Search results
Results from the WOW.Com Content Network
In the eastern vineyards this disease is estimated to infect 30% of grapes while in California it can infect up to half. [83] This can reduce yields by 40–60%. [15] [84] Much like black rot, bunch rot overwinters in the berries and infects the next season's crop through spore ejections in the summer. [85]
The disease cycle begins with the overwintering structures. The grape black rot pathogen overwinters in many parts of the grape vine, especially mummies and lesions, and is able to overwinter on the vineyard floor. [3] In fact, "Viable lesions capable of producing conidia can persist in wood for at least 2 years."
A cartoon from Punch from 1890: The phylloxera, a true gourmet, finds out the best vineyards and attaches itself to the best wines. Punch magazine, 6 Sep. 1890. This is a list of diseases of grapes (Vitis spp.).
Phomopsis cane and leaf spot is a disease that causes symptoms in the common grapevine species, Vitis vinifera, in many regions of the world. [2] This disease is mainly caused by the fungal pathogen, Phomopsis viticola, and is known to affect many cultivars of table grapes, such as Thompson Seedless, Red Globe, and Flame Seedless. [3]
For the sugarcane crop to be infected by the disease, large spore concentrations are needed. The fungus includes a structure known as a 'smut-whip', a curved black structure which emerges from the leaf whorl, which helps to spread the disease to the other plants, usually over a period of about three months.
Fungicide sprays applied in a timely manner are highly effective against the rust diseases during the apple cycle. [12] Most protective fungicide sprays are applied four times at 7- to 10-day intervals, starting with pink bud on crabapples. These applications are to protect the apples from spores being released from the cedar host in mid-spring.
The word pesticide derives from the Latin pestis (plague) and caedere (kill). [5]The Food and Agriculture Organization (FAO) has defined pesticide as: . any substance or mixture of substances intended for preventing, destroying, or controlling any pest, including vectors of human or animal disease, unwanted species of plants or animals, causing harm during or otherwise interfering with the ...
Fungicide residues have been found on food for human consumption, mostly from post-harvest treatments. [16] Some fungicides are dangerous to human health, such as vinclozolin, which has now been removed from use. [17] Ziram is also a fungicide that is toxic to humans with long-term exposure, and fatal if ingested. [18]