共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
3.
4.
5.
6.
7.
瓜类枯萎病又称蔓割病、萎凋病,是一种世界性土传病害,主要危害葫芦科植物。近年来由于我国瓜类栽培面积逐渐扩大,瓜类枯萎病发生较普遍,已严重危害瓜类作物的生长。本文从生物防治、化学防治和农业防治概述了瓜类枯萎病防治上的研究进展。 相似文献
8.
1瓜类枯萎病概述瓜类枯萎病又叫蔓割病、萎蔫病,是瓜类主要病害,分布广泛。主要危害黄瓜、西瓜,也可危害甜瓜、西葫芦、丝瓜、冬瓜等葫芦科作物,黄瓜每年发病率为10%~30%,严重时可达80%~90%,甚至绝收。其典型症状是萎蔫。幼苗发病、子叶萎蔫或全株枯萎,茎基部变褐缢缩,导致猝倒。大田发病一般在植株开花后开始出现病株,发病初期病株表现为叶片由下向上逐渐萎蔫,似缺水状,数日后整株叶片萎蔫下垂;茎蔓上出现纵裂,裂口处流出黄褐色胶状物,病株根部褐色腐烂,纵切病茎检查,可见维管束呈褐色。疫病病菌也能引起瓜类枯萎症状,但疫病病株不流胶,… 相似文献
9.
10.
1真菌性病害常见瓜类真菌性病害有黄瓜疫病、黄瓜炭疽病、西瓜炭疽病、甜瓜炭疽病、黄瓜枯萎病、黄瓜蔓枯病、黄瓜黑星病、南瓜白绢病和冬瓜白绢病等。这些病害多数以菌丝体潜伏于种子内,也有的以分生孢子或菌核附着于种子外表。种子消毒方法有:(1)温汤浸种:将种子放在55℃温水中浸种15min,然后用冷水冷却,催芽后播种。(2)药剂浸 相似文献
11.
12.
《中国瓜菜》2019,(8):83-85
甜瓜种植快速发展,产生了数量巨大的废弃物——甜瓜秧蔓,大量堆积路旁对环境造成了污染。笔者以河北双星种业有限公司生产的‘双剑’甜瓜品种为来源,选取10株甜瓜,对其商品产量与秧蔓产量进行了测定,对两者之间的相关系数进行了测验,建立了相关关系直线回归方程式并进行回归关系方差分析。结果表明,单株甜瓜秧蔓产量与甜瓜商品产量之间的相关系数为r=0.976,两者之间存在极显著正相关,直线回归方程式y=0.916x+1.434。在甜瓜产后秧蔓处理方面,可以通过本试验确立的甜瓜商品产量与秧蔓产量相关关系直线回归方程式,依据甜瓜商品产量测算甜瓜秧蔓产量,为甜瓜秧蔓的处理提供数据依据。 相似文献
13.
14.
《Scientia Horticulturae》1986,28(3):251-261
Based on the theory of continental drift, the occurrence of feral and semi-feral melons in certain parts of the world, and the Mosaic, Biblic and Koranic theories, the watermelon is supposed to have originated in Central Africa and the muskmelon in south-eastern Africa and peninsular India. The present day occurrence of these plants in different parts of the world may be the result of dispersal by birds, animals and man.The present-day muskmelon, Cucumis melo, evolved from the African horned melon, C. metuliferus. The cucumber, C. sativus, is an off-shoot in the evolution of muskmelon. In its various forms and designations, C. melo has undergone numerous genetic, morphological and biochemical changes before it acquired its current form.The paper presents the earlier concepts which prevailed on this subject, and proposes some more probable theories. 相似文献
15.
羊肚菌是一种名贵的珍稀食用菌,在欧洲和中国具有丰富的文化底蕴和悠久的食用历史,其营养保健价值高,蛋白质含量约为28%,含有18种以上氨基酸,不饱和脂肪酸含量丰富,除常规的矿质元素外,还是确定的富硒产品。羊肚菌的生理活性物质包括多糖、多酚、蛋白水解物,以及γ-氨基丁酸、甾醇、呋喃化合物等,药用功效包括提高机体免疫力、抗疲劳、抗氧化、抗癌、抗肿瘤、抗菌消炎、降血脂和保肝健胃等。羊肚菌已实现人工栽培,人工产品在数量和品质上均高于野生,也已行销于市场。目前的产品形式主要为鲜品、冻品和干品,因产品形式和等级不同,消费流通渠道和烹饪方式有异。 相似文献
16.
17.
18.
佛手柑又称佛手、五指柑、佛拳,为芸香科柑桔属香橼的变种,原产于中国和印度,在我国广东、福建、安徽、广西、浙江、四川和云南等地有广泛栽培,因其果实呈掌状分裂,形状奇特,似观音手指,或握拳如如来拳头而得名,佛手的变异很多,掌状裂者称“佛手”或“长佛手”,不完全分裂者称“佛拳”。佛手是名贵的中药,其果实适合制成果蜜、果脯,并可加工佛手茶、佛手露、佛手果冻、佛手香酒等,是药食两用的天然保健食品,经常食用有益于人们的身体健康;佛手还是闻香赏果的花卉珍品,具有极高的观赏价值。被誉为“果中仙品,世上佳卉”,在港、澳、台及东南亚… 相似文献
19.
20.
《Scientia Horticulturae》2005,106(4):568-581
The response of melon (Cucumis melo) plants to long-term salinity was investigated to determine the availability of the NaCl pre-treatments (seed priming + seedling conditioning) as an interesting strategy for increasing the salt tolerance. Seeds of melon cultivars “Hasanbey” and “Kirkagac” were primed with 18 dS m−1 NaCl solution for 3 days at 20 °C. During emergence and seedling growth, non-primed seeds were irrigated with local irrigation water (EC: 0.3 dS m−1) whereas primed groups were treated with 9.0 dS m−1 saline solution for 35 days. Seedlings derived from pre-treated (P) and non-pre-treated (NP) groups were transplanted to 8 l pots. After transplanting, salinity treatments were started with the first irrigation. The salinity treatments consisted of five levels (control, 4.5, 9.0, 13.5 and 18.0 dS m−1) of irrigation solution for a period of 90 days. NaCl pre-treatments diminished the inhibiting effect of salinity on growth of melon plants. However, competence for salt adaptation varied with cultivar and the level of salinity. The physiological response of the P plants was also maintained in the long-term. Stomatal conductance and relative chlorophyll content of P plants tended to be higher than those of the NP ones. In addition, NaCl pre-treatments enhanced K and Ca concentrations of leaves and stems, and prevented toxic effects of salinity because less Na accumulated in stems. These results suggest that the use of NaCl pre-treatments could be a useful strategy to increase the salt tolerance of melon plants in the long-term and also to permit the establishment of melon crop by direct sowing in a saline medium. 相似文献