-grape (V. sp. ) Qinba-wild grape ( V.sp ) and Mi-grape ( V.sp. ) .
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