» Angular leaf spot, bacterial wilt, Phytophthora crown and root rot, and powdery mildew are important diseases on cucumber.
Symptoms: White powdery growth on leaves, may be on upper and lower leaf surfaces and stems. Powdery mildew on cucumbers is caused by two primary fungal pathogens, Podosphaera xanthii and Erysiphe cichoracearum. Fungal spores spread by wind.
FDA, CDC, and state partners continue to investigate a multistate outbreak of Salmonella Typhimurium infections linked to cucumbers. As of December 17, 2024, a total of 100 people infected with the outbreak strain of Salmonella have been reported from 23 states.
Currently, there is no way to treat this fungal cucumber disease. If wilt is suspected, any diseased plants and the soil they were grown in need to be removed and destroyed, rather than added to a home compost system.
Vine crops are heavy water feeders, so you should constantly check soil moisture. Cucumbers need about one inch of water from rainfall or irrigation each week during the growing season. Always soak the soil thoroughly when watering. Water sandy soils more often, but with lower amounts applied at any one time.
External fruit lesions appear as irregular circular spots that are initially yellow, then grey to brown. These lesions are soft, wet, sunken, and often contain spots of gummy exudate at the centre. Symptoms become visible mostly during storage.
Discard Discard Small mold spots can be cut off FIRM fruits and vegetables with low moisture content. It's difficult for mold to penetrate dense foods. SOFT Fruits and vegetables with high moisture content can be contaminated below the surface. Porous foods can be contaminated below the surface.
Cucumbers are generally quite uniform with an elegant curve and slender bodies, so deformed cucumbers are a sign something is wrong. If the fruit is pinched, has a smaller end, or any other form of misshape, it may be suffering from too little water. Inconsietent watering will cause fruit to form in an irregular way.
Bifenthrin, cyhalothrin, or cypermethrin will control cucumber beetles, squash bugs, squash vine borers, and pickleworms, but wait 3, 7, or 1 days, respectively, after spraying and before harvest. Table 1. Natural, Less Toxic Pesticides & Contact Pesticides to Control Cucurbit Insect Pests.
The symptoms vary but typically leaves will turn a dull green and progressive wilting of lateral leaves occurs. At home diagnostic techniques can be useful to identify the disease. Cucurbit bacterial wilt is transferred from plant to plant through striped and spotted cucumber beetles.
Cucumbers love water, lots and lots of water. Take the hose to them and let the water flow. And even if they are well watered, extreme heat can make them wilt slightly. Watch after the sun goes down, they'll perk right back up.
The pathogenicity test showed that the symptoms of Fusarium wilt disease was firstly appeared as yellowing of old leaves. Progressively, the infected plant will be wilted and finally died.
Underwatering cucumbers also results in yellow leaves. When plants get too dry, leaves curl, turn brown at the edges and fade from green to yellow, dry up, and fall off. Cucumbers are 96% percent water, the highest water content of any vegetable, so they need lots of water to survive.
However, as soon as the first flowers start to appear the cucumber plant requires a higher level of potassium to encourage further flowering and subsequent fruiting. A high potassium fertiliser, such as tomato feed or a balanced fertiliser mix including potassium can be used as per the instructions.
Water often enough to keep the soil slightly moist all the time. Cucumbers will be small and can taste bitter if they get stressed for water. Mulch the soil around the plants to keep in moisture.
Timing is everything. Watering in the early morning sets your cucumbers up for a day of hydrated success, reducing evaporation and giving them time to drink up before the midday sun turns your garden into a sauna.