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What diseases need to be prevented and controlled in the cultivation of yardlong beans?
What diseases need to be prevented and controlled in the yardlong beans being grown? Please give an introduction. The main diseases of cultivated yardlong beans are as follows: 1. Identification and control of cercospora leaf spot. 1. Symptoms: It mainly damages leaves, stems and vines, and pods. In the early stage of the disease, purple-brown spots appear on both sides of the leaves. After they expand, they become nearly round dark brown lesions, 1~2 cm in diameter...
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How to prevent and control rust disease when growing beans?
How to prevent and control rust disease when growing beans? Please give an introduction. Rust disease is very prone to occur in the middle and late stages of kidney bean growth, and can harm leaves, stems and vines, and pods. When it harms leaves, the diseased leaves have yellow-green raised spots, which quickly turn yellow. After the epidermis ruptures, pinkish substances are released, and black scab-like spots may also appear later. Some leaves have...
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How do you prevent and control blight when growing yardlong beans?
How do you prevent and control blight when growing yardlong beans? Please explain the methods. For yardlong bean blight, the following methods can be used for prevention and control: 1. Symptoms mainly affect stems, leaves and pods, mostly occurring at or near stem nodes, especially near the ground. The diseased part is initially water-soaked, then becomes wet-rotted and constricted around the stem, and the leaves and vines above the diseased part die. ...
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How to Control Bean Borers: A Must-Read for Growers
How do you control bean borers when growing beans? Here is an introduction to borer control in bean cultivation: spraying should follow the principle of focusing on the buds, spraying during the flowering stage to kill the larvae inside the flower buds. The best time to spray is on a sunny morning between 8 and 10 a.m. when the buds are open. After the flowers fade, when the pods are more than 10 cm long, spray once to kill newly hatched larvae...
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What are the methods for controlling cowpea rust in autumn?
How do you control rust when growing cowpeas in autumn? Here is an introduction to the control methods. The growing environment for autumn-planted cowpeas has high temperatures and relatively high rainfall, and in addition the inoculum (urediniospores) left behind in the field from spring-planted cowpeas is abundant. Therefore, autumn-planted cowpeas are prone to rust, and farmers should carry out integrated control early. 1. Main symptoms: the whole...
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How to control the bean pod borer when growing yardlong beans?
How to best control the bean pod borer when growing yardlong beans? Please explain the methods. The yardlong bean pod borer, also called the yardlong bean moth, is one of the main pests of yardlong beans. The adult yardlong bean moths are scattered and concealed, fly over a wide range to lay eggs, and lay many eggs, so they are not easy to kill by spraying or trap. The adults lay eggs on the tender leaf parts of the plant, and after hatching in about 5--7 days the larvae bore into...
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What are the control methods for rice viral diseases?
How do you control rice viral diseases? Please explain the methods. Rice viral diseases occur in explosive, intermittent and migratory patterns. The severity of rice viral diseases is closely related to the cropping system, the population size and migration patterns of transmission vectors, climatic conditions and cultivation management measures. Control should implement the plant protection policy of "prevention first, integrated control"...
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What are the control methods for rice lodging and weed damage?
How to control lodging and weed damage in rice? Please introduce the control methods. Rice is prone to lodging and susceptible to weed damage, and the following countermeasures should be taken: Choose suitable varieties. When selecting direct-seeded rice varieties, besides having good quality, high yield and multiple resistance, they should also have the characteristics of fertilizer tolerance, short stature and moderate tillering. For early rice, medium-maturing varieties should be chosen...
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Detailed Explanation of the Causes of Rice Lodging and Control Methods
Why does rice lodge? How should it be prevented and controlled? Please give an introduction. The earlier rice lodging occurs, the greater the impact on yield; in severe plots, yield can be reduced by more than 50%, or even cause total crop failure. Lodging also has a great impact on rice quality, and at the same time increases harvest difficulty. Although rice lodging is related to windy and rainy weather, the main...
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How to control the brown planthopper and white-backed planthopper in rice?
How to control the brown planthopper and white-backed planthopper in rice? Please provide an explanation of the methods. The brown planthopper has occurred at level 5 for two consecutive years, with strong pesticide resistance, while the white-backed planthopper has occurred at levels 3 to 4 for many consecutive years; the main factors affecting their occurrence are the amount of immigration and the summer-autumn climate conditions. In the winter of 2006, the brown planthopper broke out massively in the rice-growing areas of Vietnam, indicating that this...
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