A healthy garden is a reflection of balanced and well-cared-for plants. But when the weather alternates between hot days, cold nights, drought, and humidity, the scenario becomes ideal for the emergence of sick plants. In these conditions, fungi, bacteria, and pests find fertile ground to settle - affecting everything from large crops to small pots at home!\n\nThe professor Adriana Matos, from the Agronomy course at Una Jataí, warns that the vulnerability of plants intensifies during these periods of climate fluctuation. "Some diseases settle precisely when the plant is most vulnerable. Others, such as the white spot on corn, are typical of this period, with colder nights, making the projects conducive to their spread, especially in later-planted corn," she explains.\n\nHow to identify sick plants\nObserving signs is the first step to act in time. Yellowed leaves, spots, mold, uneven growth, and difficulty blooming are common indications. Among the most recurring diseases are: \n * White mold: Affects crops like beans and cotton.\n * White spot: Common in corn during colder periods.\n * Ramularia: Affects cotton, starting at the lower part of the plant and compromising the quality of the fiber. "This disease tends to appear with strength in this period when nights are more humid due to dew, and days remain hot. This directly undermines the quality and quantity of cotton fiber," Matos reinforces.\n\nImpact of climate on plants\nRecent rains bring relief but also increase the humidity. "This favors the appearance of fungi and other diseases, which find ideal conditions to proliferate," says the professor. Another concern is the cotton boll weevil, which has gained strength due to the lack of control of so-called wild plants (those that grow spontaneously and function as a green bridge for the reproduction of the pest).\n\nWhat to do to control sick plants\nPrevention is the best strategy. This means closely monitoring the development of the plants and acting before the first symptoms. "It is essential to know well the hybrid or cultivar planted. Ideally, applications should be made even before the first visual symptoms appear," Matos advises. In this regard, the professional's tips are:\n * Know the cultivated species, as some are more sensitive.\n * Carry out preventive applications of pesticides or natural solutions.\n * Improve air circulation between the plants.\n * Adjust the watering frequency to avoid excess humidity.\n\nIntegrated management: long-term solution\nFor Matos, the key lies in the integrated management of pests and diseases. "Rotating techniques and products is essential to prevent pathogens and pests from becoming resistant," she explains. In a home garden, this can mean varying fertilizers, alternating species, investing in quality substrates, and constantly monitoring the plants. This combination of strategies reduces risks and promotes more balance even in the face of climate changes.
