Phytotoxicity or disease? Learn these five strokes, you will also identify
Improper use of pesticides in crops caused the occurrence of phytotoxicity. Frequent symptoms of spotted plants, yellowing, malformation, withered, stagnant growth, infertility, detachment, and inferior fruits often appeared in affected plants. For example, irregular browning of rice leaves may occur in the early stage of paddy fields when rice is treated with improper butachlor, and when the corn is damaged by dimethyltetrachlorobenzene, the vertical growth of the heart leaves is reversed; the glyphosate damage at the seedling stage of the rice may cause the plants to grow. Dead yellow dead seedlings; improper use of green mellon in rapeseed, manifested as growth retardation, reduced branches; Bordeaux mixture can cause apple blossoms and fruit drop; watermelon affected by ethephon, melon pods dark red, smelly and so on. 1. Difference between spot-type and physiological diseases The spot-type phytotoxicity is often distributed irregularly on the plants, and the whole field is also light and heavy. Physiological diseases are generally common, and the parts where the symptoms appear are more consistent. Spot-type phytotoxicity and fungal phytotoxicity are also different. The former has a large change in spot size and shape; the latter has an onset center and the spot shape is relatively uniform. 2. The difference between jaundice-type phytotoxicity and deficiency-deficiency chlorosis Yellowing caused by phytotoxicity tends to develop from yellow leaves to dead leaves, sunny weather, rapid yellowing, lack of yellowing of nutrient elements, overcast days, slow yellowing, and yellowing often associated with soil fertility and fertilization Related to the level, the yellow seedlings in the field performed consistently. Compared with the virus-induced yellowing, the yellow leaves of the latter are often shredded green and strong, and the diseased plants show a systemic pathology, and the diseased plants are mixed with healthy plants. 3. The difference between malformed phytotoxicity and viral disease malformation The occurrence of malformation caused by drug injury is universal, and local symptoms are expressed on the plants; the malformations caused by viral diseases are often sporadic, often with mixed green, bright veins, wrinkled leaves and other symptoms. 4. The difference between injury and wilt and infective disease wilt There is no disease center caused by phytotoxicity, and most of them have a slow process. The first is yellowing and the last one is dead, and the rhizomes are not browned in the roots and stems. The infestation diseases caused by the withering are mostly obstructive tissues, and there is sufficient sunshine and evaporation. The first time the wilting occurs, and after the dying green plant is lost, the root canal is often browned. 5. The difference between drug delay and physiological disease and stiffness The prolonged injury caused by drug injury is often accompanied by drug spots or other symptoms of phytotoxicity. Physiological poisoning is characterized by poor growth of roots, and the lack of hormones in the form of stiff yellow leaves or dark green leaves. Tilapia Whole Round,Frozen Fish Tilapia,Whole Round Black Tilapia,Frozen Whole Tilapia Zhoushan City Shuangying Aquatic Products Co., Ltd.  , https://www.shuangying-aquatic.com