What is BPH in agriculture?
What is BPH in agriculture?
Both brown planthopper(BPH) and white backed planthopper(WBPH) are known for their resistance to commonly used insecticides including the neonicotinoids. Hence crop failures due to severe pest outbreaks are very common in many rice-growing tracts of India.
Which stage of BPH causes damage to paddy crop?
Damage. BPH infest the rice crop at all stages of plant growth. Due to feeding by both the nymphs and adults at the base of the tillers, plants turn yellow and dry up rapidly. During the early infestation stage, round yellow patches appear, which soon become brownish due to the drying up of the plants.
How do you control BPH in rice?
Control measures: When there is one or more brown planthoppers per tiller and when fewer natural enemies than pests are seen, then management of this pest is necessary. Drain water completely from the field for a week. Then apply intermittent (weekly) irrigation to reduce the BPH population.
How many nymphal instars are found in life cycle of brown plant hopper?
The nymph undergoes five instars within a period of 15-20 days the total life cycle is completed in about 20-25 days, which varies in the two sexes. The life span of male is 15-20 days and that of female is 15-30 days.
Which is not natural predator of BPH?
Natural enemies of BPH such as lady beetles, spiders and wasps are also affected by these pesticides. As a result, farmers are faced with BPH problems that can cause yield losses of 30-100%. Furthermore, BPH is also a vector of ragged stunt virus and grassy stunt virus diseases in rice.
Which is regular pest?
Regular pests: Occurring more frequently on a crop having close association with the crop. (eg) Brinjal shoot and fruit borer. Occasional pests: Occurring infrequently with no close association with a particular crop (eg) Snake gourd semilooper. Seasonal pests: Occurring during a particular part of the year.
Which of the following is not a natural predator of BPH?
Which of the following is not a natural predator of BPH? Sol: (b) Red ants.
Which is not a natural predator of BPH?
How many ETL release control of brown plant hopper?
Economic Threshold Level (ETL) of Paddy Insect Pests
|Name of the Insect Pests||Economic threshold level|
|Brown plant hopper||5-10 hoppers/hill.|
|Green plant hopper||10-20 hoppers/hill.|
|White back plant hopper||10-20 hoppers/hill.|
|Rice Hispa||1-2 adults/hill.|
Where does the brown planthopper live?
NILAPARVATA LUGENS (Stål), commonly known as the brown planthopper (BPH), is widely distributed in tropical, subtropical, and temperate regions of Asia, where occasional outbreaks seriously injure cultivated rice.
What should BPH levels be for ageing men?
BPH… ” (Prins 2008). Therefore, based on these and other findings, Life Extension suggests that aging men strive to maintain estradiol blood levels between 20 and 30 pg/mL for optimal prostatic and overall health.
Is there a treatment for benign prostatic hyperplasia ( BPH )?
It has been shown to improve BPH symptoms in several clinical studies. Pygeum africanum. Also known as African plum, P. africanum may prevent the growth of prostate cells. Moderate relief of urinary symptoms was seen in subjects with BPH who were treated with African plum. Rye pollen.
Which is the gold standard treatment for BPH?
Transurethral Prostatectomy (TURP) This procedure is considered the “gold standard” of BPH treatment — the one against which other therapeutic measures are compared. It involves removal of the core of the prostate with a resectoscope — an instrument passed through the urethra into the bladder.
Can a BPH index be used to diagnose other diseases?
However, this index cannot be used for diagnosis, since other diseases can cause symptoms similar to those of BPH.